If the circuit breaker trips or the UPS attempts to transfer to battery in an overload condition, the load's power will be shut off. ... If the Overload LED remains illuminated even without any load plugged into the UPS, the UPS has most likely sustained a surge or fault, and will need to be replaced.

What would cause an inverter to overload?

The most common reason for a power overload is when the inverter is used to its hilt or instead reaches its peak power output. You may argue here that industrial power inverters can withstand as much as twice its peak power. However, there is always the possibility of your connecting too much equipment to the inverter.

What does UPS overload mean on inverter?

When the Overload/Check Battery LED is illuminated solid red (not flashing), the output capacity of the battery-backup/ surge-protected outlets on the UPS has been exceeded. ... The UPS needs to be reset. The UPS was previously overloaded and some equipment was removed to reduce the power draw of the connected devices.