I have 5 x UP5000 pylontech batteries and 20 x400w panels connected through 2x 5kva phocos inverters.The battery SoC always get to 70% and never beyond. When the sun sets the battery SoC drops sharply to about 33% or 34%. In the morning the battery SoC will be indicating 30%.
1. What could be causing the battries to fail to charge beyond 70%.
2. Why does the battery drop sharply from the 70% to 33%?
I will be grateful if anyone can assist me on these two issues.
NB: the system is 2 weeks old