P.S. The contactor method is even mentioned somewhere in the Outback
literature. I've been using it for years. It is very simple and
requires no complex equipment. It will not interfere with rapid
shutdown. 40 A, 240 V contactors with 240 V coils are readily
available and not terribly expensive. The 240 V output of the
generator circuit provides the signal.
At 10:02 AM 5/4/2021, you wrote:
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
Sungineer Solar
1653 Slaterville Road, Ithaca, NY 14850
Cell: 607-288-2898
<http://www.sungineersolar.com/>www.sungineersolar.com
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