Over all I like your setup, very similar to things I'm doing, like the battery box.

     After the pool goes in consider some water heating panels like I built. You can see them in my diary. I just redid my system when I re-roofed my house. All clean with new black paint etc. I'm going to be posting a tutorial for Gary at BuildItSolar.com's request. The "make your own electricity" part of my system will be hooking it up to a Harbor Freight 12 volt water pump run off my HF panels. I will be asking for help then for a controller to have the motor run in spurts rather than continuos.