@dognose Hello, would you also be so kind and check what happens on the victron when combined with JK-BMS in DC Coupled systems. It happens only when selling to grid is enabled. ESS continous switching between charge/discharge when battery full and negative grid power
It is well documented in few threads as well. Battery keeps charging and discharging with approx. 1kW of power when at max requested voltage. It seems that victron just ignores maximum charging voltage requested from a battery and increase DC bus voltage higher. SVS shared voltage does not help. Setting maximum voltage (CVL) in victron does not help.
My personal favorites for cause are:
- CCL from JK BMS is still constant even at max charged SOC. But when I tried to limit CCL in Victron it did not help either.
- JK BMS does not turn off charging mosfets at 100% SOC and with higher DC bus voltage it just naturally absorbs power → Victron then sees higher voltage than requested → discharges at maximum pace to compensate → charges → all over again …
This does not happen on pylon batteries, but I do not know if is caused by mosfet deactivation, CCL limit or anything else.
Also it looks like whole Victron battery management is not prepared for this type of BMS behavior - no CCL changes, float stage, mosfets still on… as we can see in this thread