What is the difference between the Morningstar SureSine Wave Inverters that are 115V and 220V? Posted by Frank Molina, Stellavolta on Oct 11th 2018 The 115V is designed for the U.S. market, whereas the 220V is designed for other parts of the world that use a different voltage. Morningstar Morningstar Corporation SureSine Inverter SI-300-115V SI-300-220V