Hi Eric,
The rule of thumb I've been using is 4 to 5 hours of the peak rated output per day in mid-lattitudes. That's averaged over the whole day of course. Sunpower's 315W panel has about the best ratings of any I've seen at 18W per square ft. My assumption was 14x40 or 560 sq. ft. Times 18= 10,080W. Times 5 = 50.4KWH per day. I realize my math is rough and I'm probably being optimistic, but unless I'm missing something big that's a significant amount of power.
Check out "NREL" for the solar calculations.
Jim McMillan
> > >
> > > --- In electricboats@yahoogroups.com, "Eric" <ewdysar@> wrote:
> > > >
> > > > as working example of how one can less dependent on fossil fuels onboard. Given the reported performance of other fixed installation solar panels, getting 50% the rated capacity seems to be about as good as it gets. So, on a good day (in the middle of the day) you might be able to get about 1500W (2hp) going towards your batteries/drive system.
> > > >
> > > > Just some extra considerations....
> > > >
> > > > Fair winds,
> > > > Eric
> > > > Marina del Rey, CA
> > > >
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