I haven't any issues with temperatures. Highest was 112 in AZ and lowest was 26 degrees. The battery compartment (where the generator would normally reside) shares a wall with the heated basement so the batteries are somewhat heated. Checking in the morning the bank has never been below 40 degrees.
With LFP you can discharge your batteries at pretty much any temp but if you are in extreme cold and the batteries themselves do drop below freezing you shouldn't charge them, at least with anything more than a small trickle. If extreme cold is something you like it would be better to heat the compartment or move them inside.