Hi Larry, So no MPPT in that situation and how much extra Vmp on the PV’s is recommended above operating battery Voltage?
Thanks, Jason RemoteEnergy.org <http://remoteenergy.org/> > On Jul 1, 2021, at 2:18 PM, [email protected] wrote: > > Just thought I would throw out that with an Elite Power Solutions Li-ion > battery system you can connect a PV solar source directly to the battery, no > PV controller needed. The EMS will monitor each cell and open the charge > relay when the battery is full. The dual solenoid controller will allow loads > to operate uninterrupted. > > Use a DC down converter to share power to the 48V battery or loads. > > Larry Crutcher > Starlight Solar Power Systems > > > > > On Jun 30, 2021, at 1:50 PM, Dave Tedeyan <[email protected] > <mailto:[email protected]>> wrote: > > Hi All, > > I am going to be working with someone who plans to completely electrify a > boat. The electric motor is meant to run on nine 12V batteries, or 108V. The > motor manufacturer recommends a charger that can run on 120V or 240V. But has > anyone seen a charger that can take solar power and directly charge a battery > bank of 108V? The alternative that I see here is to have two separate battery > banks, one for the motor, and one for house loads. Then we would have the > solar charge a 48V battery bank, and then use an inverter to charge the 108V > battery bank. It seems inefficient, although that may be the only choice. > > A separate but related question: what is special about a marine inverter? If > there is a 5kw charger for the battery bank, we will need a large inverter to > handle this plus other AC loads, and I am not sure if there are "marine" > inverters this large. And so other than concerns about getting wet, is there > harm to putting a Radian, or a Sol-Ark on a boat? > > Cheers, > Dave > > -- > <https://www.sungineersolar.com/> > Dave Tedeyan, P.E. > Owner | Sungineer Solar > p: he | him | his > a: 1653 Slaterville Rd. | Ithaca, NY 14850 > w: www.sungineersolar.com <http://www.sungineersolar.com/> > c: (607) 288-2898 > <Elco EP-70 datasheet.pdf>_______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > <http://re-wrenches.org/> > > List Address: [email protected] > <mailto:[email protected]> > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > <http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org> > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > > > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org >
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