The manuals I have say 7.6kW(AC) per PW2
Glenn From: RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> On Behalf Of Jason Szumlanski Sent: Friday, April 16, 2021 9:46 PM To: RE-wrenches <re-wrenches@lists.re-wrenches.org> Subject: Re: [RE-wrenches] Powerwall 2 AC PV regulation I think the limit is now stated as 7.6kw if memory serves me right. Jason On Fri, Apr 16, 2021, 12:11 PM Matt Partymiller <m...@sesre.com <mailto:m...@sesre.com> > wrote: They used to advocate 7.9kW AC/DC per Powerwall. That number may have gone down recently. Coupling an inverter on the line side of the backup gateway will resolve your issue of meeting homeowner demand. Tesla will want you to add a CT to that inverter to ensure it does not mess up their monitoring system, though that may already be incorrectly configured and not monitoring the whole home if the system is backup only. Matt Matt Partymiller General Manager Solar Energy Solutions, LLC Lexington | Louisville | Bloomington | Cincinnati | Evansville | Indianapolis 859-312-7456 (Office) 877-312-7456 (General) m...@sesre.com <mailto:m...@sesre.com> Check out our amazing new website and social media updates: www.sesre.com <http://www.sesre.com/> <http://www.sesre.com/> <https://www.facebook.com/SolarEnergySolutionsLLC> <https://www.instagram.com/solarenergysols> <https://twitter.com/SolarEnergySols> <https://www.linkedin.com/company/sesre> From: RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org <mailto:re-wrenches-boun...@lists.re-wrenches.org> > On Behalf Of Kirk Herander, VSE Sent: Friday, April 16, 2021 11:13 AM To: re-wrenches@lists.re-wrenches.org <mailto:re-wrenches@lists.re-wrenches.org> Subject: [RE-wrenches] Powerwall 2 AC PV regulation Hello all, I am adding more PV to an orphaned Powerwall 2 AC system (which is all new to me), -3- PW's stacked to total about 40kwh of usable storage. it presently has about 13kw of PV, though -2- SMA inverters, feeding into it through a common subpanel between the PW gateway and the main panel. I'm wondering if there is a limit to the amount of PV the powerwall can regulate/backoff (or use for battery charging) during a utility outage. What is the max PW charge rate? I need to add about 10 kw of PV to produce the owners goal of 100% coverage of electrical demand. If necessary for safety, i assume the extra pv inverter can be routed to the main panel, and then won't participate in battery charging if the grid goes down. Am I correct? Thanks. The PW manuals are of little use here. Kirk Herander / kirkh@vermont.solar <mailto:kirkh@vermont.solar> Owner|Principal, VT Solar, LLC Celebrating our 30th Anniversary 1991-2021!! <https://nam02.safelinks.protection.outlook.com/?url=www.vermontsolarnow.com&data=02%7C01%7C%7C9f0330d75a244870112408d685311841%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636842843233477645&sdata=0NjyuKeQbEK6245SNnk8X4XnP9Q%2B%2BqtvcALkdDghvk4%3D&reserved=0> www.vermont.solar dba Vermont Solar Engineering 802.863.1202 _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org <mailto:RE-wrenches@lists.re-wrenches.org> Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://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 There are two list archives for searching. When one doesn't work, try the other: https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/ http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: http://www.re-wrenches.org/etiquette.htm Check out or update participant bios: http://www.members.re-wrenches.org
