Huh? So are your saying you would not welcome a battery that lasts 10
times as long and only weighs 100 lbs just because your solar panels
suck? I don't really get your post.
Don
--- In electricboats@yahoogroups.com, "Steve" <sstuller@...> wrote:
>
> Having a lot of battery capacity and a high acceptance rate is secondary if you are offgrid and have to rely on solar panels. Sunlight delivers 1 KW per square meter to the earth's surface. Current panel efficiency is around 10%. That's 100 watts per square meter. Assuming 5 hours per day that's 500 watt-hours or 1/2 KWH per square meter. A 50 KWH battery bank would require one hundred square meters of panels to recharge the bank in one day. If you have an aircraft carrier you would have enough room for the panels. Otherwise you have to rely on the ICE if you want to recharge a a large battery bank in a short time. Thanks. Steve S.
>
> --- In electricboats@yahoogroups.com, "leemurs72" <jt.yahoo@> wrote:
> >
> > For those that are still a few years away from a battery bank purchase, this is possibly great news...
> >
> > http://www.northwestern.edu/newscenter/stories/2011/11/batteries-energy-kung.html
> >
> > Recent research shows promise for allowing a 10-fold increase in capacity and charge acceptance.
> > It would be nice to have a 50kWh battery pack that weighs just over 100lbs...
> >
> > If it pans out, the it is a "that changes everything" breakthrough.
> >
> > Happy sailing!
> >
> > /Jason
> >
>
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