I have the same setup, Growatt 5000TL and Dyness 9.6kwh. When i set nr. 19 on 52v i get a the second green light from left on the battery flashing red. I then set it way back to 49.8v and the red flashing light disappeared. Two months later, on same setting i have a nr. 2 red flashing light again, and nr. 4 light is down (off) in the morning. Suggestions and advice please.