My electrical panel is in the garage. Knowing my existing plans to add solar panels, a generator and transfer switch that's the only place battery pack(s) could go. Except it will be above the max temperature for a good period of time, and even below the minimum other times.

Sure, there could be some trade off where it makes sense to add heat and A/C to my garage (and appropriate insulation) based on the economics. But, that's even more I need to spend.