Why Inverter Showing Overload Without Load. Appliance with a surge power rating that exceeds the inverters. Battery will discharge quickly if theres some kind of short circuit due to faulty devices or may be a defective battery itself.

In this case people need to do is turn off the electrical switch then open the inverter switching finally open the highest peak electrical appliances so that we can best meet the electrical needs. Likely a resistive fault low level on the output side. First establish that power is being delivered to the charger.
And old square-wave UPS would probably do that.
The alarms in inverters may beep continuously sometimes. The alarms in inverters may beep continuously sometimes. A Smart-UPS 700. You havent broken one of the rules outlined above but the voltage is still at a concerning level.

