Well when I have used ours, they are set up to run on either 750 watts or 1500 watts. At the max setting your drawing around 12 amps. I found when I ran ours on the wide open setting, the AC power cord to the unit and even the outlet it was plugged into got pretty warm after a period of time. So just for the sake of being on the cautious side, I ran ours only on the 1500 watt setting while we were awake.