What amp rating do you need? Midnite Solar makes a small 30 amp manual
transfer switch, while Reliance (via Northern Tool) makes 60 and 100 amp
models. Or are you looking for automatic transfer? Generac makes a
bunch of 100 to 200 amp rated transfer switches. Square D and others
make some bigger load break rated stuff but it gets big and expensive.
Ray Walters
Remote Solar
303 505-8760
On 8/13/19 12:16 PM, Jon Siegenthaler wrote:
Hello wrenchers,
I have a client we're building for who is going to have installed two
of the SolarEdge Storedge inverters with two of LG Chem RESU
batteries. This electrical system also has a backup generator which
then requires there to be an interlock between the inverters and the
generator. I was hoping because this was a zero export system (as
required or by punishment of paying the utility for your
overproduction) that the SolarEdge smart meter would detect and not
export to the generator, but as a fail-safe it would be better not to
trust a $300 meter against a $10,000 generator and install an interlock.
My question is; has anyone found an interlock that would work with
this system? From my understanding the inverters would need to
switched off, but then the dedicated panels that the inverters are
powering would need to be transferred over to the generator power. The
simplest answer I can come up with is a panel with no bussing (mounted
on din rail) on one side with 4-2 pole breakers, each is set consists
of 2-2 pole breakers with jumpers on the backside so that the inverter
has a jumper to the dedicated load panel breaker. On the other side of
the panel would be either on a bus or also with jumpers that went to
2-2 pole breakers for the generator in and out and then also the 2-2
pole breakers for the dedicated load panels. Then there would be an
interlock that slides from left to right to control which system was
on, this being either PV or generator.
Thanks ahead of time for any help or product suggestions,
Jon Siegenthaler
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