I bought this to use with a backup battery solution I was building for my drain pump. The drain pump requires 1115.5 watts of power, which it handles well as it is said to be able to reach up to 3000 watts with the pump using more power to start. to switch on and off. I ended up buying a 2300w inverter and that fixed the problem. I haven't changed anything else in the settings. If you are looking for a battery powered air conditioner drain pump, look no further. I ended up sending it back and I