My system is configure in DVCC mode. In the VRM BMS/Battery config, in the parameters tab page, I see the CVL value configured 57.60V (3.6V per cell). Where is this value originating from? In my JK-BMS config, I’ve NO value set to 3.6! The Vol. Cell RVC field is configured at 3.450V. [image]

@Diessel That is over voltage protection recovery value… :slight_smile:

This is value request voltage for charging from BMS

voltage protection recovery = OVPR

Sorry, my bad, the OVPR is below… :blush:

Don’t know why, I checked again and the value has been updated. 53.6 / 16 = 3.35 is a value i’ve filled in into the BMS in the Vol. Cell RFV field. [image]

[Screenshot_20250520_164320_BMS]

Question, is the CVL value being updated (by the BMS to the Victron system) depending on the charging phase (bulk, absorption or float)?

Yep! RCV = bulk & absorption voltage RFV = float voltage UPD: The charger listens on the CAN bus for what the BMS requests. I gave You a link to video, where’s explained in detail the new BMS algorithm. And the meaning of each parameter JK-BMS.

These values are forwarded by the BMS with CAN-ID message 0x351 Note that Victron code assumes that a higher voltage than 55.2V is the responsibility of the BMS. Like it knows what it is doing :grimacing:

Where is the JK-BMS CVL value originating from

DIY

Diessel (Diessel) 20 May 2025 13:36 8

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Where is the JK-BMS CVL value originating from

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