... voltage,accruate output,AVR function.4.Inner-equipped protection for over-load,short-circuit,over-voltage,low-voltage,over- ... Vdc (can operate with 0V battery)Communication:RJ11 (Used for factory testing. No customer interface available)Safety CertificationCompliance with UL458CE ... AC invrter WHITE COLOR INVERTER Apply to MPPT/PMW solar charge controller 48v dc ac inverter 4000Watts ,5000w ,6000w ...