Seplos BMS
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So behaving ok the last few days thank god.
Couple of things I'm noticing that I might be able to sort via settings?
1) Battery stopped discharging bang on 30% last night even though so far is set at 80%, looks like one of the batteries ran away. Is this ok? Should I do anything to try and get it to discharge to lower?
2) Only charging at max 1.6kw, I'm almost certain I've set it to 60A in the sofar?Anything to do to improve this?
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your battery is "more or less full"
Dont have the seplos, so Cant help you of what parameters to change.
had a look at the xml, they seem to call voltage "pressure"
Alarm should stop the inverter gracefully, Protection the seplos will yank the power and cut the battery off from the inverter.
To balance out the battery with the neey, you possibly could use default mode (actual settings dont really matter as long as the soc is calculated below 90%), and set the max charge at say 55v, and force a charge at 500-1000w and hold that charge (float) until all cells reach 3.43.
Bump the voltage to 56, repeat, until all cells reach 3.5, then 57, then 58.
the last couple of steps wont take that long, once you have all cells above 3.4.
Or an external power supply would work too if it can reach a high enough voltage.
after all that is done, the battery will be top balanced.
at the next full discharge you will be able to find your "lowest" pairs and the highest pairs, a bit of trial and error here you can swap one of the cells to make 2 average batteries instead of a good and bad one
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For those of you that are using SEPLOS_MQTT integration, how do you create the MQTT Sensors in HA?
I've managed to get the MQTT broker setup and data is sent via USB/PI to HA. However, I'm not sure of the next steps to create the sensors and create the dashboard like so.
Any pointers?
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Have you your cables in the correct sockets ? The canbus is nearest the Red DIP switches.
As you can see here, I have both simultaneously hooked up and the RS485 goes to a Pi and is constantly retrieving cell voltages and other params.
On the Solis, I think you need AoBo or something like that. I think it's then Sofar on the Seplos side (happy to be corrected)
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@jasgrif11 I got your PM but it may be more beneficial to everyone else if I answer the question publicly.
I never found a solution to the SEPLOS capacity limit so I sold it on and purchased JK BMS.
Using ESP32 board to connect JKBMS to Home assistant - https://github.com/syssi/esphome-jk-bms and have it setup as Lead Acid Battery. I have all the info then I need for any automations after that.
I have one small issue with the JK BMS which I think maybe is a miscalculation in the BMS settings(Or it could be a battery capacity issue) in that the Battery SOC stops discharging at 30% SOC as the inverter is set to stop discharging from the battery @ 48V, but then when it charges from 30-100% the battery seems to consume ~24Kw which would be correct for a 30Kw battery. I also think the the voltage range on the lead acid battery setting in the Solis inverter would be more suited to a 15s setup rather than 16s. Anyways am waiting until the long nights and then I will be able to diagnose the issue further as at that stage I will be fully charging and discharging daily.
There is also a Github project out there to connect the JK directly to the Solis inverter via Canbus but I never got around to that because what I have suits fine, could be wrong but I do believe that I did read somewhere that @graememk may have that system on the go.
The inverter updates every 5mins and BMS updates every few seconds which leads to the discrepancies in the on the pic attached, I have the source of each gauge labeled.
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