[RE-wrenches] grid-tie solar behind a generator

Nik Ponzio, Building Energy nponzio at buildingenergyus.com
Thu Feb 25 08:40:18 EST 2021


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
<https://mailtrack.io/trace/link/7643522e54e5bd30057d2e139c7b93d1c488b655?url=https%3A%2F%2Fwww.mail-archive.com%2Fre-wrenches%40lists.re-wrenches.org%2Fmsg23906.html&userId=6273276&signature=c4db635fbd2d1225>
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
nponzio at buildingenergyus.com
http://www.BuildingEnergyVT.com
<https://mailtrack.io/trace/link/058e994a3bba9674653a69dd2a6976e0914d2761?url=http%3A%2F%2Fwww.BuildingEnergyVT.com&userId=6273276&signature=8b5247886585b42b>



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