We have a couple of off-grid systems (not SolArk) where we put a Dwyer current sensing relay on the output from the generator, energizing a Gigavac, DC relay that opens the combined PV output circuit and it works well.
Not exactly what you are looking for, but the principal would be the same. -Glenn From: RE-wrenches <re-wrenches-boun...@lists.re-wrenches.org> On Behalf Of Dave Tedeyan Sent: Monday, May 03, 2021 10:27 AM To: RE-wrenches <re-wrenches@lists.re-wrenches.org> Subject: [RE-wrenches] Generator and AC coupling on a Sol-Ark Hi All, I am planning on using a Sol-Ark for the first time for adding battery backup to an existing system. It is Enphase, so clearly it will be AC coupled, and there is a whole house generator. When I talked to Sol-Ark about it, they recommended putting the generator on a time of use schedule to not allow it to come on during the day so that we don't run into the issue of the solar backfeeding the generator. I was wondering though if anyone has just used a contactor to cut out the solar when the generator turns on? Something like Outback's GS-AC-Gen-Kit, although in this case I will need something rated for just over 30A. This seems like a better way to allow the generator to run at any time it is needed, especially if it is a gloomy, snowy, winter day. Cheers, Dave -- Dave Tedeyan, PE <http://sungineersolar.com/wp-content/uploads/2019/08/Sungineer-Logo-1.png> 1653 Slaterville Road, Ithaca, NY 14850 Cell: 607-288-2898 <http://www.sungineersolar.com/> www.sungineersolar.com
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