The MS-AE 120/240V Series Inverter/Charger is a pure sine wave inverter designed specifically for the most demanding renewable energy applications. The unique design of the MS-AE Series can provide 120 or 240 volt split phase output in one unit, eliminating the need to stack two units together or adding transfromers to obtain 240 volts. ETL listed to ANSI / UL-1741, CSA C22.2 #107.1-0. 3-year warranty