100/20 MPPT and Smart Battery Sense protecting battery from charging when freezing

DIY
1

I have a motorhome with a LiFePo battery. The BMS in the battery does not prevent charging when below 5 degrees C.

Can I confirm that a Victron 100/20 MPPT will shut down charging at low temperatures if I fit a Victron Smart Battery Sense and connect these two units by Bluetooth?

2

Wow. That’s sketchy. No low temp disconnect is a big risk.

Yes, you must program the MPPT to stop charging at the temp you want(40 F recommended) and use the SmartBattery Sense installed on the battery for temp data. You will need to create a network in the MPPT and add the SmartBattery sense to the network to share its data. I am assuming you have a SmartSolar not BlueSolar MPPT. A BlueSolar MPPT will also need a VE Direct Dongle.

3

Confirmed that is works.

A demonstration

4

Thanks for your help. It’s good to get confirmation.

Best wishes.

Roger

5

Hi LX,

Thanks for your reply and the link. That’s a real help.

Best wishes.

Roger

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