I was going to say that an inverter that cannot backfeed the grid is an enormous economic waste of investment because when one is generating say, 8 kW during mid day and one's house is only drawing say 400 Watts, then the rest of the 8kW solar investement is giving NOTHING for its value. Even with a whole house battery system, once the batteries are fully charged say, in the spring and fall and the load is light) then again, the 8 kW is going nowhere.
There simply is no economic advantage to solar at home (in most cases) unless one is grid tied and having the grid for unlimited free storage. Then it is worth its weight in gold (er... aluminum)... But then I read that you are charging your DIY EV's and so you DO have a place to dump it. But again, only if they need a full charge every day. On days when they are full and your house is not u sing much, then again, the solar investment is providing little return on its investment. And NO battery system can store the double-summer-excess power for later use in the winter. Only grid-tie can do that. Bob, WB4APR -----Original Message----- From: EV <[email protected]> On Behalf Of Steve Clunn via EV Sent: Tuesday, May 26, 2020 7:49 PM To: [email protected] Cc: Steve Clunn <[email protected]> Subject: [EVDL] : V2g for DIY EV's The inverter I'm using actually claims to not back feed to the grid but only to supply power that one is using personally. In the ad they describe the meter running backwards and people getting charged for giving electricity so they understand the situation . I'm not sure I believe this claim because detecting what the house is using and what's going to the grid does not seem easy without something monitoring the power going out of the house. I can turn everything off in the house and see. The grid tie inverter that I'm using can run on batteries and I'm using it in the 96 volt mode which goes up to about a hundred and thirty volts. In maximum power point tracking mode it goes up to 180 volts. I have three cars wired up with 30 cells leaf and Tesla batteries. They all plug-in together in parallel , solar panels , tie inverter and three cars. The BMS of each car will shut off if the voltage gets too low or high and take that one car out of line. In general I use about 10% of a car's charge at night. It's been running about a year now but it constantly changes. At one time I talked to the utilities about getting a different meter but it was a little expensive and it's how I came up with this idea that I'm using now. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20200526/ad3516 32/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) _______________________________________________ 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)
