Sine Wave Inverter Series (Rack & Tower) Rack: EVR-1000 / 1700 / 2500 / 3500 Tower: EVT-1000 / 1700 / 2500 / 3500 Special Feature Sine Wave output. Wide DC input range. Output short circuit protection. DC input polarity protection. Designed for any kind of load. Adjustable low battery shutdown level. Automatic restart of load after overload shutdown. Audible alarm. Thermal control cooling fan. Generator compatible (for units with AC input). Smart Bypass function (for units with AC input). Full function of LCD display (LED display optional)