... 2,LCD display inverter 3,pure sine wave inverter 4,super charger inside 5,CE ,SONCAP solar system use solar inverter ups 2500w ... over-load,short-circuit,over-voltage,low-voltage,over-heating,etc.5.Easy to check with inverter with consice LED ... model: 54.0VdcProtectionDC input polarity protection, DC input short circuit protection( when battery isconnected), DC output over current protectionPHYSICAL ...