My configuration:
3 Multi RS Solar 48/6000/100 firmware 1.25
4 pylontech US5000-1C (18.6kWh)
Cerbo Venus OS 3.63
Solaredge SE7K firmware 0004.0020.0036, at AC OUT 1
While testing from on-grid to off-grid, I encountered the following issue:
When the Solaredge generates say about 2kW during the day, and the battery is not full (<=80%) and is charging, and I switch from on-grid to off-grid, the entire Victron installation (all three inverters) goes into a protection mode for approximately 30 seconds, then restarts, and everything works off-grid as expected.
During these 30 seconds, the entire house is disconnected, and later, I see in the alarm logs that a “High AC output voltage alarm” was active on phase L1 (see also picture of the two tests).
When I perform this test in the evening, when there’s no SolarEdge PV output, the transition from on-grid to off-grid is seamless, I don’t even see the lights flicker inside the house.
Does anyone have any idea on what to do?