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Seplos bms bluetooth version

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craka

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Apr 8, 2023
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Australia
Hi,

I've just recently set-up a growatt spf 5000 es and a seplos diy battery that has the Bluetooth bms.

The default bms setting for battery capacity was 200Ah which I've changed to 280Ah , which is the capacity of the battery, however along side this setting is SOC in Ah , as attached in the photo marked red. Do I need to also adjust this setting as well?
 

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craka said:
Hi,

I've just recently set-up a growatt spf 5000 es and a seplos diy battery that has the Bluetooth bms.

The default bms setting for battery capacity was 200Ah which I've changed to 280Ah , which is the capacity of the battery, however along side this setting is SOC in Ah , as attached in the photo marked red. Do I need to also adjust this setting as well?
Click to expand...
Is this the v2 or v3 Seplos BMS?
 
I'm unsure , I just know it the Bluetooth version.

This is the app I downloaded for it BMS_1.0.24.apk

I believe it is the 10E version
 
Last edited:
Soc is the state of charge so of the battery is fully charges it would be 260 in your case

If its at 50% then it would be 130
 
You need to fully charge the cells to they hit 3.65 best to manually charge them unless you have an active balancer
 
craka said:
Hi,

I've just recently set-up a growatt spf 5000 es and a seplos diy battery that has the Bluetooth bms.

The default bms setting for battery capacity was 200Ah which I've changed to 280Ah , which is the capacity of the battery, however along side this setting is SOC in Ah , as attached in the photo marked red. Do I need to also adjust this setting as well?
Click to expand...
Worked with Seplos on this, they said it's a mistake. It should be %, not ah. It's not a setting that needs to be changed.
 
Last edited:
It absolutely is a setting you can change and its supposed to read Ah, if you freshly top balance a pack to 3.65v per cell, you assemble the pack, plug in the BMS, set the capacity to 280Ah if that's your pack size and set the soc to 280ah, that sets your calibrated pack to 100% soc which is reflected in the dashboard.
 
shavermcspud said:
It absolutely is a setting you can change and its supposed to read Ah, if you freshly top balance a pack to 3.65v per cell, you assemble the pack, plug in the BMS, set the capacity to 280Ah if that's your pack size and set the soc to 280ah, that sets your calibrated pack to 100% soc which is reflected in the dashboard.
Click to expand...
Tell that to the Seplos techs. He clearly stated that it is supposed to be %. When they tried to correct it, they came back with the fact that the code isn't even using that setting.
 
Tulex said:
Tell that to the Seplos techs. He clearly stated that it is supposed to be %. When they tried to correct it, they came back with the fact that the code isn't even using that setting.
Click to expand...
It does use that code, try it on yours, open the BMS software and change the SOC Ah to a lower value youll see it reflect the SOC in the main dashboard.
 
I asked the tech about what you said

"It absolutely is a setting you can change and its supposed to read Ah, if you freshly top balance a pack to 3.65v per cell, you assemble the pack, plug in the BMS, set the capacity to 280Ah if that's your pack size and set the soc to 280ah, that sets your calibrated pack to 100% soc which is reflected in the dashboard."

I asked if this is correct, he replied:

Hello, no, this function is added here by us and does not need to be modified.
If you want to modify the SOC, you need to modify the remaining capacity. If you modify it, you need to do a charge and discharge cycle on the battery again. Because this SOC has errors, you need to do a charge and discharge cycle again to make the SOC accurate.
 
Last edited:
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