I commonly get much better range. My indicator of accumulated data says 4.9
miles per kwh. Your mileage may vary. Lawrence Rhodes
On Friday, July 10, 2020, 9:50:10 AM PDT, Tom Mandera <t...@tmcom.com>
wrote:
Assuming the 24kwh battery Leaf goes 80 miles, that's 3.3 miles / kwh or
0.3kwh/mile or 300wh / mile.
80miles / 24kwh = 3.3 miles /kw or 1/3.3 kwh per mile.
Assuming a linear consumption (which is wrong - ignoring increased drag at
speed, but convenient) that means at 55mph, traveling 1 hour, we need 16.5kwh
of juice.
or 16,500w of solar to equal the consumption.
So the 12kw figure was on the low side, even assuming a linear consumption.
Unless I fouled up the math again. :)
On 7/10/20 8:07 AM, paul dove wrote:
That math seems wrong to me. 3200 Wh at 25Wh/m = 12.8 miles not 1 mile.
On Friday, July 10, 2020, 8:22:02 AM CDT, Tom Mandera via EV
<ev@lists.evdl.org> wrote:
There are 400w panels out that are roughly 7'x3.5' So a rather
reasonable 7'x7' trailer could produce 800w, which is a good amount of
power - but not nearly enough.
Assuming they're mounted flat, that's 800w at high noon, and less at
every other part of the day. We could expect something like 3.2kwh /
day of production, or roughly a 1 mile extension in range.
To get the 12kw needed, we need at least 15 times that, or 105' long
trailer, 7' wide. Then we could drive continuously at around the noon
hour for around an hour, on a good sunny day.
Sadly, as you said, it's a math problem..
On 7/10/20 12:21 AM, Lawrence Rhodes via EV wrote:
> The math problem here is consumption over time. A solar racer with a 5
> passenger capacity 850 pound weight with a coefficient of drag of .16
> rolling on moped wheels with a 1.5kw panel and 15kw battery can attain 45mph
> continuously without using battery power. A Nissan Leaf going 55mph
> achieving 5 miles per kwh would(if I got my math right) need 12kw
> continuously to keep that speed in full sunlight. Of course the battery is
> a buffer that will allow you to do faster speeds and climb hills. I suspect
> some sort of Pop tent trailer might be a good combination for the Cyber
> Truck. 450.5 sq. ft. is the maximum size of a trailer. A pop tent that size
> would be quite a mansion. However that might only produce 5 to 6kw. Enough
> to charge and extend but not to run continuously. Weight must be reduced
> and coefficient of drag lowered. It's a math problem. Lawrence Rhodes
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