So I decided the safest option was to set the cell size to 320ah and give the charging an extra hour. It charged to 98% (of what it thought was it's capacity) before the BMS shut it down. Now it's discharging. So I'll find out later how it gets on. Hopefully a full charge will help it square away. Perhaps the issue was lots of short cycling?
Seplos CAN BUS RS485 48v 200A 8S-16S BMS
- Thread starter Firechief
- Start date
No I didn't. Annoyingly the laptop I had connected went to sleep. Not sure why as I set it to stay on - will give it another go this evening
Hi all, I have a 280Ah battery and the 100A Seplos BMS; the inverter (Sofar ME3000SP) should be able to charge and discharge at 60-65A; however, while I have seen it discharging at 65A, in only charges at 50A
I’ve tried using battery monitor 2.1.9 and enabling ‘single BMS 1.0C charging’ whatever that means but it still only charges at 50A (even at low SoC)
I’ve tried using battery monitor 2.1.9 and enabling ‘single BMS 1.0C charging’ whatever that means but it still only charges at 50A (even at low SoC)
I have that inverter. Go into the battery settings (code 0715) and just raise the charge/discharge amps. You can charge at 65A and discharge at 70A. If it doesn't work you can power cycle the inverter and it should work
It’s already set to 65A
How do I power cycle it? Is it disconnect grid, disconnect battery, reconnect battery, reconnect grid?
Yeah disconnect the mains first. Then turn off the battery. After a few seconds the inverter should turn off. Then restart the battery, it'll come on. Then turn the mains back on. It'll say "wait 60" and count down to 0. Then you're good to go.
Have you cycled the battery on and off? Have you set the battery setting on 2.1.9 to Sofar?
I have disconnected the battery until the inverter turned off and then reconnected
2.1.9 is the bms pc software version that I’ve used to enable the ‘single BMS 1.0C charging’ option, but nothing to do with Sofar
Ah yes, that was already set
Steve_Rutland
New Member
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- Dec 4, 2022
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After a few days of logging I managed to pull a big file and chart the data. This is a full day from normal running, discharge and charge cycle. I can see some differences in the cells - but at those voltages they are basically fully empty anyway.
I don't see them being fully charged. The voltage should go to at least 3.45V for that. This is needed in order to confirm two things:
1) You are fully charging the battery
2) The top balance is still good
Get the capacity changed once again and run the battery till BMS high-voltage disconnect.
1) You are fully charging the battery
2) The top balance is still good
Get the capacity changed once again and run the battery till BMS high-voltage disconnect.
thats a go
thats a good point. I am not getting the high alarm, its dropping out before fully charged. What's weird is the cells are 280ah cells - they should be getting fully charged given they are charging at 65A for 5hrs
