I haven't looked closely at this, but panels with on board micro-inverters are nice because you can buy one now, buy another one later, etc., until you have the kW you want. They output 120VAC. Seems like a good way to support an EV, or at least cover some of the charging with solar.
I suspect that trying to have home EV charging all from solar, is the same problem as running a home with all solar - it really drives up cost planning for peak demand, and dealing with cloudy days - fi you are going to store a large excess that is going to be a a lot of batteries. It makes a grid tied system the economically pleasing choice. You can grid tie micro-inverter panels. <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> Virus-free. www.avg.com <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> On Fri, Jul 12, 2019 at 4:18 PM Robert Bruninga via EV <ev@lists.evdl.org> wrote: > Yes, But of course, solar can only charge the EV during the day. The > simplistic approach using off-the shelf components would need a minimum of > 2 kW of solar panels (8 or more) to be sure tha most solar days could > produce the absolute minimum of 1.5 kW which is the minimum standard 120v > EV charge cord. > > But then you have to go from the DC solar panels at 30v or so to the 120 > VAC needed by the standard charge cord. To do that, you need a DC solar > battery charge regulator, then a small 24 volt battery (to smooth the > energy) to drive a 2 kW 24votl AC inverter. Then you plug the car charger > into that. > > And you have to have a low-voltage cutout circuit so you don't run the 24v > battery down when the clouds come oue, etc... > > So as you can see, it is a kludge of off-the-shelf items because no one > has yet built a consumer device to take direct Solar DC and handle all > these functions to deliver stable power to the car. > > If that property has the grid to it, it makes no sense to ever consider > going off grid. Because with a net meter you have 100% free solar > storage. And for a remote vacation property that is only occupied say 10% > of the time, then you only need 10% of the solar panels because those 10% > can be storing months worth of power in the grid (via the net meter) that > is available to your instantly anytime you visit the house. > > Off grid makes zero economic sense if the grid is available. But if the > grid is not available, then off-grid is the only way to go, BUT the solar > array has to be X times bigger to accommodate the full power needed in the > single worst day need. Where as with grid tie, a much smaller set of > panels can be stroing a yeaers worth of sunshine in the grid for free that > you can draw out at any time and at ANY rate... Up to the maximum capacity > of the grid-to-the-house. > > Bob, WB4aPR > Author http://aprs.org/Energy-Choices.html > > -----Original Message----- > From: EV <ev-boun...@lists.evdl.org> On Behalf Of Mark Laity-Snyder via EV > Sent: Friday, July 12, 2019 3:55 PM > To: Electric Vehicle Discussion List <ev@lists.evdl.org> > Cc: Mark Laity-Snyder <marklai...@yahoo.com> > Subject: [EVDL] Solar off grid with an EV? > > Hi all, > > Would it be possible to hook a small solar panel system to an EV and use > the EV as the battery storage for an off grid solar system? What would be > needed to make that happen? I envision solar panels connected to > microinverters which would then charge the EV. Then if you needed power > at night, you could use some power from the EV. Would that work? Would > you need another part to that puzzle to get it to work? Would it cause > problems for the EV? > > I am not looking to do this myself but we had a guy come and charge his > Tesla at our place. He has a lot and camper where he goes camping and > would like to install solar and be off grid. I was just wondering what > that setup would look like. > > Mark. > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Please discuss EV drag racing at NEDRA > (http://groups.yahoo.com/group/NEDRA) > _______________________________________________ > UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub > http://lists.evdl.org/listinfo.cgi/ev-evdl.org > Please discuss EV drag racing at NEDRA ( > http://groups.yahoo.com/group/NEDRA) > > -- Michael E. Ross (919) 585-6737 Land (919) 901-2805 Cell and Text (919) 576-0824 <https://www.google.com/voice/b/0?pli=1#phones> Tablet, Google Phone and Text -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20190712/a1d890f4/attachment.html> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
