Goodwe ET Series User Manual page 23

The battery does not charge even if there is enough PV power
Solution:
1. Make sure the discharge time is not set.
2. Check that the battery is not fully charged or that the battery voltage has not reached the 'charge voltage'.
High variation in battery charging and discharging current
Solution:
1. Check that the performance in the house does not fluctuate.
2. Check that the PV performance does not fluctuate.
The battery is not charging
Solution:
1. Make sure the BMS communication is in order in the PV Master application;
2. Check that the CT is connected in the correct position and direction as indicated in the user manual;
3. Check that the total consumption is not much higher than the PV output.