I got 2 BasenGreen 16kW battery sets. Their BMS can be put in parallel one as a master and the other as the follower. However, I would like to connect the two of them independently, one on CAN bus 1 and the other on CAN bus 2.
Is this configuration supported by Multiplus II?
Not really, only one can be master and control the system thru dvcc
My problem is that the batteries are not DVCC compatible and it is cleared stated that you should not use DVCC with no compatible batteries.
From their own blog and information, they are designed to work with rs485 between them selves and one can connection to the Victron system, like pretty much every other battery system.
Donât think there is any harm in trying, although what will you will be achieving? The addressing system is designed for mater slave, you canât have two masters.
Just for troubleshooting⌠The batteries are new and they are unbalanced. When you have them together VRM will tell you about the V max and V min of the âsetâ, in this case the 2 batteries. In this way you canât see the balance evolution by battery set. But I agree, once balanced, there is no reason to keep them separate.
So you will have to proceed with charging them as individuals - one at a time. Time consuming but hey thatâs the installation done right.
I got a problem⌠When they are very close to 100% SOC, balancing starts. If just one cell (over 32 of them) get at 100% the BMS sends a 100% SOC to Multiplus that, in turn, move into floating. So they never get really balanced. Any suggestion on how to overcome this?
Last question: Is it there a way to force Bulk mode and let the BMS cut charging if gets to a âover chargingâ point?
Why is the bms not doing that?
Set the absorption time to a few hours that should hold the battery bank at the higher voltage longer.
If it is overcharging then change voltage settings, but again the bms can override these.
Force it is easy, put the system into charger only.
The system is in charge only mode on ESS, but on VRM it shows as âFloatâ. I guess (notice âguessâ) it will not provide voltage as we have in Bulk so the batteries will not go up to its charge limit. It is on 99% SOC and not receiving any currentâŚ
It meaning the battery? It should.
You can load a widget for ve bus voltage and current.
Is it using the âholdingâ voltage as float the 54.5v?
In Multiplus I have:
You canât override base programming in node red.
If you want to then set them both to the same and then use node red to lower the CVL in DVCC.
Again though to what end? Do the batteries you have have an app? Check their balance there if they are not reporting it to the vrm.
DVCC is disabled as the batteries are not compatible. On the BMS I have:
Thank you for your help! If you get any suggestion just let me know, considering DVCC is disabled.
Very likely the bms will not allow that.
The 56.8v is 3.55v. it is sufficient for balancing. 3.65v is not safe if the balance system is not good in the bms as there will be overshoot.
If you do decide to do that donât hold it there. Watch the CHG mos they will likely disengage
I have disconnected the BMS from Multiplus and starting using the Multiplus charging control. Then I changed the Charger to:
