I have two Fogstar Drift Pro LiFePO4 batteries in parallel. Their CAN outputs are connected to the Cerbo separately one to the BMS Can and the other to the VE Can. Data rates etc are set correctly and I can see both batteries in the dashboard with slightly different voltages and states of charge, giving me confidence that both are communicating correctly with the Cerbo.
However, in the advanced Tab I cannot see both or create a widget for both. Looking in the setup there is only one VRM instance for a Drift Pro battery.
I even tried the AI widget creation but that simply created a widget with One Drift Pro and my BMV -712 and told me it was for both!
Has anyone solved this issue or would the Cerbo need a firmware update (I am running 3.66)?
@Plshep1 I suggest you daisy chain the two batteries correctly via canbus as per the fogstar manual with one connection to the Cerbo. Terminate the chain accordingly at both ends as required. I’d expect both batteries will show up as a single bank with a master, which allows the systems to function correctly as two batteries cannot control one system and the batteries can be charged properly and remain at the same level and in balance.
Ok. That is for the 1st gen battery. It is not on the Victron Battery Compatibility [Victron Energy] so best to also check with fogstar to what extent it is compatible.That said, Victron has introduced parallel bms functionality for their Lynx NG range, so since you say you can see both batteries (screenshot plse) it may just not pick something up on the vrm side.
Screenshot of the Dashboard showing two batteries, note occasionally they do show different voltages etc showing the Cerbo is getting valid data from both:
Have a read here of how it works with the Lynx BMS section 8.4. Also note that Victron BMSes only work with Victron battteries making the fogstar statement redundant. I can only suggest try setting a different can instance even though they are seperated.
Sorry, I’m confused about your Lynx BMS statement. I don’t have Lynx BMSes. ALL I want is to be able to have two VRM instances for my two DriftPro batteries so I can see their details separately. in the Advanced Tab.
Firstly, the batteries are not supported by Victron and neither are third party parallel BMS implementations at this time (I stand to be corrected on the latter and the topic was raised on accasion in the form), so you are on your own and should approach fogstar support. However, if you look at the implementation of the parallel BMS with regards to VE.CAN the to see if as I suggested it maybe has to do with the instance setting (read set a different instance for one as per the ducumentation), which could result in the battery being seen as one bank or two separate batteries, it could be worth experimenting with it.
