solar inverters Off grid Pure Sine Wave SoInverterFirst: Scope of application1,Transport equipments: military ... , Medical ambulance, ship, traffic lights etc.2, Industrial equipments: solar energy system, wind power, metal halid lamp, high voltage sodium lamp, etc.3 ... 40 degree, the inverter turn on the cool fans automatically, if above 60 degree, the buzzer will keep on alarm for 1 min then shut ...