Hi anyone can help me understand what doesn it mean this screen. why do I have 2 modules blocking charge and no available capacity info.
If they are blocking charge - they donât want to be charged. Not really a problem as they are reporting 100%
The installed/available is a funny variable between manufacturers. Many donât bother to get that right.
4 are online so they are all communicating the basics ok.
What batteries are they?
Looks like SUNWODA.
I think not all available Victron dbus values are supportetd (filled) by the battery BMS.
If the battery charges to SoC 100 and discharge correctly, all is fine.
As example: Pytes serves all fields.
Please make a screenshot if SoC is lower and the batteries are in charging state.
1 Like
Thanks for sharing. It also looks like other batteries i have seen so couldnât point to a specific one. So not unusual.
Thank you for your answers so far much appreciated
Indeed sunwoda
why there is a big difference between the low cell voltage and the highest cell voltage
I saw somewhere that the maximum value between these values should be 0,05 volts and a bigger value could mean a cell balancing âissueâ
Can vary from manufacturer to manufacturer. So really may be a piece of useless information if it wasnât stated by the battery make you have.
You can ask the Sunwoda Technical Support how their BMS supports the standard BMS-CAN and what are the Sunwoda LFP balancing parameters.
50 mV difference in cell voltage is no problem I think. This are very dynamic values, if great currents occure while dis/charging the voltage difference rises up, at lower currents the BMS balances and the difference will be lower.
I think all is running fine. Only some dbus values (BMS-CAN values) are not be supported, no problem. 
And if one or more battery packs are at SoC 100 the BMS send these packs as âblocking chargeâ, but only at THIS moment. They are functional.
Ok Thanks 