I have a Multi Plus II 3000, configured to shore power and a 5.5Kva Onan Generator. The multiplus, always detects the shore power and switches correctly, however when fed from the Genset, will often not switch over. The switching occurs but it doesn’t seem to always latch. Sometimes you will hear it trying to switch over for around 10 mins or more.
I have found that adding more 240V load to the inverter will sometimes force the switch over earlier , or restarting the generator can also work, however both work around are inconsistent.
Thoughts. ?