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buck boost and LiFePO4 - best settings

I would like to know the best settings for my 50A buck boost and LiFePO4 smart battery LFP-Smart 12,8/150.


First things I changed was within TSConfig:

20: Output voltage from 14,4V to 14,2V (recommended for LFP-Smart 12,8/150)


31: Battery voltage charge protection (10.0V (out) and 20A)

The problem is, that the voltage at my battery (connected at AB from BMS12/200) is at first try lower than 10,0V


50: Converter on/off by input voltage


I tried to reduce the Switch off delay from 1 min to zero (no load from starting battery after switch off).

But this is not working – it’s like pumping (on – off – on …).

1 minute of 50A from starting battery will not hurt – hopefully


Are there more important configurations to change in my setting with LFP-Smart and BMS?


THX for any help

BMSLithium battery Smartdc dc converters
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2 Answers
Matthias Lange - Service Team Döbeln DE avatar image

31 is for the output not the input

To prevent discharging the starter battery after the motor stops you should set the 24 higher.

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THX for your feedback :-)

You are right - 31 is regarding the output (monitor 3) but nonetheless I disabled the 31 to always start with maximum output current.

Regarding 24 I will give it a try.

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This are my actual settings:


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