Hummer versus Prius
Hybrid Synergy View Newsletter September 2007
Some readers of Hybrid Synergy View say they've heard about a report that claims a Hummer H3 sport utility vehicle uses less energy per mile driven than a Toyota Prius sedan. Not surprisingly, Prius fans who take pride in their cars' energy efficiency are confused by this claim.
The report, published earlier this year by CNW Marketing Research, Inc., is titled "Dust to Dust: The Energy Cost of New Vehicles From Concept to Disposal." It is said to measure in dollars and cents all the energy used in creating, building, operating and disposing of each vehicle over its entire lifetime. The report says a Prius costs $3.25 per mile to operate, versus just $1.95 a mile for the Hummer H3. In May, a response from the Pacific Institute said of the CNW report, "The little supporting evidence that it has released suggests that the contentions in the report are, at best, unproven, and are likely wrong: the result of faulty analysis, untenable assumptions, manipulation and misuse of facts and data, numerical mischaracterization, and inadequate review."
Plug-In Hybrids Hybrid Synergy View Newsletter Winter 2007
The idea seems simple enough: Just add a cord and a plug to a Prius so you can charge its battery on ordinary household electric current overnight. Then, use only the battery power to make the short round-trips to work, school or the store. That would save lots of gas, and the charging could be done mainly at night, when utility rates are cheaper. When driving longer distances, the engine kicks in and the vehicle operates on gasoline, much like today’s Hybrid Synergy Drive® vehicles. This inspiring idea has caught the public’s attention as an energy-security measure that uses domestic and potentially renewable resources. Not surprisingly, it has prompted questions to automakers about when the first commercial plug-in hybrid can be expected.
As the leading maker of hybrid vehicles, responsible for three out of four sold in the United States last year, Toyota receives many of these questions. Toyota believes plug-in hybrid vehicles are an appealing technology offering possibilities for energy diversity. Depending on electric power sources, they may offer reductions in both emissions and fuel consumption. Reaching this vision, however, will require breakthroughs in battery technology, including capacity, durability and cost. At present, plug-in hybrid vehicles are not commercially feasible. It’s about batteries An earlier edition of Hybrid Synergy View pointed out that much of the “magic” that makes hybrid vehicles work involves high-voltage battery technology.