question

Michael Ziegler avatar image
Michael Ziegler asked

Will the BMS cut off low temperature charge from MPPT to lithium Batteries

I have seen what appears to be two contradictory answers to this question - can someone give me a definitive answer ? Thanks


screen-shot-2022-01-10-at-232023.jpg

screen-shot-2022-01-10-at-232141.jpgThis is my system .....if the BMS does not control low temperature cut off - I think I can connect the temperature on the Smart Shunt and the MPPT should receive temperature, along with Current and voltage on my VE. Smart Network?


dc-wiring-jan-10-2022.jpg


MPPT SmartSolarBMSSmartShunt
screen-shot-2022-01-10-at-232023.jpg (87.8 KiB)
screen-shot-2022-01-10-at-232141.jpg (69.2 KiB)
dc-wiring-jan-10-2022.jpg (919.6 KiB)
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1 Answer
Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

What batteries and BMS do you have?
Is the wiring diagram from your system?

The VE.Bus BMS will open the "charge disconnect" in case of a low battery temperature.

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Michael Ziegler avatar image Michael Ziegler commented ·
Yes this wiring diagram is my system - thank you
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Michael Ziegler avatar image Michael Ziegler Michael Ziegler commented ·
The BMS successfully disconnected the MPPT at 5C - but I batteries are now back at 8C and we have good sun - but the MPPT is still disconnected. Am I supposed to do something to reconnect the MPPT so that it will charge?
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