Hi community, I have some understanding problems about what my ESS is doing, sometimes, and sometimes only, this is my biggest concern.
I have a basic ESS with MP2 10k, Primo 3kW, RS450/100, Cerbo and 84kWh of DIY batteries
I noticed that, sometimes, the ESS, instead of, as usual, managing to balance between available sources to feed my AC Load, start to pull the maximum it can from my AC-IN (limited to 14A by settings)
Like in the example below, at 11h40, it start consuming a maximum from AC-IN despite batteries were almost full. and it continues when batteries were full by even stopping the RS450 (green line) before to awake from it's mistake and go back to a "normal" status.
It is repeated at 12h54 where batteries were full and even worse as here it stop the MPPT to take from the grid!
The basic work around is to switch off the grid, but this make the ESS worthless.
And for those arguing about compatibility, yes my BMS are Seplos models, not "approved" but in that typical case, DVCC is enabled, CVL, CCL and DCL from BMS are at the maximum and CVL is voluntarily downgraded to 55.5V from DVCC menu to avoid working at high voltage in the battery during the summer months.
I would be grateful if someone could explain me why the CErbo is behaving that way and mostly if there is any chance to correct this behavior by changing any of the parameterization (or programming?)