It’s possible but strongly strongly discouraged.
Relevant first step is the “quirks” section of the VenusOS source code, specifically the DVCC.py
This thread is not specifically about your issue, but reading it should provide all the necessary information and background to understand what it is you are asking about, and hopefully enough to persuade you that the time is better spent lobbying your BMS supplier - MPPT getting wrong Charge voltage limit from Cerbo/ESS
There was a time where we tried various things to work around this system behaviour (such as translating CCL signals), but have now concluded that we will no longer do this on a manufacturer by manufacturer basis,
Instead we uphold a clear protocol specification. Now so many have complied, and the results are so good, it was surely the correct decision.
In the long run all these quirks will be removed, and all betteries will be expected to be protocol compliant.
I must say here and now you are on your own making any kind of modifications like this. I expect you can improve things for your system, but who knows what kind of other unintended consequences.
To perhaps help you with Basen, here is an extract from the BMS-Can specification that clearly states the requirement. I am going to presume they have never read it, because it’s not possible to have and also say everything is correct.
There is also a testing protocol, and the behaviour shown in your screenshots above would fail it.
