Battery SOC setpoint very low

[Clark Kent]

Thank you for the explanation. And if the optional second battery is present, it is completely outside of the BMS, correct?

That's correct as far as displayed SOC is concerned. The IBS is only on the main battery. The BMS won't be aware of the second battery per se but will sense the current draw of the 120S as a load on the main battery and respond accordingly.
Management of the second battery is done by the 120S hence Ineos call it the battery conditioner. Some owners have fitted a monitor to the second battery to keep an eye on the voltage.

 

[AaronS]

That's correct as far as displayed SOC is concerned. The IBS is only on the main battery. The BMS won't be aware of the second battery per se but will sense the current draw of the 120S as a load on the main battery and respond accordingly.
Management of the second battery is done by the 120S hence Ineos call it the battery conditioner. Some owners have fitted a monitor to the second battery to keep an eye on the voltage.

Awesome, thank you. I plan on doing just that.

Will it mess with anything if I also put a monitor on the primary battery?

 

[Clark Kent]

Awesome, thank you. I plan on doing just that.

Will it mess with anything if I also put a monitor on the primary battery?

No issues.