I have a problem, could it be that the inverters have different capacities? I have a Phoenix 12/500 and I had no problem with overloading, now I acquired a Phoenix 48/500 with the same consumption But now I have overload problems . When I connect an appliance, for example a TV or washing machine, the 48/500 inverter is overloaded. I have never had that problem with a 12/500 inverter.