I had a similar scenario a few years ago and looked at the Generac SSM, but for some reason(s) I cannot recall, could not go this route. The system was on a house and the auto transfer switch and generator were in a shack that was unreasonable to trench too, and we did not want to rely on a wireless option.
The solution we came up with was a contact that would disconnect the inverters from the house panelboard upon a loss of voltage (grid). Unfortunately we did not come up with a solution that would automatically reconnect the inverters once the grid was restored... because we couldn’t reliably distinguish between the generator and the grid, so it required a manual reset once the customer could confirm they had grid power and not running off the generator. The client said they often did not know that there was a power outage so there could be times they would not even know the inverters had shut off... so I ran a low voltage line to a LED light in their kitchen area that would come on upon loss of grid and would go out when the inverters were manually reset. Benn Kilburn SkyFire Energy 780-906-7807 > On Feb 25, 2021, at 6:40 AM, Nik Ponzio, Building Energy > <npon...@buildingenergyus.com> wrote: > > We are installing 25kW of PV on a service with an existing backup generator > (Eaton 30KW) and auto transfer switch. Because of the remote location of the > generator and transfer switch, we can not easily connect on the grid-side of > the transfer switch as we usually do (without cutting a very long trench.) So > we're looking for a way to lock out the solar during generator use. And then, > ideally, reconnect the solar automatically when the grid is restored. > > Is there an off-the-shelf product available at this point to accomplish this? > > I see a thread on here from a couple years ago that recommended the Generac > SMM for this type of scenario. Any current thoughts on this approach? > > Any suggestions would be appreciated. > > > -- > Nik Ponzio > Building Energy > 1570 South Brownell Road > Williston, VT 05495 > direct: 802-318-7003 > npon...@buildingenergyus.com > http://www.BuildingEnergyVT.com > > > "Building Solutions for a Sustainable Future" > > _______________________________________________ > 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 >
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