Nice setup. You are pretty far south compared to me. I have to tell you that here, at 46.5° N Latitude, in January and December the panel output is negligible — enough to maintain the bank at full charge but not enough to bring it up from a discharged state in any reasonable time, especially when overcast/foggy. Plus, the T-105 batteries being so dang cold have a lot less oomph. The other thing we have to deal with is 70 mph gusts off the mountains trying to rip panels off mounts. But at least we won’t have to deal with hoards of zombies.
Seems like a small wind generator would be perfect for ya.