I've got a MultiPlus set to charge a bank of 24V batteries (no inverter required).
In accordance with this: https://www.victronenergy.com/live/multiplus_faq
My charge controller is 1600VA, and my generator is 4.5kVA and AVR so should be fine. My generator is running fine, with no stuttering or difficulty starting.
These are the details for the inverter/charger:
Despite all this, the MultiPlus doesn't accept the power coming in from the generator. There are no alarms reported:
But the charger reads "Fault":
And so the AC in claims it's disconnected and at 0W:
The same is true when I move the switch to Inverting, only it claims there is no fault:
It seems when the generator runs, the batteries jump temporarily up to 28V, but then fall immediately back to about 22V, so haven't actually been charged...
Any suggestions would be greatly appreciated.