... function 3. CE&ISO pure sine wave low frequency inverter,inverter charger 24/48v 5kwmain application1> Transport equipments: military ... lighting, electric cutter, sewing machine, etc.5> Kitchen appliances: microwave ovens, induction cooker, refrigerator, etc.6> Electric tools: ... Over heating protection: Temperature above 40 degree, the inverter turn on the cool fans automatically, if above 60 degree, ...