This is the only company I know of that has dealt with the low temperature charging issue.  Its a great product, and the blue tooth monitoring is an excellent feature too.  This is what the other Li+ batteries should be doing.  The big down side is they are currently limited to 12v.  Wish they made a 48v pack.

https://www.lifebluebattery.com/rv-boat-low-temperature-lithium-ion-batteries/index.html

Ray Walters
Remote Solar
303 505-8760

On 5/21/21 12:12 PM, Larry wrote:
My personal opinion is that you should not buy any lithium battery that does 
not provide adequate protection for all modes of operation.

Freezing does not damage the battery; charging a frozen battery may damage it 
quickly. Trickle charging the battery is not the solution.

There are two solutions: provide a heat source to keep the batteries above 
freezing or incorporate a temperature controller to disable the charger if the 
battery is unsafe to charge.

Larry Crutcher


On May 21, 2021, at 8:44 AM, Mark Frye <ma...@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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