[RE-wrenches] Tesla Powerwall 2.0 - Experience?

[Ray]

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 <hiltondier at gmail.com 
> <mailto:hiltondier at 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 at lists.re-wrenches.org
>     <mailto:RE-wrenches at 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
>     <http://www.re-wrenches.org/etiquette.htm>
>
>     Check out or update participant bios:
>     www.members.re-wrenches.org <http://www.members.re-wrenches.org>
>
>
> _______________________________________________
> List sponsored by Redwood Alliance
>
> List Address: RE-wrenches at 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
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches_lists.re-wrenches.org/attachments/20200719/d2f49e82/attachment.htm>