Hello, I have a phoenix 12/1200 inverter installed with the specifications stated in the manual. My problem is this: when I plug in a 500 watt hair dryer it runs for 5 seconds and shows an overload error. In the consumer app, it will not be done even at half the capacity of the inverter. I have a 250 ah battery. 25mm cable and a 200A midi fuse in the positive of the battery to the inverter .... What am I wrong? Thank yo