Get a contactor with a 240 VAC coil. Connect the coil wire wires to the
240 V output circuit of the generator, so when the generator comes on,
the contactor opens. Run the current from the AC coupled Enphase
inverters through the contacts from common to N/C.
---
On 2021-05-03 10:26, Dave Tedeyan wrote:
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
1653 Slaterville Road, Ithaca, NY 14850
Cell: 607-288-2898
www.sungineersolar.com [1]
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[1] http://www.sungineersolar.com/
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