I have a Victron 12 500 20 Multi. I used the correct recommended cable sizes to connect it and it has a 100A breaker between it and the leisure batteries.
It runs through a consumer unit with 16a mcb to the sockets.
It turns on in inverter mode, and I get power in my 230v sockets - I used a test plug to show no faults.
When I plugged in a 250watt heater the alarm led flashed on the multi and the breaker switched off.
I thought I could run appliances up to 500watt on the inverter, so why did the breaker blow?