meetyg
Solar Addict
- Joined
- Jun 4, 2021
- Messages
- 1,214
That's how I solved the N-G bonding issue on my AIO: Normally Closed relay/contactor, powered by grid (open).So it seems that the inverter messes with the neutral while inverting. When running on shore power (pass through) is the only time the N-B bond is there. The simple fix would be a relay across the inverter input, using the normally closed contacts to make a N-G bond on the output side. If you don't have power coming from the shore, the relay contacts will make a bond.
That's the brute force method of relay logic that worked for my 40 year traffic signal maintenance career. I think using the program #38 and inverter contacts might be more elegant.
Works fine. I do have some worries about the lifetime of the contactor (coil powered most of the time, except for power outages). But I got some spares, just in case one would fail.
It does take a few seconds for the inverter to reconnect to grid when grid power is back, meanwhile the contactor is open. This means that the output will float during those few seconds, but I'm fine with that. I could have used a time-delay contactor, but didn't know this existed at the time.
I might upgrade in the future.