New Ultra series pure sine wave inverter charger is a combination of an inverter, battery charger and AC auto-transfer switch into one complete system with a peak DC to AC conversion efficiency of 90%. It is packed with unique features and it is one of the most advanced inverter charger in the market today. It features power factor corrected, sophisticated multi-stage charging and pure sine wave output with unprecedenetedly high surge capability to meet demanding power needs of inductive loads without endangering the equipment.