Night-time export to grid

(Location - India)

Hey everyone

I recently got a 10kW Deye hybrid inverter installed with a 5kW battery. Things were going good, until the electricity board personnel came for meter reading, and that there’s night-time export to grid. I’m certain I didn’t enable grid export(at night). He suggested that the meter could be faulty, so I got a new one, and the issue continued.

My installer isn’t helping me much at the moment. He says the new meter could be faulty, and to replace it 👀.

If anyone could suggest/guide me on what I can check on the inverter, that would be much appreciated. Thanks in advance.