... is not only a power inverter, it is a 12v battery charger and an automatic UPS UPS =(Uninterruptible Power System ) When ... fault protection, overload protection, short circuit protection.3. Inverter and charger indicator: Fully charged, Public Power, Inverter fault.4. Dual ... way and everywhere, where is no electricity ! Simply connect with 12v/24v Battery as in a Car, Motorcycle, Camper or Boat and ...