It has to be big enough and light enough and aerodynamically sound. The
formula is 850 pounds and 1.5kw battery and a 1.5kw solar panel. CD of .16.
Lawrence Rhodes
On Saturday, July 11, 2020, 7:18:26 PM PDT, Robert Bruninga
<bruni...@usna.edu> wrote:
When I put a small flat 4'x6' utility trailer on my Prius, the mileage went
from 55 down to 40! And that was with no load or added wind drag other than
the trailer.
So it is quite silly to think one can add a trailer to get SOlar without losing
more in the trade!
Bob
On Fri, Jul 10, 2020 at 12:17 PM paul dove via EV <ev@lists.evdl.org> 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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