The difference at the nominal voltage is more critical than during the end points. So at 4V+ its not a problem with 0.2v difference to be honest but at 3.6-3.7v it need to be lower and this is due to the amount of energy stored at that potential.
0.1v is not a huge thing. You can connect them...
Then you just need to install Portainer and have access so you can logon to it and edit the configuration afterwards. Then also install local Mosquitto.
Then if you want grafana graphs you install influxdb and Grafana on top.
Beware of that if you dont run this install on SSD or enterprise SSD...
As i said it sends ON - throttle(lower) - OFF.
The BMS is not to PID control the charger thats for the charger to do. The "throttle" level in the middle is to tell the inverter "Hey we have one cell that isnt balanced so total voltage is wrong and i cant keep up balance. Please can you reduce...
I will publish a video tomorrow regarding installing Watchmonudplistener on Home assistant if thats interesting. :) If so stay tuned for that. Though im not going into grafana on home assistant. Never used it there myself since raspberry pi have limited resources.
Unifi with raspberry pi and wifi is just the setup that i have seen the issues with. In worst case it kills local network on the raspberry PI. Dont ask me why though since i have not found it out but there are a couple of bugs out there regarding it. Yes i have seen it at home and i run Unifi...
The bms only sends a signal stating "Lower charge" or "stop charge"
There is no regulation like a PID. That is up to the charge controller to handle and not the BMS. Look into how you have set up the middle point and what it should set it to.
So the bms does exactly what its told to do now...
I run the ABB too and have for 6+ years now. They work great and you get them 2nd hand for about 60-80USD in general. S3 for 100-200 and its larger s5 for 200-500A.
They are quite big :)
And as mentioned they are often 24v coils and make sure it comes fitted with it from the start.
Its time and soon to be releasing the new Ultimate Solar raspberry pi System
* Its dynamic and docker based
* With help from SensorsIOT and IOTStack it do contain most key components from the start
* I have added Batrium support
* I have added Solar-sis (MPP system support)
* I have added...
I would go 3s too. That car is most likely not made for higher voltage and step down is waste. Also note that Lithium can supply 100x the current in short bursts compare to that lead acid battery can and that may be an issue with term of lack of electronics in those older cars :P
The TP chips...
You need both :D !!
I have 2 3dprinters and 1 cnc and thats ok. Because 3d printers are slow and tend to need more service than the cnc that use proper ballscrews and gliderails and stuff :P Though the cnc did cost tad more than my printers did.