Inverter drawing power from batteries more than load power

[mahmoudad]

I have a must pro pv1800 5.2 kw off grid. The battery power is around 130 watt greater than load power. This started 10 days ago. Is this a cause of concern

 

[AntronX]

Probably not. What load are you powering? 55% efficiency at 3% rated load is not surprising. Try to power resistive heater at 2kW and check these numbers again.

 

[mahmoudad]

Probably not. What load are you powering? 55% efficiency at 3% rated load is not surprising. Try to power resistive heater at 2kW and check these numbers again.

The 130 watts difference is the same

 

[mahmoudad]

The

The 130 watts difference is the same

Powering tv and router and a light now. Whathever load i have 130 watts extra are drawn

 

[AntronX]

Could be measurement error. Typical standby power of inverter of that size is around 60 watts.

 

[mahmoudad]

Could be measurement error. Typical standby power of inverter of that size is around 60 watts.

It wasnt like that. It started 10 days ago (when the cold storm started)

 

[AntronX]

Battery heater active? What brand/model is your battery?

 

[mahmoudad]

Lead acid, luminous 200ah, no battery heater