I don't think 400 watts will cut it, you'd need more like a 1200 watt inverter. not to mention, have you ever run an inverter with an extension cord? depending on how long it is you won't get the same power at the end of a cord as you will directly at the inverteryeah if it has ac connection just get an inverter from walmart or whereever for 40 dollars and an extension cord unless your using battery only just cut the connection off that goes into the lighter and connect to battery terminals Walmart.com: Whistler 400-watt Power Inverter with Circuit Pro: Auto
easy shit