Generac. I thought that load shed function was based on frequency downward deviation caused by heavy loads so perhaps this might cut solar at the only theoretically possible point where solar might be acceptable: high loads.
I'm at the point thinking what I tell folks all the time: don't interconnect solar downstream of the generator ATS. Sigh...was trying to minimize costs to customer in this post-tax credit world but these pesky generators. Howard "Scot" Arey Owner, Solar CenTex 254-300-1228 ________________________________ From: RE-wrenches <[email protected]> on behalf of Mac Lewis via RE-wrenches <[email protected]> Sent: Thursday, January 22, 2026 7:35 AM To: [email protected] <[email protected]>; RE-wrenches <[email protected]> Cc: Mac Lewis <[email protected]> Subject: Re: [RE-wrenches] Will IQ8 microinverters backfeed a generator during grid interruptions Hello Scot, What type of generator? Generac has a load shed module that can shed a load remotely by "knowing" when the generator is providing voltage. Small dip switches can be set to completely lock out the load when running on generator voltage. Generac Smart management module is the product name. There are also another product from PSP called the SAK-60 that supposedly can do this with any generator type (no direct experience with this). On Wed, Jan 21, 2026 at 3:01 PM Dave Angelini Offgrid Solar via RE-wrenches <[email protected]<mailto:[email protected]>> wrote: And in this case, with all the Ice storm doom and gloom coming, to alot of the country, inform your users how to turn off their array and run a generator safely! Offgrid is just so much easier sometimes. 😉 Dave Angelini Offgrid Solar "we go where powerlines don't" <http://members.sti.net/offgridsolar/> https://offgridsolar1.com/ <http://members.sti.net/offgridsolar/> e-mail [email protected]<mailto:[email protected]> text 209 813 0060 On 2026-01-21 12:55 pm, Zeke Yewdall via RE-wrenches wrote: In that case, we're getting way off track and way more complicated :P Just put a contactor between the PV array and the POI using the NC contacts, with the coil powered off the generator. Then the PV array can never backfeed the generator because it'll be turned off anytime the generator is running. Zeke ------------------ Thanks but I'm just trying to grid-tie a small Enphase array without ESS where the point of interconnection is on the customer side of the generator/ATS. Trying to use existing wires in place to simplify and lower costs...but the generator is my constraint because I need the PoI to be on line side of the ATS. Howard "Scot" Arey Owner, Solar CenTex 254-300-1228 _______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: [email protected]<mailto:[email protected]> 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/[email protected]/ 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 Pay optional member dues here: http://re-wrenches.org List Address: [email protected]<mailto:[email protected]> 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/[email protected]/ 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 -- Mac Lewis "Yo solo sé que no sé nada." -Sócrates
_______________________________________________ List sponsored by Redwood Alliance Pay optional member dues here: http://re-wrenches.org List Address: [email protected] 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/[email protected]/ 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
