My setup is:
- 17 x Q Cells Peak Duo Black ML-G9 380w Panels (6.46 kWh array)
- 4 x Growatt PowerAmp ML33RTA 3.3 kWh batteries (13.2 kWh) total
- 1 x Growatt SPH3000 6.6 kWh Inverter
I’ve noticed that once the batteries are fully charged that :
1. The inverter starts to whistle
2. The...