114505Re: [toyota-prius] Re: Interesting tool
- Sep 2, 2009sidneybrooks wrote:
> And, by the way. The calculator used 0.25 kwhr per mile rather thanThe RAV4-EV is heavier and has more wind resistance than the Prius. Nimh
> 0.5 cited in my last message.
batteries are also less efficient than lead-acid batteries. So it makes
sense that the RAV4-EV has a lower energy efficiency than a Prius-size
EV (just as an gasoline RAV4 gets worse fuel economy than a gasoline Prius).
> There are obvious conclusions: 1) Electric vehicles are practical withI'd say they can be practical with any batteries. It mainly depends on
> NiMH batteries
the vehicle's "mission" (daily range needed, desired cost per mile,
battery life requirements, etc).
> 2) Improvements in batteries, including the switch to lighter weightLithium-based batteries are more efficient than nickel-based batteries,
> Li Ion, make 0.25 a reasonable number
and can equal or exceed the efficiency of lead-acid batteries. However,
since all batteries range from 70-90% efficient, efficiency is rarely a
> 3) Home generated solar power makes electric cars even cheaper to own.Solar power costs *more* than grid power (unless there are rebates or
tax credits to put a "thumb" on the scale).
Ring the bells that still can ring
Forget the perfect offering
There is a crack in everything
That's how the light gets in -- Leonard Cohen
Lee A. Hart, 814 8th Ave N, Sartell MN 56377, leeahart_at_earthlink.net
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