... and can prevent to leak the current protection.4. Intelligence controller the battery voltage, have PWM switches to connect the way ... under voltage, overvoltage, over temperature, over-current, short circuit, etc.Cooling methodFan-cooledNoise<55dBDegree of protectionIP20(indoor)Using altitude(m)≤6000CE ... , EN61000-3-11:2000 SDP-2.2KW-380V output PV controller inverter system