[RE-wrenches] LiFePo4 Low Temp Charging Damage

[Dave Angelini Offgrid Solar]

I doubt you will do any good with trickle charging at cold temps.  LFP is
too efficient and there is litlle self heating, so this will not work.

Probably need to use LA or roll the dice. An expensive mistake if you
lose.  Even heating pads need a fossile fuel source in cold country with
LFP powering a home. A duct from a heated home will also work but you need
to keep that home warm and power the duct fan. Not fun if you have to leave
the home for an emergency.


Dave Angelini Offgrid Solar
"we go where powerlines don't"
http://members.sti.net/offgridsolar/
e-mail offgridsolar at sti.net
text 209 813 0060

On Fri, 21 May 2021 08:44:04 -0700, Mark Frye <markf at berkeleysolar.com>
wrote:
> Folks,
> 
> If I have a charger that does not have low battery charge cut-off, I can

> get in trouble if I have a frozen pack and apply a charging voltage.
> 
> But, if I start with a pack that is above freezing and keep a trickle 
> charge on it, can I keep that pack safe from freezing and damage?
> 
> Or at some point, as ambient temperature drops, the pack will freeze and

> be damaged anyway?
> 
> Thanks,
> 
> Mark Frye
> 
> 
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