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Charging LiFePO4 near freezing & in cold?

PostPosted: Mon Aug 05, 2019 10:33 pm
by Jman
From all the reading I have done some sources of info say at 0 degrees C you can't charge & some say yes, you just cant at lower temps like minus10-20 C etc. Anyone know & have experience? What about 5-6 degrees C? should charge rate be lowered from the usual 0.3-04C rate?

thanks

Re: Charging LiFePO4 near freezing & in cold?

PostPosted: Tue Aug 06, 2019 6:15 pm
by davef
5C is the minimum that I am charging Winston at. I keep mine between 10-15C, it doesn't take much even in freezing cold (at the moment) Christchurch, NZ. A 25 Watt heater in a poly insulated box takes about 100W/H/day in winter.

The guy at electrodacus.com (Google groups) has a forum for his product and I think there have been several threads on battery heating.

Re: Charging LiFePO4 near freezing & in cold?

PostPosted: Thu Aug 08, 2019 6:04 am
by australsolarier
under 0 Celsius you can discharge a lifepo4 battery. but charging is not recommended. maybe trickle charging.

my power shed is insulated. and has airconditioner. the electronic devices keep that room warm over night. to give you an idea:
at the moment 5 degrees outside. inside the shed the floor is 13C, the ceiling 19C, the battery about 17C.
you might try to cover the battery with an old doona, maybe with a heating blanket underneath?