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Re: (ET) Fwd: [EVDL] The Case for the Electric Tractor
David, I agree. I think there are some PV technologies in the high
teens for efficiency, but these are for satellites and other
price-is-no-object applications, not for commercial grade product.
My sense is that battery amortization may not be quite as big an issue
for the tractors as for on-road EVs. Current draws are not usually as
high. The ETs seem to have batteries that last more than a decade. My
on-road EVs seem to get about 4 years.
Anyway, my main reason for posting was to let other electric tractor
enthusiasts know that the technology is getting some mention in the
David Roden wrote:
On 24 Aug 2007 at 15:11, Darryl McMahon wrote:
solar panels are the most efficient way of converting
radiant sunlight energy into electricity (approaching 20% vs 1% or
much less for plants).
Where do they get this number? I think I've read that mass-produced PV is
around 10% efficient at normal operating temperatures.
I may have missed it, but they also don't seem to have figured battery
amortization into the operating costs. For road EVs, this is the largest
contribution to per-mile expense, and I'd bet that this will also be true
for an electric tractor in daily service.
I'm not saying they're wrong or that they shouldn't explore this option.
Far from it! It's just that I think we as EV fans hurt ourselves when we
aren't realistic about the utility and costs of electric transport.
David Roden - Akron, Ohio, USA
It's your planet. If you won't look after it, who will?
The Emperor's New Hydrogen Economy (now in print and eBook)