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 <[email protected]> On Behalf Of Mark Laity-Snyder via EV Sent: Friday, July 12, 2019 3:55 PM To: Electric Vehicle Discussion List <[email protected]> Cc: Mark Laity-Snyder <[email protected]> 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)
