Microtek International — My inverter is on battery mode while main AC is continue

Address:

Junagadh, Gujarat, 362560

Since last night, I had found that my inverter is on battery mode while there is main AC supply is continue .routinely inverter shows battery mode only when main AC is gone but since last night inverter show battery mode only while AC is continue.indicator on inverter shows only on battery mode .what we do either switcf off or continue ?pls reply as early as possible