Again, if you find a 72v UPS (6 12v batteries) then you can tap your arrays in groups of three and use that to provide the current to the UPS to dirive your car charger. Just 9 panels in 3 parallel strings of 90v will give maybe 20 amps (or the minimum needed to charge L1) But 12 panels (or about one string array) will give you plenty of current over more hours of the day. That's why I like string inverters beccause I have access to all the DC inputs and ground mount so I can get to them any time I want.
Bob On Sun, Sep 1, 2019 at 1:20 PM Robert Bruninga <bruni...@usna.edu> wrote: > You already have what you need for continuous operation at night in the 1 > kW class (refrigerator, well pump and lights, etc) > See http://aprs.org/powerwheels.html > > But it assumes you have the Sunny Boy GT inverter with "secure" power when > the grid goes down to charge your EV. $1500 > Or if you are lucky to find a UPS of at least 1800W capacity to charge the > car, and then you can drive that from batteries that you charge from > voltage taps on y our DC array that match the input voltage of the UPS. > But ONLY if you seriouisly know what you are doing and do not overcharge > the intermediate battery., etc. > > Bob > > On Sun, Sep 1, 2019 at 12:28 PM Damon Henry via EV <ev@lists.evdl.org> > wrote: > >> I know there has been a lot of churn the last few years over Vehicle to >> Grid technology. I'm not sure how many people really want the utilities to >> take over their vehicle state of charge, so I'm not sure how viable the >> whole concept is. >> >> With my grid tied solar system my solar stops producing if the grid goes >> down. One way to prevent this is to have a battery backup system in >> place. That's usually an investment of at least several thousand dollars. >> >> I have two factory OEM PHEVs sitting in my driveway with significant >> battery packs. I also have a Juicebox 40 for charging which has some >> charging intelligence already built into it for their Juicenet program, but >> not really V2G. I feel like I am tantalizingly close to a great solution. >> >> So here is the question that I have. How far am I from being able to >> utilize my car batteries through the OEM port and an EVSE charger, to feed >> an inverter and keep my house alive and my solar producing during a power >> outage? Is this tech currently being developed, or is it still just a >> dream that my come true some day? >> >> BTW - I have lived in my house for 20+ years and rarely lose power, but >> "being prepared" is always on my agenda. I suspect that if I really want a >> solution within the next couple of years I will need to buy a separate >> battery for my solar system, or a generator... >> >> thanks >> Damon >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: < >> http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20190901/f59128c8/attachment.html >> > >> _______________________________________________ >> UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub >> ARCHIVE: http://www.evdl.org/archive/index.html >> INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org >> Please discuss EV drag racing at NEDRA ( >> http://groups.yahoo.com/group/NEDRA) >> >> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20190901/4c1e29e4/attachment.html> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/index.html INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
