question

Free Tammi avatar image
Free Tammi asked

LiFePO4 float/absorption under 0 Celsius

Hi I wanted to ask if it normal for the MPPT to display 14.2v absorption / 13.5v float at temperatures under 0Celsius? We have a LiFePO4 battery with an internal BMS so we're assuming that the BMS has done a lockout preventing charge and that the solar panels are simply using the connections to the battery as a bridge and only using solar energy as the main voltage?

Also, any advice on trying to keep the battery warm above 5Celsius? How long would it usually take for the battery to accept charge again?


screenshot-20221209-145307.jpgscreenshot-20221209-145321.jpgscreenshot-20221209-145314.jpg

MPPT ControllersLithium Batterycharger
1 comment
2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

klim8skeptic avatar image klim8skeptic ♦ commented ·
Array Voc of 152.19v = warranty void.
1 Like 1 ·
1 Answer
snoobler avatar image
snoobler answered ·

Not all LFP batteries have low temp charging protection. Have you confirmed that yours does?

Your performance data is pretty inconsistent.

and of course, @klim8skeptic 's point... > 150Voc on a 150Voc controller may destroy it.


2 |3000

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Related Resources

Additional resources still need to be added for this topic

Battery Compatibility

Did You Know - How to create a battery profile for non-Victron batteries?

MPPT Product Page

MPPT Error codes

MPPT 150/60 up to 250/70 Manual

Additional resources still need to be added for this topic