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
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.
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.