I’m having a problem the AC outlet from the inverter. Everything appears to be ok with the exception of this. When I connect the ac outlet to the grid supply I have a fault code 08 (bus to high) and the system goes into shuts down. I have tried connecting it directly to a load (2.5kw heater) and there is no problem. Has anyone got any ideas please.

    This is a WonderWatt community. You might try googling Growatt.