I agree. Power invertor is a must (without getting too technical). Here we basically use only one inverter and it has been capable of running all game consoles (among other things) over the years, and they are rated at 500 watts. I must add however, stick with a good quality unit and not the flea market or "cheapest on eBay" specials. Power coming out of those cheapies is horribley unreliable and we have even diagnosed a few to be causing the game consoles to lock up or generate disk reading errors...