A simple solution to emergency lighting. Pure Sine Wave Output; compatible with all LED, incandescent, fluorescent, and induction loads. No start-up fee. Quick and easy one person installation for new and retrofit. No monthly fixture test when used with EPC-A-1. Thermostat controlled silent cooling fan. 3/6 Warranty; 3 year replacement warranty on electronics, 6 year pro-rata warranty on batteries. Sealed Lead Calcium batteries provide long life and are maintenance free.