I second what Ray says Jerry On Sun, Jul 19, 2020, 12:49 PM Ray <r...@solarray.com> wrote:
> There are so many really good Li Iron Phosphate Batteries available, that > are actually designed for off grid, that I don't see any advantage to using > a more unstable chemistry that is not designed for off grid. AC coupled > is a 2nd huge no no for off grid, and can leave an unattended system > completely inoperable. Anytime the main battery inverter shuts off for any > of several reasons: overload, overtemp, low battery, etc., it also means > that all charging of the system ceases as well. > > For Off grid, reliability is absolutely #1, and owner safety is directly > related to that reliability. They can lose water, heat, refrigeration, and > communications in an outage. I'm just tired of folks dabbling in off > grid, and not taking it seriously. Why in the world would someone even > consider using a product that its own manufacturer says should not be used > off grid? > > Ray Walters > Remote Solar > 303 505-8760 > > On 7/19/20 10:54 AM, Jerry Shafer wrote: > > Hilton, Wrenches > As I recall Tesla does not recommend their battery for off grid > applications, they need to be connected to the internet and without that > there may be warranty issues. I don't think that the off grid world and > daily cycling would work well over time either. How would you jump start > the power wall if it died do to low voltage cut out, a genny might work if > it connects and stays connected this might also affect the warranty. > Jerry > NABCEP PV inspector > > On Sun, Jul 19, 2020 at 9:02 AM Hilton Dier III <hiltond...@gmail.com> > wrote: > >> Greetings, Wrenches, >> >> I have an off-grid client who has been reading the buzz about the Tesla >> Powerwall 2.0. I have been reading the data sheets and manual for it and it >> appears to be AC coupled only. There was talk of a DC input version, but >> apparently that fell by the wayside. I try to be agnostic about technology, >> and I'd be willing to subcontract a Tesla-approved installer if, in fact, >> this was the best solution. >> >> Does anybody have experience using the Powerwall 2.0 in an off grid PV >> system? Is it AC coupled only? Can it take generator power without barfing? >> What is the lead time on these? >> >> Many Thanks, >> >> Hilton >> >> -- >> Hilton Dier III >> Missisquoi River Hydro >> Renewable Energy Design >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> >> > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & > settings:http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette:www.re-wrenches.org/etiquette.htm > > Check out or update participant bios:www.members.re-wrenches.org > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > >
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