I am looking to mount my solar panels on an uninsulated pole barn about 30m from my house.
Does it make more sense to route my 48V dc lines to my climate controlled house or should I build a climate controlled space for just my solar inverter/batteries in my barn?
Are there any off the shelf containers for battery storage? Like a chest freezer designed to keep the interior at 15c?
The system will be hybrid grid tied with about 7kwH of battery capacity. My house is very shaded, but the pole barn is not. That is why mounting panels on the house is not an option.
Lithium based batteries will perform poorly if they get too cold. How badly depends on the speceific chemistry but all will take a hit.
Depending on how DIY you’re going, you may want to look into Sodium Ion batteries. They are much much more tolerant to cold and still have full performance down to -40 degrees C.
From the little I’ve seen, Sodium batteries are far more temperature tolerant, but that comes with a significant hit to efficiency. Might not be worth it vs just insulating.