Charles 93-ACP1226 Modified/Quasi Sine Wave Inverter Designed to deliver tightly regulated, efficient AC power for the most sensitive to the most severe and demanding applications. These units offer optional battery charging with automatic transfer switch, remote and versatile mounting. All of the power in the package you need! Rugged Construction High Surge Capacity Continuous Duty Rated 3-Stage Battery Charging with Auto Transfer Switch (optional) Modified Sinewave AC Output Optional Remote Available Automatic Load Demand Start/Stop Low/High Battery Voltage Cutoffs Low Idling Loss in Load Demand Mode UL/C-UL Listed for Safety