Hi
Interesting debate and I think both parties have a point but the main point of it all must surely be that battery technology is progressing and panel technology too and that is in all our interests for personal reasons and for the health of the planet perhaps.
lets all remember that science and its discoveries normally take some time to percolate through to the real world of us mere mortals.
mark
From: Steve <sstuller@netzero.com>
To: electricboats@yahoogroups.com
Sent: Sunday, 20 November 2011, 19:18
Subject: [Electric Boats] Re: new lithium battery breakthrough?
To: electricboats@yahoogroups.com
Sent: Sunday, 20 November 2011, 19:18
Subject: [Electric Boats] Re: new lithium battery breakthrough?
I guess the point I'm trying to make is that your charging capacity is more important than your battery capacity especially when you are offgrid. Increasing your battery storage without a corresponding increase in charging capacity doesn't accomplish very much. A bigger gas tank in your car isn't going to make the pump at the gas station pump any faster. A high battery acceptance rate isn't useful if the solar panels can't provide the energy. Waiting for better batteries before investing in an electric drive diminishes the importance of other considerations in making the conversion. Thanks. Steve S.
--- In electricboats@yahoogroups.com, "Carel Ruysink" <c.ruysink@...> wrote:
>
> I also did not make the connection and BTW allthough I did not do the maths I do not believe that an aircraftcarrierdeck full of PV panels could produce the needed 300.000 SHP for an aircraftcarrier.
>
> Carel
> ----- Original Message -----
> From: Carter Quillen
> To: electricboats@yahoogroups.com
> Sent: Sunday, November 20, 2011 4:10 AM
> Subject: Re: [Electric Boats] Re: new lithium battery breakthrough?
>
>
>
>
> I'm glad to hear I wasn't the only one that didn't quite get this one.
>
> And for the record, somewhere around 13-14% is new benchmark for PV efficiency and it's cost is down to like $1.25 a Watt right now. And you don't have to have an air craft carrier for a solar powered boat. Pontoon boats, launches, trawlers and a host of other barge like vessels have plenty of room over their decks for a sufficient solar array to power them real time off solar alone. With the 3 kW I'm installing on my boat I'll get 60 amps at 48V whenever the sun is shining and I've got room for 2 more kW when I get the money. That will provide over a 100 amps at 48V.
>
> Having a backup generator for continuous night running and cloudy days is still a good idea but not absolutely necessary.
>
> Carter
>
>
> From: Don Parsons <tdparsons@...>
> To: electricboats@yahoogroups.com
> Sent: Saturday, November 19, 2011 9:04 PM
> Subject: [Electric Boats] Re: new lithium battery breakthrough?
>
> 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
> > >
> >
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
--- In electricboats@yahoogroups.com, "Carel Ruysink" <c.ruysink@...> wrote:
>
> I also did not make the connection and BTW allthough I did not do the maths I do not believe that an aircraftcarrierdeck full of PV panels could produce the needed 300.000 SHP for an aircraftcarrier.
>
> Carel
> ----- Original Message -----
> From: Carter Quillen
> To: electricboats@yahoogroups.com
> Sent: Sunday, November 20, 2011 4:10 AM
> Subject: Re: [Electric Boats] Re: new lithium battery breakthrough?
>
>
>
>
> I'm glad to hear I wasn't the only one that didn't quite get this one.
>
> And for the record, somewhere around 13-14% is new benchmark for PV efficiency and it's cost is down to like $1.25 a Watt right now. And you don't have to have an air craft carrier for a solar powered boat. Pontoon boats, launches, trawlers and a host of other barge like vessels have plenty of room over their decks for a sufficient solar array to power them real time off solar alone. With the 3 kW I'm installing on my boat I'll get 60 amps at 48V whenever the sun is shining and I've got room for 2 more kW when I get the money. That will provide over a 100 amps at 48V.
>
> Having a backup generator for continuous night running and cloudy days is still a good idea but not absolutely necessary.
>
> Carter
>
>
> From: Don Parsons <tdparsons@...>
> To: electricboats@yahoogroups.com
> Sent: Saturday, November 19, 2011 9:04 PM
> Subject: [Electric Boats] Re: new lithium battery breakthrough?
>
> 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
> > >
> >
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
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