Could the Hydrogen Economy Run on Ethanol?

• Plans for a fuel cell car running on ethanol look like a clever way to circumvent the obstacles faced by other fuel cell vehicles.
• However, it is not clear that ethanol's perceived logistical benefits or emissions profile would give Nissan an edge in the competitive market for green cars.

Japan's Nissan Motor Co., Ltd. made headlines this week when it announced plans to produce a fuel-cell car that would run on ethanol, instead of hard-to-find hydrogen. As reported by Scientific American, the company expects to commercialize this approach by 2020, even though competitors like Toyota already have fuel cell cars in their showrooms. It's an interesting choice. Ethanol seems to offer logistical advantages over hydrogen, but the technical challenges involved aren't trivial, nor is ethanol without drawbacks from an energy or environmental perspective.

Fuel cells have long promised a different and potentially superior path to electrifying automobiles, compared to battery-electric vehicles (EVs) with their limited range and relatively long recharging times. One of the biggest obstacles has always been the lack of infrastructure and supply--hydrogen must first be liberated from water, methane or other compounds--and the problems of storing sufficient quantities of it on board. I've driven prototype fuel-cell vehicles (FCVs) and found the experience pretty similar to driving a regular car, as long as you have a hydrogen filling station handy.

Nissan makes the case that ethanol (chemical formula C2H6O) is much easier to source and distribute than gaseous hydrogen, and the process for making it give up its hydrogen is routine, at least under laboratory conditions. However, as the alternative energy research subsidiary of my former employer, Texaco Inc., found in pursuing a similar concept with gasoline, it's one thing to do this in a bench-scale device and quite another to do it in a size and shape that will fit easily and safely in a car and run as reliably as an internal combustion engine. I suspect Nissan's engineers have their work cut out for them for the next four years.

The bigger questions about this approach are more basic: Does it make sense from an economic, energy and environmental perspective, and can it find a large enough market? Consumers already have a wide range of green alternatives from which to choose, ranging from Prius-type hybrids (gasoline only), plug-in hybrids (gasoline + electricity) and battery EVs, not to mention the continuous improvement of non-electric cars. 

Nissan didn't include many numbers in the documents accompanying its press release, but the chemistry and math involved are pretty simple. At 100% efficiency, a gallon of ethanol could produce just under 0.8 kilograms (Kg) of hydrogen (H2) using the standard steam-reforming process. The best efficiency I could find for this ethanol-to-hydrogen conversion  was around 90%, so in the real world that gallon of ethanol would yield around 0.7 Kg of H2--enough to take Toyota's Mirai FCV about 46 miles. That's pretty good, considering that same gallon in a Chrysler 200 equipped as a flexible fuel vehicle (FFV) would drive an average of just 21 miles. Fuel cells are much more efficient than internal combustion engines.

The economics of operation don't look bad, either. If we use today's average US price for E85 (85% ethanol + 15% gasoline) of $1.87/gal. as a proxy for an ethanol retail price, that equates to around 4 ¢/mile, using the Mirai's published fuel economy data. That's about 15% cheaper than a Prius on regular gasoline at this week's US average of $2.40/gal., but it's also around 10% more expensive than a Nissan Leaf using off-peak electricity in northern California.

Emissions are trickier to assess. There's a lively and growing controversy about whether biofuels produced from crops can truly be considered carbon-neutral, even in places like Brazil where the yields from sugar cane are so high. There's much less controversy that the production of most US ethanol from corn is anything but a net-zero-emission endeavor. Corn requires fertilizer sourced from natural gas, and ethanol refineries consume gas (or coal) and electricity in their production process. In any case, when Nissan characterizes their planned ethanol FCV as having "nearly no CO2 increase whatsoever", they are either oversimplifying a very complex discussion or taking a large leap of faith. 

We can count the CO2 coming out of the tailpipe of such a car, and it would need a tailpipe because the onboard ethanol converter would emit about 12.5 lb. of CO2 for every gallon of ethanol converted to pure H2, plus some CO2 from the ethanol burned to heat the unit. My back-of-the envelope calculation gives a figure of 135 grams of CO2 per mile, or 20% lower than a Toyota Prius on gasoline. It would not be a Zero Emission Vehicle (ZEV), though of course an EV running on average grid electricity isn't really a ZEV, either, except in isolated regions or at specific times of day.

Even if there aren't any deal-killers here, I'm skeptical about Nissan's fundamental assumption that the ethanol infrastructure for their FCV would be that much easier to develop than the H2 infrastructure other FCVs require. That's because of the cost and ownership structure of the retail fuels business, which as I've argued previously helps explain why your corner gas station is unlikely to sell E15 (85% gasoline, 15% ethanol) any time soon, despite the EPA having approved it for newer cars. 

At least in the US, most gas stations are owned by small businesses, not by the oil companies whose brands they display. Margins are slim, and these folks don't have deep pockets, so adding a new fuel like pure ethanol or the ethanol-water mix that Nissan suggests, poses a difficult business decision: Do you take over an existing tank and stop selling diesel fuel, or premium gasoline with its high margins? Or do you rip up the forecourt to add a new tank, which entails being out of business for months--or even longer if you discover that one of your existing tanks is leaking? Either way, the investment costs and disruption to current customers are significant, in exchange for selling what at first would certainly be a low-volume product. When I was in the fuels supply & distribution business, we would have called that kind of decision a "no-brainer."

If Nissan can't encourage enough service stations to add ethanol or an ethanol/water blend--E85 would not work--to their product mix, do they start their own service station network? That seems unlikely. And if you buy one of these cars in a few years, should you carry a case of vodka in the trunk as an emergency range-extender? That's only half-facetious.  

I give Nissan credit for pursuing a novel option for making fuel cell cars more viable, as an alternative to today's range-limited EVs. Ethanol looks like a cost-competitive source of hydrogen, and it is at least easier to store than H2 gas or liquid H2. However, they face practical and marketing challenges that might well offset most of the advantages the company claims to see. The ethanol FCV could encounter the same chicken-and-egg dynamic as FCVs running on hydrogen, or indeed any new model requiring a fuel that is not distributed at scale today. It will be interesting to watch their progress.

2015: A Turning Point for Energy?

• 2015 was certainly an eventful year in energy, with plummeting oil prices and a widely anticipated global climate conference in December. It's less clear that it was a turning point. 

When I sifted through the major energy developments of 2015, I was surprised by the number of references I found to last year as a turning point, whether for the oil industry, the response to climate change, coal-fired electricity generation, or renewable energy. To this list I am tempted to add the decision to allow unrestricted exports of US crude oil for the first time in 40 years.

Major turning points are best identified with the passage of time. With so many legitimate candidates it might seem a bit deflating to note, as the chart below reflects, that the growth pattern for US energy supplies in 2015 looks a lot like the one for 2014. Despite low prices, oil and gas output posted solid gains, at least through October, while wind and solar power contributed modestly, when compared on an energy-equivalent basis.

There are sound reasons to think that next year's graph may look quite different, starting with oil. The petroleum industry is still in turmoil from its turning point in late 2014, when OPEC declined to cut its output quota to restore the global oil market to balance. In North America and much of the world, drilling and investment in new projects are down sharply, and US oil production is retreating from the 44-year peak it reached in April. The subsequent decline would have been even more pronounced without the contribution of new deepwater platforms  in the Gulf of Mexico that were planned long before oil prices fell.

However, anyone identifying 2015 as the start of a global shift away from oil, rather than another cyclical low point, must contend with some contrary statistics. Global oil demand appears to have increased by around 2%--equivalent to the output of Nigeria--in response to a 70% drop in oil prices. And despite a lot of media attention, electric vehicles--the leading contender to replace the internal-combustion cars that are the main users of refined oil--have yet to catch on with mainstream consumers.

Based on data from Hybridcars.com, US sales of battery-electric vehicles (EVs) grew slightly faster than the 6% pace of the entire US car market in 2015 but still accounted for less than 0.5% of all new cars. In fact, the combined US market share of hybrids, plug-in hybrids and battery EVs fell by 18%, compared to 2014, to below 3%. This is a respectable start for vehicle electrification, but it's not much different from the beachhead that hybrids alone occupied in 2009.

Although we might look back on this situation in a few years as a turning point, I believe that will depend on the condition of OPEC and the global oil industry, as well as the level of global oil consumption, when supply and demand come back into balance and today's high oil inventories are drawn down.

At the launch of API's latest State of American Energy report earlier this month I had the opportunity to ask Jack Gerard, the President and CEO of API, how he thought the current situation might change the oil and gas industry, and whether it would push it even farther towards shale development, including outside the US. His response focused on ensuring that policies will allow US producers to compete globally and build on the advantages of US resources, capital markets and rule of law to increase their share of the market.

As for US natural gas production, rising per-well productivity and growth in the Utica shale and Permian Basin offset less drilling in general and output declines in the Marcellus shale and elsewhere.  The continued expansion of gas is remarkable, considering that natural gas futures prices (front month) averaged just $ 2.63 per million BTUs for the year and dipped below $2 in December. The LNG exports set to begin this month look very timely.

Renewable energy, mainly in the form of wind and solar power, continues to grow rapidly as its costs decline. US renewables got an unexpected boost in December when the US Congress extended the two main federal tax credits for wind, solar and other technologies, including retroactively reinstating the lapsed wind Production Tax Credit (PTC).  Renewables should also benefit from the implementation of the EPA's Clean Power Plan, and from the effect of the Paris climate agreement on the investment climate for these technologies.

We may not know for years whether the Paris Agreement was truly a turning point for climate change, as many have suggested. Another prescriptive agreement with legally binding targets, along the lines of the Kyoto Protocol, was never in the cards. However, the Paris text is replete with tentative verbs, along the lines of, "requests, invites, recognizes, aims, takes note, encourages, welcomes, etc. "  It remains up to the participating countries whether and how they fulfill their voluntary Intended Nationally Determined Contributions and financial commitments.

The Paris Agreement could turn out to be the necessary framework for firm steps by both developed and developing countries to reduce emissions and adapt to climatic changes that are already "baked in", or it might shortly be overtaken by other events, as previous climate change measures were in the aftermath of the 2008 financial crisis. The current financial problems of the world's largest emitter of greenhouse gases--arguably the most important signatory to the Paris Agreement--are not a positive signal.

With so many uncertainties in play, we should consider all of these potential turning points as signposts of changes that depend on other interconnected factors, if they are to lead to a future that breaks with the status quo. There are enough of them to make for a very interesting 2016, even if this wasn't also a US presidential election year.

 

A different version of this posting was previously published on the website of Pacific Energy Development Corporation.

Cheapest Gasoline Ever?

Last week the Energy Information Administration  (EIA) reported that the $2.43 per gallon average US retail price for regular gasoline in 2015 was the lowest since 2009. A quick look at the EIA's handy page for comparing nominal and real fuel prices over time shows that last year's average, when adjusted for inflation, was actually the cheapest since 2004. A recent article suggested that current prices are lower than those in the mid-1960s, in the heyday of the American love affair with driving. I've lost the link, but that factoid checks out, too. However, even this understates the bargain currently on offer at the gas pump.

The price of gasoline is still one of the most visible prices in the US, prominently displayed on gas station signage and roadside billboards across the country. However, it only captures one aspect of how much motorists really pay, just as measuring fuel economy in miles per gallon misses the economic impact of driving. A few years ago I ran across a metric that combines these factors into a simple gauge of driving cost: miles per dollar, or mp$.

The chart below incorporates EIA data on inflation-adjusted fuel cost and data from the National Highway Transportation Safety Agency (NHTSA) on actual fleet corporate average fuel economy (CAFE) performance for each model year of passenger cars--not SUVs or light trucks--to display average mp$ for the last four decades.

Taking last week's average price of $2.03 for unleaded regular and using 36.4 mpg for the 2013 model year (the latest on NHTSA's site), today's fuel cost of driving is cheaper than at any time since 1978--and maybe ever. The 18 miles per dollar I calculated just beats the previous peak of mp$ in the late 1990s, when fuel economy was around 28 mpg and gas prices averaged barely over $1, due to the effects of the Asian Economic Crisis. By comparison, the $0.31 per gallon that motorists paid in 1965 was downright expensive, after adjusting for inflation and factoring in the low-to-mid-teens fuel economy of cars of the day.

Miles per dollar is also handy for comparing driving cost on gasoline to the cost of operating vehicles that use other fuels or electricity. When I first looked at miles per dollar in 2008, electric vehicles were significantly cheaper, per mile driven, than cars running on gasoline or diesel, even hybrid cars like the Prius. That gap still exists, but it has narrowed. At an US average residential electricity price of $0.126/kilowatt-hour last year, a Nissan Leaf or Chevrolet Volt would get around 26 mp$. However, in New England and other parts of the country with significantly higher-than-average electricity prices, the miles of driving that an EV can deliver per dollar of energy used could be less than that for gasoline in some locations.

A few caveats are in order. Based on data from the Transportation Research Institute at the University of Michigan, new-car fuel economy has slipped 0.8 mpg since oil prices started falling in the summer of 2014. And in any case, new cars are typically more efficient than the entire US car fleet, which includes older vehicles and substantial numbers of SUVs and light trucks. The Consumer Price Index is also an imperfect tool for comparing prices over long periods of time, because the Bureau of Labor Statistics periodically changes the components of the "basket" of goods and services that go into calculating the CPI.

None of those issues seems big enough to alter the basic conclusion that the gasoline cost of driving is exceptionally, perhaps historically cheap at the moment. If oil prices stay "lower for longer", as some experts expect,  changing the make-up--and thus the emissions--of the US car fleet is likely to be an uphill battle.

Rare Earths Not So Rare?

• The bankruptcy of the main US producer of "rare earth" materials signals the end of a multi-year crisis over their global supply and cost.

The announced Chapter 11 filing of US-based rare earths mining and refining company Molycorp effectively marks the end of a crisis that managed to escape the notice of most people. Rare earths are elements of low abundance, compared to the ores of metals like iron and copper. Despite their relative scarcity, they have proved extremely useful in industrial applications including renewable energy technologies. Five years ago it appeared that China had cornered the market on rare earths and was exercising its market power to, among other aims, lure businesses reliant on these minerals to shift their operations to China.

Molycorp's modernization of its rare earth mine in California and subsequent expansion into other aspects of the business were responses to a perceived global crisis. China's restrictions on rare earth exports threatened the economic competitiveness of hybrid and electric cars, wind turbines, non-silicon solar cells, compact fluorescent lighting (CFL), and other devices of interest to energy markets and policy makers.

The situation also raised concerns in the defense industry, due to the importance of rare earth metals and alloys in the manufacture of missile components, radar and sonar equipment, and other military hardware. Governments created or expanded strategic stockpiles for these materials, and took other steps to manage their reliance on supplies from China.

However, as reported by the Council on Foreign Relations last fall, the effectiveness of efforts by the Chinese government to leverage their control of rare earth supplies was short-lived. Its policies led to mostly market-based responses, involving both supply and demand, that undermined China's near-monopoly and ultimately contributed to Molycorp's present financial difficulties.

Molycorp wasn't the only company to bring new supplies into production, or the only one to struggle as the crisis unwound. New supplies were already in the pipeline at the time China restricted its exports, in reaction to price spikes that preceded the policy as global demand bumped up against the output of China's mines and processing facilities. Nor was government control of China's fragmented rare earth industry sufficient to prevent continued exports exploiting loopholes of the restrictions.

Finally, and probably most importantly for both China-based and non-China-based producers, innovators in the industries using these materials found ways to make do with lower proportions of rare earths in permanent magnet motors and generators, or to do without them altogether.

The upshot from an energy perspective is that if anything will slow the expansion of wind and solar power, hybrid cars and EVs, and other alternative energy and energy-saving technologies, it is unlikely to be a shortage of rare earths. They may be rare relative to other industrial commodities, but in the small proportions used it seems they are not rare enough to pose more than a temporary bottleneck.

What Will Fuel Today's Advanced Vehicles?

Last month I attended the annual "policy day" at the Washington Auto Show, which typically emphasizes green cars and related technology. This year it included several high-profile awards and announcements, along with a keynote address by US Secretary of Energy Ernest Moniz.  Yet while the environmental benefits of EVs and other advanced vehicles are a major factor in their proliferation, I didn't hear much about how the energy for these new car types would be produced.

The green car definition used by the DC car show encompasses hybrids, plug-in electric vehicles (EVs), fuel cell cars, and advanced internal-combustion cars including clean diesels. One trend that struck me after missing last year's show was that most of the green cars on display have become harder to distinguish visually from conventional models. For Volkswagen's eGolf EV, which shared North American Car of the Year honors in Detroit with its gas and diesel siblings, and Ford's Fusion energi plug-in hybrid the differences are mainly under the hood, rather than in the sheet-metal.

Of course some new models looked every bit as exotic as you might expect. That included BMW's i8 plug-in hybrid, which beat Tesla's updated 2015 Model S as Green Car Journal's "Green Luxury Car of the Year", and Toyota's Mirai fuel-cell car. The Mirai is expected to go on sale this fall in California, still the nation's leading green car market due to its longstanding Zero-Emission Vehicle mandate focused on tailpipe emissions. 

BMW i8 plug-in hybrid

Toyota Mirai fuel-cell car

Many of these cars have electric drivetrains, increasingly seen as the long-term alternative to petroleum-fueled cars. Although Secretary Moniz pointed out that the US government isn't attempting to pick a vehicle technology winner, there seemed to be a definite emphasis on vehicle electrification and much less on biofuels than in past years.

Another announcement at last month's session addressed where such vehicles might connect to the grid. BMW and VW have partnered with Chargepoint, an EV infrastructure company, to install high-voltage fast-chargers in corridors along the US east and west coasts to facilitate longer-range travel by EV. In making the announcement BMW's representative indicated that EVs will need fast recharging in order to compete with low gasoline prices. With the relative cost advantage of electricity having become a lot less compelling than when gasoline was near $4 per gallon, EV manufacturers need to mitigate the convenience concerns raised by cars with typical ranges of 100 miles or less. 

Getting energy to these cars more conveniently still leaves open the basic question of the ultimate source of that energy.  Perhaps one reason this isn't discussed much is that unlike for gasoline or diesel-powered cars, there's no simple answer. The source of US grid electricity varies much more than for petroleum fuels: by location, by season, and by time of day. However, even in California, which on average now gets 30% of its electricity from renewable sources and has set its sights on 50% from renewables by 2030, the marginal kilowatt-hour (kWh) of demand is likely met by power plants burning natural gas, due to their flexibility. That's especially true if many of these cars will be recharged near peak-usage times, instead of overnight as the EV industry expects.

Based on data from the EPA's fuel economy website, most of the plug-in cars I saw at the Washington Auto Show use around 35 kWh per 100 miles of combined driving. That reflects notionally equivalent miles-per-gallon figures ranging from 76 for the BMW i8 to 116 mpg for the eGolf. On that basis an EV driven 12,000 miles a year would increase natural gas demand at nearby power plants by around 30 thousand cubic feet (MCF) per year. That equates to 40% of the annual natural gas consumption of a US household in 2009. 

To put that in perspective, if we attained the President's goal of one million EVs on the road this year--a figure that may not be achieved until the end of the decade--they would consume about 30 billion cubic feet (BCF) of gas annually, or a little over 0.1% of US natural gas production. With plug-in EVs making up just 0.7% of US new-car sales in 2014, they are unlikely to strain US energy supplies anytime soon. 

It's also worth assessing how much gasoline these EVs will displace. That requires careful consideration of the more conventional models with which each EV competes. While a Tesla Model S surely lures buyers away from luxury-sport models like the BMW 6-series, thus saving around 500 gallons per year, an e-Golf likely replaces either a diesel Golf or a Prius-type hybrid, saving 250-300 gallons per year.  A million EVs saving an average of 350 gallons each per year would reduce US gasoline demand by 22,000 barrels per day, or 0.25%.

At this point the glass for electric vehicles seems both half-full and half-empty. The number of attractive plug-in models expands every year, as does the public recharging infrastructure to serve them. However, they still depend on generous tax credits and must now compete with gasoline near $2 per gallon. More importantly, at current levels their US sales are too low to have much impact on emissions or oil use for many years.

 

A different version of this posting was previously published on the website of Pacific Energy Development Corporation.

A Solar Car for the Masses?

• Ford is currently showing a concept car that addresses the shortcomings of solar-powered transportation in a clever way.

• If they can make it a cost-effective option, it would provide consumers a new kind of convenience, in contrast to the compromises inherent in most EVs.

It’s car show season again, with the annual crop of car-model launches like the new Corvette “supercar” and the Acura TLX prototype. However, my biggest regret in missing this year's Washington DC Auto Show was not seeing the Ford “C-MAX Solar Energi” concept, an unlikely marriage of electric vehicle (EV) and solar photovoltaic panels (PV). The car previously debuted at this year’s Consumer Electronics Show in Las Vegas.

This isn’t the first time a carmaker has put solar panels on the roof of a car, even if we exclude competitions like the Solar Car Challenge and other efforts to test how far or fast one-off solar vehicles designed by engineering students or enthusiasts could travel. However, I believe this is the first time an “OEM” has added solar panels to a production car for the purpose of providing a significant fraction of its motive power.
The biggest hurdles that any attempt to power a car with onboard solar panels must overcome are the low energy density of sunlight at the earth’s surface and the relatively low rate at which current solar panels can convert it into power. A typical EV requires 0.25-0.33 kilowatt-hours (kWh) of energy to travel one mile. 1.5 square meters of solar panel on the roof of a vehicle would receive on average only about 1.6 kWH per day in much of the US, assuming it was stationary and never parked under a roof or tree, and much less in winter. That’s only enough energy to travel 5 or 6 miles, or the equivalent of around 12 ounces of gasoline in a typical hybrid car. It's hard to fight physics.

The clever part of Ford’s solar design is its recognition that the rate of self-charging from the car’s rooftop wouldn’t be sufficient to liberate its owner from the gas pump without help in the form of an “off-vehicle solar concentrator.” This is essentially a glass carport that focuses the sun’s rays on the car’s PV roof and, according to the write-up in MIT’s Technology Review, works with the car’s software to move the car during the course of the day to keep the roof in the brightest area. That maximizes the amount of energy stored in the car’s battery, yielding enough for the daily needs of a fair percentage of drivers.

It’s not immediately obvious that combining two of the most expensive energy technologies of today — EV and PV — represents a good strategy for making them more competitive with the status quo, particularly given the likelihood of relatively stable gasoline prices for the next few years and the significant improvements being made in the fuel economy of conventional cars. 40 mpg highway is no longer considered remarkable. The ordinary hybrid version of the C-MAX is rated at 43 mpg combined city/highway, and the plug-in version on which the solar prototype is based is rated at 100 mpg-equivalent on electricity alone.

I have no idea what Ford would charge for the solar option should it eventually build the car, but it’s a good bet that it would be a significant multiple of the roughly $300 cost of the solar panels. Even without the Fresnel-lens carport, integrating PV into the car’s roof in a durable manner, together with the necessary changes to the car’s power management hardware and software, are unlikely to come cheap. Nor is it obvious that putting solar panels on a car’s roof is the best way to provide renewable electricity for vehicles. As Technology Review notes, Tesla is pursuing high-voltage (i.e., rapid) recharging facilities powered by stationary solar arrays, thus removing the constraint on effective PV area. It would be even simpler for many EV owners who want to avoid “exporting” their automobile emissions to fossil-fuel power plants to sign up for 100% renewable power from their local utility.

It’s no secret that EV sales have been disappointing, initially, for various reasons. 2013 sales figures for the US indicate that EVs, including plug-in hybrids like the non-solar C-MAX Energi, accounted for just under 100,000 new vehicles in 2013, or 0.6% of the US car market, compared to nearly 500,000 hybrids, or just over 3% of total sales of 15.5 million. If the US Congress eventually pursues tax reform along the lines suggested by recently retired Senate Finance Committee chair Max Baucus (D-MT), then the federal EV tax credit of up to $7,500 per car, which has helped push EV sales to current levels, would be in jeopardy. Carmakers should be thinking seriously about the long-term value proposition for EVs on their own merits.

The C-MAX Solar looks like a step in that direction. Once technology-hungry early adopters and the greenest consumers have been satisfied, the mass market will be seeking cars that compete on mainstream measures of convenience, cost and performance. In that light, even a Tesla that can be recharged to half its battery capacity in around 20 minutes via the company’s network of Superchargers falls short, compared to a gasoline car that can be refueled in under 3 minutes. No recharger on earth can deliver energy to a car at the effective rate of a gas pump, without dramatic changes in battery technology.

Yet the C-MAX Solar can do something that no other type of car can: make its own fuel, in a car that can also be refueled conventionally at any gas station, anywhere. That could provide a unique selling point, enhancing the convenience of cars in a totally new way, rather than requiring compromises on convenience as other plug-in EVs do.

I’ve long believed that the transition from fossil fuels to low-emission energy technologies has been hobbled by its dependence on government subsidies and would accelerate when those technologies can outperform on measures of “better, faster, cheaper.” Ford’s solar prototype must still demonstrate that it can become a real production car, rather just than a car show concept. If it does, it could help make EVs attractive to average consumers without requiring thousands of tax dollars in incentives. That could help create the basis for a truly sustainable transition to a new energy economy.

A different version of this posting was previously published on Energy Trends Insider.

Comparing Driving Costs of EVs and Conventional Cars

• A new Department of Energy website helps consumers compare the energy costs of EVs to non-plug-in cars by converting kilowatt-hours into "eGallons".
• How valid this proxy is depends heavily on assumptions about the cars being compared to EVs.  If hybrids set the bar, then DOE's eGallon prices are significantly understated.

I’ve been looking through a new website developed by the US Department of Energy (DOE) to assist consumers in comparing the energy costs of driving an electric vehicle (EV), relative to posted gasoline prices in their state. I heard about this site at the US Energy Information Administration’s (EIA) annual energy conference in Washington, DC last month. It sounded like a handy tool for both current EV owners and those considering buying one, but I couldn’t help thinking about it in the context of a presentation I saw at the same conference on the cost effectiveness of federal tax credits for EV purchases. A key question in both instances concerns just what kind of car is being replaced by that new EV.

The website uses simple math, together with the EIA’s continuously updated data on gasoline and electricity prices around the country, to come up with a national and state-by-state price for an “eGallon”. This imaginary construct is essentially the quantity of electricity that would take a typical EV as far as a gallon of gasoline would take the average new conventional car. As the text points out, it’s hard for consumers to calculate this for themselves. They see gasoline prices everywhere they drive but must dig through their utility bills to find their electricity price–not always obvious–and then might not know how to compare the two.

The site’s documentation indicates the eGallon calculation is based on the average energy usage of five specific EVs, including the Chevrolet Volt, Nissan Leaf, and Ford Focus EV, along with the 2012 EPA fleet average fuel economy for what EPA defines as small and mid-size cars. The result is side-by-side postings of the US average gasoline and eGallon prices, plus a drop-down menu to replicate that for each state. The site also includes the chart below, comparing these two prices over the last decade.

Two facts become immediately apparent. First, electricity is generally a cheaper fuel for cars than retail gasoline. That’s true for a variety of reasons, including the higher end-use efficiency of electric motors compared to internal combustion engines and the lower cost of most of the fuels used to generate electricity in the US. For example, the natural gas burned in power plants sold for the equivalent of $ 20.40 per barrel last year, while the global benchmark for oil averaged nearly $112/bbl. It also appears to be less volatile, at least at the level of national averages.

However, just as there’s no single gasoline price for the whole country, neither is there a single electricity price. Even the state averages used by the DOE to calculate eGallon prices mask a bewildering variety of regional electricity price tariffs and tiers. So your cost to recharge an EV might not just vary by location, but by time of year, time of day, and the specific rate plan that applies to you.

My main concern about the site derives from something much simper: the big central assumption that EVs compete with the average cars sold in America last year. According to the eGallon site, the average small-to-medium US car in 2012 got 28.2 miles per gallon (mpg) in combined city and highway driving. Using that figure, and with residential US electricity prices averaging 11.6 ¢/kilowatt-hour (kWh) in March 2013, the national eGallon price for March would have been $1.14/gal., compared to $3.71/gal. for unleaded regular gasoline. But what if we assumed that the cars most often compared to a new EV were not average cars, but other efficient cars, as logic and my intuition suggest? If we substituted the fuel economy data for a conventional Ford Focus or Toyota Prius hybrid, the eGallon price would jump to $1.26 or $2.03, respectively.

In some respects this result is fairly obvious. If you were already contemplating buying a hybrid, an EV won’t save you as much as if you were thinking of buying a conventional mid-size sedan. However, this distinction is important enough that the DOE should consider refining its eGallon calculator. EVs are much like wind and solar installations that cost more than conventional alternatives, but are expected to produce over their lifetimes economic or environmental benefits that offset those higher costs. The attractiveness of that big up-front investment is directly proportional to those benefits. I don’t have the data that would clarify the actual comparisons EV buyers are making, but someone must, perhaps including DOE. And it turns out that this isn’t just important for calculations like eGallon, but also for assessing the cost-effectiveness of federal EV policy.

That brings me to the Congressional Budget Office’s analysis of federal EV tax credits last fall. The report merits a posting of its own, but one nugget I gleaned from the presentation at the EIA Conference was that the CBO found that the current federal credit of up to $7,500 per car was still insufficient to make most EVs cost-competitive on a full-life basis with conventional cars. Yet despite this, the effective cost to taxpayers of each gallon of gasoline saved by a Leaf-type EV was well over $6 when compared to conventional cars getting average fuel economy, and over $10 vs. high fuel-economy compact cars. That’s assuming they save any gas at all, because of the way the Corporate Average Fuel Economy rules have been structured. Implied costs for greenhouse gas emissions avoidance were even more startling, at over $400/ton of CO2 in most cases.

The desirability of a tool like “eGallon” is rooted in the convoluted way we talk about transportation fuel economy and energy costs in this country. Miles per gallon is itself a poor metric, compared to something like gallons per 100 miles, or even miles per dollar. That's because it obscures the high value of modest improvements in high-consumption vehicles, while exaggerating the value of shifting from very efficient to ultra-efficient cars. It’s also more useful for policy makers than consumers, who are ultimately concerned about outcomes in dollars per mile or dollars per trip.

Recognizing the impracticality of training 300 million consumers to think about this subject differently, eGallon might prove useful, but only as long as it is grounded in the best information we have about the vehicle choices that potential EV buyers are actually considering. Since current EV incentives apparently provide a poor return to taxpayers, an overly simplistic tool that drives consumers too far in that direction might be worse than not having such a tool at all.

A different version of this posting was previously published on Energy Trends Insider.

Green Car Tech: Workhorses Trump Thoroughbreds?

Fisker Karma at 2013 DC Auto Show

Yesterday I made my annual trek to the Washington Auto Show, which hosts a media day before opening to the public.  Between the show's focus on policy--a natural draw inside the Beltway--and the opportunity to connect with OEM contacts, it's always worthwhile.  Besides, the cars never look the same on a screen or printed page as they do in person.  Yet despite all of that, this year's show left me with what I regard as a healthy form of disappointment: Unlike past years, which provided my first opportunities to see--and sometimes drive--cutting-edge cleantech cars like the Chevy Volt and Nissan Leaf, I saw ample signs of evolutionary change but no new revolutions in the offing. 

A few data points to support that conclusion: First, the Fisker Karma, undeniably sleek and reminiscent of my favorite Hot Wheels® car of long ago, was arguably the most exotic car there.  It sat unattended and largely ignored.  More significantly, the 2013 Green Car Technology Award announced at the show by Green Car Journal went to Mazda's "SkyACTIV" suite of technologies.  These include improvements in engines, transmissions and chassis that Mazda plans to roll out across its fleet, along with the North American launch of a clean diesel version of its Mazda6 sedan later this year.  Among the other finalists were Ford's stop-start and EcoBoost technologies, Fisker's "EVer" plug-in hybrid powertrain, and Fiat's Multi-Air gasoline engine efficiency package.  Half the candidate technologies related to EVs and hybrids, while the other half focused on making conventional cars incrementally more efficient--in the process raising the bar that EVs and hybrids must vault.   

Yesterday's policy day also provided a chance to meet with the team from Robert Bosch, LLC, which among its many business lines supplies under-the-hood gear for clean diesels and efficient gasoline cars, as well as hybrids.  Our conversation focused on clean diesel, which remains the least-appreciated big-bang fuel efficiency option in the US, despite its wide adoption in Europe, where diesels enjoy about a 50% share in "take rate", reflecting consumers' choices when more than one fuel option is available in a given model.  Diesel take rates range from 30-60+% here, too, but with only 20 diesel models available in the US last year--many of them German luxury models--overall diesel penetration in new cars was just under 1%.  That could start to change this year. Bosch's Andreas Sambel, Director of Diesel Marketing and Business Excellence, indicated 22 new models slated for 2013 introduction, with the total increasing to 54 models by 2017. 

We also discussed future improvements in diesel passenger car technology.  Bosch sees ample opportunities to maintain diesel's edge over steadily improving gasoline-engine efficiency.  Possible enhancements include engine downsizing, higher injection pressures (already 29,000 psi), the addition of stop-start, and combustion improvement via something called "digital rate shaping"--my jargon takeaway of the day.  I was surprised to hear that diesel-hybrid models are already available in Europe, since conventional wisdom holds that doubling down on two expensive efficiency strategies can't be cost-effective.  Mr.Sambel offered the view that hybrids are becoming a distinct market segment, and that fuel choice within that segment will appeal to some buyers.  I'll have to watch for further signs of this intriguing development.  I certainly concur with his take that there is unlikely to be a one-size-fits-all solution.  Don't expect an imminent winner among the proliferating powertrain and fuel choices available to motorists, including biofuels and CNG/LNG.

This year's DC Auto Show includes a wide selection of nicely sculpted steel and glass, but at least from a "green car" perspective the technologies that made such a big splash a few years ago are becoming a bit mundane.  That's just as well.  EVs still haven't taken off, yet, with only 53,000 sold in the US last year out of a much-recovered 14.4 million car total, despite lavish tax incentives.  However, with oil prices stubbornly high and US gasoline prices on the verge of setting new records for this time of year, the evolutionary improvements in fuel economy that were honored and displayed at the DC Convention Center will find plenty of takers.  For the near-term they'll contribute far more to saving oil and reducing emissions than a few more EVs could.

A Cleantech Trade War with China?

While we wait to see whether the next big move in oil prices--and hence gasoline prices--is up or down from today's level of around $125 per barrel, two stories in today's Wall St. Journal highlight some of the challenges facing manufacturers of equipment used to produce renewable energy. One concerns the intention of the US administration to seek the World Trade Organization's assistance in easing China's restrictions on its exports of rare earth materials used in a wide range of devices, including wind turbines, hybrid and electric vehicles, and some solar panels. The other is an op-ed offering a solution to the looming trade war over solar panel and wind turbine tower exports from China, modeled on the 1996 Information Technology Agreement that lowered trade barriers in that industry. The two stories are related, reflecting major unintended consequences of the ways we have approached our transition away from fossil fuels and toward lower-emission sources of energy.

Trade wars are risky things, because you never know where they will lead. The classic example of this is the Smoot-Hawley tariff of 1930. It and the responses to it by other countries helped deepen and extend the Great Depression, and I have never seen any analysis of them that concluded they were a good idea. A major trade dispute now over renewable energy hardware and the ingredients needed to produce it looks doubly unwelcome, because none of the parties comes to it with clean hands. Much of China's output of rare earths is being consumed by China-based manufacturers producing permanent magnet wind generators, electric vehicle motors, compact fluorescent lights, and solar equipment, much of which is exported to global markets that owe their very existence to government interference in the form of manufacturing, deployment and consumer tax credits; government loans and loan guarantees; feed-in tariffs; and fuel economy and lighting efficiency standards. There's hardly a single aspect of the global cleantech industry that is the result of unaided market forces.

The US complaint about solar imports is a good example. I wouldn't be surprised if the US government can make a strong case that the Chinese solar firms in question benefited from government assistance in ways that constitute unfair competition under established rules of international trade. Yet the same US government has provided substantial assistance to US solar manufacturers in the form of direct R&D support and federal loans and loan guarantees, as well as indirect help in the form of solar investment tax credits, cash grants, and project loans and loan guarantees that helped create and sustain a domestic market for them. All of these were necessary, because despite the significant cost reductions these incentives facilitated, the output of solar panels is still substantially more expensive than electricity from conventional generation. If we win this round with China, do we open the door to a whole series of WTO complaints against us by others who could claim harm from our own renewable energy policies?

From my perspective, these trade issues are a symptom of the larger problem of global overcapacity in wind and solar equipment manufacturing that has been created by the complex interaction of a mare's nest of national and local incentives and support for the production and deployment of these technologies, amplified by the disruption caused by the global financial crisis and recession of a couple of years ago and the ongoing financial crisis in Europe. A vast industry was created out of nothing and handed a market through a set of policies that could not sufficiently fine-tune development to prevent the emergence of a boom-bust cycle, and that now appears to be unsustainable itself in light of developed-country deficits and debts.

Trade disputes are one possible mechanism for attempting to rationalize this overcapacity, but in my view they constitute a much less productive approach than the one suggested by Professor Slaughter, who if I understand his proposal correctly is urging the rationalization of the government subsidies that have caused this situation in the first place. My biggest concern about his advice is his choice of the UN climate negotiating process as the best body to pursue such an initiative. That might be an appropriate venue, but its recent history doesn't inspire much confidence that it is up to the task.

D.C. Auto Show Focused on Efficiency

Last week I attended the media preview of the Washington Auto Show. With its dual focus on cars and energy policy, this is always a high point of the winter for me, even if this year's display lacked a draw of the magnitude of the pre-production Chevrolet Volt I drove at the 2010 show. Instead, I was pleased to find that the emphasis on fuel economy and technology in carmaker presentations was matched by a broad array of efficient and attractive new products. They still don't quite constitute the new car fleet needed for the 54 mile-per-gallon target the federal government requires them to meet by 2025, but in my opinion they're off to a very good start.

No one listening to the presentations I sat through last Thursday could have missed the shift in focus from previous years. Performance and drivability were still mentioned prominently, but in most cases the innovations allowing those attributes to be delivered along with improved fuel economy, instead of at its expense, received top billing. I heard about Ford's nine models that achieve at least 40 mpg, including the new C-MAX Energi plug-in hybrid that received Green Car Journal's Vision Award for 2012. GM touted a number of efficient new models, including the upcoming Chevrolet Spark subcompact, which will later be available as a full EV. In some respects I found the 2013 Malibu Eco with "e-Assist" even more impressive: With the new Malibu and this year's Buick LaCrosse, GM is building family-sized gasoline-powered sedans that achieve 36 or 37 mpg on the highway. And thanks to Fiat's MultiAir technology, Chrysler had its new 40 mpg Dodge Dart on display.

I was particularly interested in the VW press conference, where they debuted the 45 mpg 2013 Jetta turbo hybrid. The head of VW's US division introduced the car as part of his company's Think Blue sustainability drive, which with this latest model encompasses hybrids, clean diesels, efficient non-hybrid gasoline engines, and soon EVs. With all this technology to talk about, including the new, larger Passat sedan--where's the wagon?--built in VW's new Chattanooga, TN plant and sporting a diesel engine delivering 43 highway mpg (31 city), the biggest surprise was the amount of time he devoted to VW's partnership with Bikes Belong, a cycling safety group aimed at getting people out of their cars. That certainly reflects a bigger-picture view of vehicle sustainability.

My visit to the car show also included a meeting with Lars Ullrich, marketing director of Bosch Diesel Systems North America, and Jeff Breneman of the US Coalition for Advanced Diesel Cars. They updated me on the progress that diesels have been making in the US market, particularly in light of the greater cost-consciousness of consumers, post-recession. In the last five years, the willingness of consumers to consider diesels has nearly tripled to around one-third, while diesel sales passed the 100,000 mark for 2011--still less than 1%, but about where hybrids were just a few years ago. Clean diesel models are expected to double by 2014. Models with announced future diesel versions include the Chevrolet Cruze, Jeep Cherokee, Dodge Dakota, and a Mazda crossover. Will diesels ever reach the level of popularity here that they've attained in Europe, where half of all new cars are diesel-powered? They must wage an uphill battle against fuel economy regulations that are anything but fuel-neutral, legacy perceptions formed by the dirty diesels of 20 years ago, and federal and state fuel taxes that still assume that all diesel fuel is used by heavy-duty trucks that wear out our highways. That's a shame, because this is a terrific technology that could be every bit as attractive to many consumers as more expensive hybrids.

Another noteworthy item I gleaned from the manufacturers' presentations was that several of them are forecasting a return to annual US car sales of 16 million within a couple years. That would be good for the industry and employment, but it's crucial for shifting the fuel economy of the entire light-duty vehicle fleet. One of the unnoticed consequences of the low car sales of the last several years is that the US fleet has been aging faster, notwithstanding the small blip from the Cash-for-Clunkers program of 2009. The difference between sales of 16 million a yar versus 12 million is an average turnover of 15 years, instead of more than 20, and faster turnover should translate to quicker improvements in average mpg.

For years we heard that the biggest obstacle to improving the fuel economy of the US car fleet was the auto industry, which only wanted to sell us big SUVs that carried higher profit margins. That excuse was always overly simplistic, and it has been relegated to the ash heap by a new generation of cars and light trucks featuring innovations delivering steadily improving efficiency, even in mainstream sedans and SUVs. Getting the entire fleet to 54 mpg won't be easy, but if what I saw at the D.C. auto show is any indication, the attainment of that goal now depends at least as much on sales mix as on the availability of efficient models. Within a few years, virtually every segment of the market will include hybrid, diesel and EV options that will put a big dent in both fuel bills and emissions, albeit at the expense of higher sticker prices. That means that future fleet mpg will likely be determined mainly by the decisions of consumers, rather than carmakers.

Breaking Our Oil Addiction

In an article in today's Washington Post an official of the National Wildlife Federation was quoted linking rejection of the Keystone XL pipeline with breaking our addiction to oil. Even with the administration apparently having delayed its decision on the project until 2013--quite possibly killing it--this point merits further exploration. Just how might we go about breaking that "addiction", and when could we reasonably expect the task to be accomplished? As with everything else to do with energy, the answers to those questions must be based on facts and figures, rather than wishfulness.

The brief quote and its context imply that a decision to forgo additional supplies of oil from Canada or any other source would, by itself, move us significantly closer to breaking our addiction to oil, a rather vague phrase brought into common usage by President Bush's 2006 State of the Union address. Of course if delaying or rejecting the pipeline only results in continued or additional oil imports from other countries, that would be counterproductive from an energy security standpoint, and perhaps even from an environmental perspective. Ending our oil addiction requires more than just a real or artificial supply constraint; it calls for enormous quantities of energy from other sources, mainly for transportation, along with significant improvements in the efficiency with which we use that energy. How soon should we expect such a transformation?

Start with electric vehicles, which are essentially the only pathway by which renewable electricity sources like wind, solar and geothermal power would have any impact on our oil consumption, because less than 1% of US electricity is now generated from oil. Even if EVs turn out to be the long-term solution to our transportation needs, as I suspect, it will be many years before they can displace enough fuel demand to make a dent in our oil addiction. The current goal is to have a million EVs on the road by 2015. As ambitious as that target seems compared to current sales of less expensive hybrid cars, that would constitute just 0.4% of the 238 million cars and light trucks in the US as of 2008. Moreover, even if EVs replaced cars of only average efficiency, one million of them would displace just 31,000 barrels per day of gasoline. In other words, it would take more than 20 million EVs to save the volume of oil that the Keystone Pipeline could have delivered annually.

If we want to kick our oil habit quicker than by waiting for a hundred million EVs to turn up, we'll need an energy source that's compatible with the vast majority of existing cars, and the ones like them that will probably dominate new car sales for some time. Consider ethanol, our largest and most successful alternative energy initiative so far. Through August, ethanol accounted for 9.2% of 2011 US gasoline consumption, nearly four times its contribution in 2005. However, before we could use a lot more ethanol in our cars, in the way Brazil has, we would need to overcome some big hurdles. Raising the proportion of ethanol in gasoline above 10% creates logistical and reliability problems, and the flexible fuel vehicles that can run on nearly pure ethanol are relatively scarce. In addition, we would need to produce most of the incremental ethanol from a feedstock other than corn. With the latest disappointing crop forecast from the US Department of Agriculture, ethanol production will consume about 41% of this year's harvest. Whether or not that's already enough to cause major food vs. fuel concerns, doubling corn use for ethanol would clearly push corn prices up drastically and cause ripple effects throughout the global food economy.

The good news is that biofuels--including better fuels than ethanol--can be produced from a wide variety of non-food crops, along with their efficient production from sugar cane in the tropics. The bad news is that with the exception of cane ethanol, none of these has been demonstrated on anything close to the scale required. Two of the largest cellulosic ethanol projects under construction, POET's Emmetsburg, Iowa project and the Vero Beach, FL facility of INEOS Bio, will together be capable of supplying just 0.02% of US vehicle fuel needs. And until these plants are up and running, their owners won't know whether their economics are sufficiently favorable--even with the current $1.01 per gallon cellulosic tax credit--to provide a basis for building more and larger versions. Although some of the many competing processes for producing biofuels from non-food biomass including wood, waste, dedicated energy crops and algae look very promising, they all face major uncertainties in development and scaling-up, including the scale-up of their supply chains, and none is yet ready for prime time. That might still be the case ten years from now.

Of course there are many other fuels we could put in our cars, after some modifications, including methanol, compressed natural gas (CNG), liquefied natural gas (LNG) or possibly even ammonia. However, the production of all of these, aside from a relatively small amount of landfill gas, is currently based on fossil natural gas, and all would require major investments in infrastructure and/or vehicle fleets. For that matter, 78% of the energy content of corn ethanol comes from natural gas and other fossil fuels--it also consumes enormous quantities of water--and most of the incremental electricity consumed by the first EVs will likely be generated from gas.

Although it appears that we have ample resources of natural gas to expand its use beyond current demand, I'm not sure that's quite what environmentalists have in mind when they talk about breaking our addiction to oil. And so far we've only considered alternatives to gasoline, without factoring in the significant demand for petroleum products for moving goods by truck, train and ship, along with aviation fuels, lubricants and many other products. Together, they account for as much oil as we use in cars, with non-oil alternatives for most of them at an earlier stage than for gasoline. And while energy efficiency measures, including the substantial improvements in vehicle fuel economy that are possible on a technology-neutral basis--including shifting cars to fuel-efficient diesels--can help to reduce the size of the mountain we must climb, they can't turn it into a valley.

Taking all these considerations into account it's not realistic to imagine that we could break our addiction to oil to any great extent for at least another decade. In the interim, we should certainly pursue all options that could alter the feasibility of such a shift in the years ahead, in a manner consistent with the fiscal constraints we face. I'm also not oblivious to what that implies for greenhouse gas emissions and climate change, though I would point out that our use of oil in transportation is neither the worst emissions offender, nor the easiest high-emitting segment of the US energy economy to tackle in that time frame. In the meantime, we are committed by virtue of scale, infrastructure and fleet requirements to burn many billions of barrels of oil over the next few decades, from wherever they may come. In that light, the administration's decision on the Keystone XL pipeline could prove to be a costly misstep, no matter how much political pressure they were under to withhold approval.

Addendum: Bloomberg has put out an interesting post-decision editorial suggesting that there's no reason for the review of an alternate pipeline route to take as long as the State Dept. has indicated.

US Energy Poll Reveals Contradictions

Yesterday I received a press release announcing the results of a new poll on US consumer attitudes towards energy conducted by the McCombs School of Business at the University of Texas in Austin. I wasn't surprised to see that a plurality of the poll's respondents thinks the country is headed in the wrong direction on energy--triple the proportion that think we're on the right track--and many expect the situation to get worse in the next 25 years. That meshes with numerous readings on Americans' views of the overall economy. The poll also showed consumers broadly dissatisfied with the job that government and industry are doing in this regard, though the renewable energy sector, along with engineers, scientists and academia received somewhat better marks. At the same time, the results on several questions either contradict current consumer trends or reveal a poor understanding of energy market influences. Perhaps the most reassuring finding was that less than a quarter of consumers consider themselves knowledgeable on energy, while a large majority is interested in learning more.

The main question that grabbed my attention concerned consumers' "expectations for adopting new technology." 38% reported they were likely to use smart meter technology within the next five years, 30% said they were likely to own a hybrid car, and 21% were likely to install solar panels on their homes. On the face of it, these should be very encouraging results for the renewable energy and advanced vehicle sectors and those who invest in them. At the same time, it's hard to square these figures with the actual adoption rates for such technologies in the marketplace.

Consider hybrids, which have lost most of their novelty in the last decade, with cumulative US hybrid car sales standing at just over 2 million at this point. That's less than 1% of total US light-duty vehicles (cars, SUVs and light trucks), but it's still impressive, considering they started at essentially zero in the late 1990s. The problem is that even now, with practically every major carmaker offering at least one hybrid model, and several fielding an entire range of hybrids, 2011 sales have averaged just 2% of total US car sales of 9.5 million through September, based on figures compiled by hybridcars.com. Add plug-in electric cars like the Chevrolet Volt and Nissan Leaf and you get to 2.1%. Even before hybrid supplies were constrained in the aftermath of the earthquake in Japan, advanced vehicle sales never topped 3% in any month of this year.

The poll provides few insights into why the actual "take rate"would amount to less than a tenth of those with favorable attitudes towards buying a hybrid. However, it does suggest that the standard explanation that gas prices just aren't high enough yet is out of step with how consumers view those prices. Fully 95% of respondents described gas prices as either "very high" or "somewhat high", and 78% expected them to be somewhat or significantly higher in six months. One possible conclusion is that despite coming in compact, SUV, truck and luxury flavors, hybrid technology still doesn't deliver the value and/or performance most consumers are seeking, even if they're receptive to it in the abstract.

Then there's the even more dramatic disconnect on solar power. If 21% of single-family dwellings in the US were to install rooftop solar panels of 3 kW or more in the next five years, that would equate to at least 228 GW of solar power--about 90 times current US installed capacity--for average installations of 46 GW per year, or nearly three times the amount installed globally last year, mostly in Europe. As of the end of 2010, there were 153,000 grid-connected PV systems in the US, including commercial and utility installations. Even if all of them were on the rooftops of homes, that would still amount to just a 0.2% market penetration. Although PV prices are coming down rapidly and sales could approach 2 GW in 2011, this divergence between sentiment and sales suggests that a lot more Americans like the idea of rooftop solar than are actually willing to invest in buying (or leasing) it at this point.

Whatever the UT poll results indicate about the potential medium-term market share of new energy technologies, they provide a data point that Americans view energy as another important issue they believe government is getting wrong. They also highlight the need and opportunity for more education on how energy markets really work, with supply constraints and growing demand actually having a much bigger impact on energy prices than the limited pricing power most energy companies enjoy.

The Next Big CAFE Loophole

The great pitfall of government policies, no matter how well-intended they might be, is their inevitable unintended consequences. When those are truly surprising, it's hard to attach much blame to the legislators or regulators involved. However, that degree of indulgence shouldn't apply when the unintended consequences are as obvious as the ones inherent in the new fuel economy regulations that were announced with such fanfare last week. After all, an earlier generation of CAFE standards gave rise to what might just be the classic unintended consequence of recent times: the "SUV loophole" that fed a 20-plus-year SUV fad and dug the nation's oil consumption hole much deeper than it needed to be, affecting oil prices, trade deficits and energy security. Now regulators are proposing the creation of a similar loophole for electric vehicles.

I'm not surprised that the coverage I have read on the latest CAFE debate didn't remind the public of the ongoing consequences of treating pick-up trucks and delivery vehicles differently than passenger cars when the first CAFE standards were established in the 1970s. (That loophole was mostly closed just a few years ago.) Who could have guessed that a provision intended to help small businesses would blow up, because an entire generation embraced deluxe versions of such vehicles as their primary transportation--by the tens of millions--undermining the purpose of the CAFE standards to reduce gasoline demand? When I looked at this several years ago, I estimated that SUVs had increased US gasoline consumption by over 400,000 barrels per day, or roughly 5% of total demand, equivalent to the energy contribution of around 10 billion gallons per year of ethanol.

In this case the problem starts with the evolution of Corporate Average Fuel Economy standards from a tool intended solely to improve US energy security by reducing the consumption of petroleum products in transportation, to one encompassing the greenhouse gas emissions implicated in climate change. Although there are important overlaps between these two goals--keeping a chorus of pundits employed touting them--they are not identical in operation or effect. Consider the specifics of the new CAFE proposal.

The "supplemental notice of intent" from the National Highway Traffic Safety Agency (NHTSA) of the Department of Energy, the body that along with the EPA designs and enforces the CAFE standard, spells out the special treatment accorded EVs in the rules that will be forthcoming. It states that EPA intends to give manufacturers multiple credit for each EV, plug-in hybrid (PHEV) and fuel cell vehicle they sell, starting at a multiplier of 2.0 for EVs and fuel cells and declining to 1.5 by 2021, as if these cars somehow canceled the emissions of more than one vehicle. They also intend to treat EVs and the electric portion of PHEVs as having zero emissions, regardless of how the power they use is generated. So in order to meet the tough greenhouse gas standards that accompany the 54.5 mpg CAFE standard, carmakers will have every incentive to produce as many EVs they can. Unfortunately, it's not obvious that this will reduce emissions in the real world, except in the rare instances when EVs recharge exclusively from renewable or nuclear power, which provide only 30% of our electricity mix today, up from 28% in 2005.

One needn't assume that EVs might be recharged using only coal-fired power to see that they aren't always a big improvement, emissions-wise, over non-plug-in Prius-type hybrids or clean diesels. Using the average US grid CO2 emissions of around 1.3 lb/kWh, a Nissan Leaf getting 3 miles per kWh is responsible for the emission of roughly 200 grams of CO2 per mile traveled. By comparison, a 2011 Prius with its 50 mpg EPA average emits around 196 g/mi. A more rigorous comparison would require a full well-to-wheels lifecycle assessment, but that is precisely what the new CAFE rules eschew in the interest of leaning on the scales to help today's preferred vehicle technology.

Subject to further refinement, this back-of-the-envelope analysis suggests that skewing the new CAFE regulations in favor of EVs isn't going to do much to reduce greenhouse gas emissions. Its main advantage is in reducing oil consumption, since less than 1% of our electricity is generated from oil. But if we only cared about oil and not emissions, producing gasoline from domestic coal--in the same manner as a sizeable fraction of South Africa's fuel supply--would be equally effective at backing out oil imports. Meanwhile, a gallon of gasoline saved by an advanced internal combustion engine with stop-start technology and other low-cost efficiency features would be worth exactly as much as a gallon saved by an EV, while costing dramatically less. That's especially true when you factor in the $7,500/car EV tax credit, which I can't help thinking will be a prime target when the joint Congressional committee on deficit reduction established by the debt limit bill passed by the House of Representatives last night and by the Senate just a few minutes ago sets up shop this fall.

The unintended consequence that is easily envisioned from this special treatment of EVs is a massive over-investment in a particular and still very expensive vehicle technology, at the expense of other, less costly and more cost-effective technologies. I certainly accept that EVs represent a major long-term trend in cars, but I don't believe that their development requires fiddling with the CAFE rules in this way. Nor is it obvious that US manufacturers enjoy any particular competitive advantage in producing EVs, which depend on ingredients such as rare earths for which we are even more import-dependent than for oil. If saving oil and emissions is what we really care about, then we are entitled to expect that new fuel economy regulations would focus squarely on those outcomes, without being diverted by the industrial policy fad of the moment. Perhaps this will be one of the topics taken up by the House Oversight and Government Reform Committee of the Congress as it investigates the new CAFE rules.