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As my Multigrid didn't come back after a power outage (Error 11), the critical loads (fridge & heating) didn't come back on-line either. :o(
To avoid this in the future I do see two options
1. connect the critical loads to the grid an forget the UPS function
or
2. monitor grid down and grid recover and check if ACout1 is back after grid recover. In case ACout1 remains off, switch critical loads from ACout1 to Grid
Before I start developing...did anybody already create such a simple watch dog ?
You could use an automatic transfer relay, with preference for the inverter output.
But I'd just get the system sorted to work well. Maybe get a technician on site to check everything?
Txs for the hint, I'll look for such a relay.
Of course I want the system working well, see here, but the situation has shown me the weak point in the setup. So the watchdog is by backup, for the backup :)
