Just to clarify... ALL GT inverters use MPPT tracking which means they will produce maximum AC current into the grid at its maximum rated capacity at all times (up to what the solar panels are currently producing). GT inverters are *current sources* that will push that current into the load (grid) no matter what. (Which is also why they shut down on loss of grid because if the grid load cannot take it (loss of grid) then the voltage would soar to infinity. Hence the inverter shuts down.
It was not clear if the discussion was for a GT or off-grid inverter, but I thought I'd clarify. Bob -----Original Message----- From: EV <ev-boun...@lists.evdl.org> On Behalf Of Peri Hartman via EV Sent: Wednesday, May 27, 2020 3:43 PM To: Electric Vehicle Discussion List <ev@lists.evdl.org> Cc: Peri Hartman <pe...@kotatko.com> Subject: Re: [EVDL] : V2g for DIY EV's Why is this an inverter problem ? If there's no load, then there's no current through the inverter. I'm not sure what the effect is on the solar cells, themselves, but it seems that's where the problem ends up. Regardless, I assume it is not too bad for the cells since they have to be designed to produce current sometimes and sometimes not, even while in full sun. Peri << Want to know about the effects of leaf blowers ? https://quietcleanseattle.org/ >> ------ Original Message ------ From: "Willie via EV" <ev@lists.evdl.org> To: ev@lists.evdl.org Cc: "Willie" <wmckem...@gmail.com> Sent: 27-May-20 12:10:32 PM Subject: Re: [EVDL] : V2g for DIY EV's > > >On 5/27/20 1:01 PM, Jay Summet via EV wrote: >> >> >>On 5/26/20 10:55 PM, Alan Arrison via EV wrote: >>>Sounds dangerous and possibly illegal. There is no inverter that can supply the actual power you are using and not back-feed the grid. >>> >> >>It is technically possible, all you would need is a current sensor on the main house feed. If the current is going in, your inverter would start adding current to the house wiring until the current flow reached zero. With modern electronics you could react very quickly if the draw dropped (current flow started to go negative) and essentially never backfeed the grid. > >BTW, I believe someone mentioned that the not produced power when an inverter "cuts back" must be dissipated somewhere as heat. I don't believe that is the case; I believe the inverter can just not produce the available power with no heat generation. > >_______________________________________________ >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) _______________________________________________ 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)
