... onOverload, inverter will shut down automatically when switching to battery for power supply , no output , or inverter failure , ... lamp onInverter works at city power modeBUZZEROverload , low battery , or inverter failure Technical Specifications-2Power (w) ... 30AGeneral ProtectionOutput short, Over voltage, Low voltage, Low battery voltage, Surge protectionOverload Protection100-120% 30 sec, Over ...