Battery Question

FWC wrote:

Why would you not be able to turn on the furnace at -30?

PS, I winter camp extensively with my LiFePO4 batteries and have used LiFePO4 batteries well below -30 (just not in my camper).

Rather confusing response. I suppose a LiFePO4 could/will provide enough power to run a furnace fan at extreme low temps.
The challenge is in charging them unless the battery temperature is high enough.
So batteries inside camper, camper furnace keeps them warm, your power source charges them.

Not sure what you mean you use yours extensively at -30 but not in your camper. That is what we're talking aboot here, isn't it?

I use and charge a LiFePO4 battery in well under freezing ambient temps as well, but the battery receives heat from my engine (sno-bike). If it was exposed to open air and snow it wouldn't charge, while riding.

So your position is LIFePO4's are good for extreme cold camping?

I'll leave this quote from Battleborn, the "gold standard"

"At 25° F, a Battle Born battery will no longer accept a charge. This is to preserve the cells in the battery, and the internal BMS will allow a recharge when the temperature is above 32° F. Every single battery that we assemble has this intelligent internal BMS."

Sounds like it's possible to nurse your LiFe's through the cold, but that was my point, why fiddle around with it for "extensive" cold weather use?

Maybe you could expound on your processes to keep your LiFe's able to charge when your using them at -30.