Hello Victron Friends!
I’m facing an issue and would like your thoughts and help!
I installed a lithium battery and connected it to the system, communication is working, and DVCC is enabled. I have ESS set at Keeps battery charged, since grid failure is frequent.
What is happening is that when the battery reaches 100%, instead of only the battery charger cutting off, the PV Inverter goes down, shutting power to the loads. The batteries then start discharging to supply that load. The batteries discharge for about 5-10min, then they start charging again from PV, and the cycle repeats. Each time the PV inverter shuts down the power flickers.
What I noticed is that the battery BMS sending a over voltage protection signal as it seems some cells are topping up faster than others.
What I expect to happen is that when batteries top up, charging to the batteries is stopped, no discharging happens, loads continues to be supplied from PV array.
The graphs belows, show the fast switching of the PV Inverter power. Notice how it aligns with the Cell over voltage which gets triggered at 3.55V.
Which results in SOC graph looking like this although there was enough PV Input from 11am to 3pm to keep batteries at 100%.
