Building A Solar System Array. Part 2: Energy Storage? The Lithium Battery Is Here!

This video is now a month or so old, but I finally decided to purchase a Lithium battery for my 1.2KW Solar setup. This thing is massive in both weight and capacity coming in a 200lbs, and having a reserve capacity of 200AH or 5.3KWA at 24 volts.
I hope to double the side of the system and add a second battery in the next 12 months, but with the cost of this setup skyrocketing, I'm not sure I will be able to pull it off.
In the meantime, I'm finishing up a "Dog house" to store all the solar equipment in, and have installed the racking to put the panels on. It's been a steep learning curve for me as there are a lot of math equations in this, and I find it hard to visualize math issues as simply as I do mechanical ones.

I do have a question for those that are more experienced. This battery cannot be charged under 28F or it may be damaged. How do people go about keeping these things warm in the winter? I haven't found anything of use online about it, and winter is coming!

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