My work-in-progress off grid house has a Pylontech bank with a Multiplus 48/1200 inverter charger. With the UK winter being not very sunny this last couple of weeks I had to bring in a generator to charge the bank - I hired a Stephill 6.5kVA unit. For some reason the Multiplus wouldn't charge the batteries at more than about 400W. If I turned on other loads in the house it would also power those from the generator output though (so with 500W house loads the total from the gen was about 900W.
With more dull weather likely before I can finish expanding my PV, how can I extract maximum charging from a generator?
