I haven't been here in awhile, hope all has been well.
I had always wanted to mention something that I have had experience with, but which unfortunately, I have yet to see mentioned anywhere in any of the literature/instructions on solar etc. And that "something" is (drum roll) . . . ANTS!
I live in the southeast, where solar power etc. isn't yet as popular as in most other sections of the USA, but where ants are (and this may explain the above lack of info).
In any case -- to cut to the chase -- when I first put up my own solar stuff, I quickly realized (and remembered) that ants LOVE electricity -- something to do with the magnetic fields or what not. And since I have 12-volt systems, I had a structure built away from my house to contain the charge controllers, batteries, and inverters so that the solar panel lines would not have to go very far. That way, I have long, heavy duty AC extension cords to my house, which being AC, have less power loss.
I didn't realize or remember this fact about ants being attracted, though, until I saw the little buggers crawling into this space (which isn't airtight or anything) and had even started invading my equipment.
Fortunately, having been a small-time organic gardener for some time, I had become familiar with a sticky-goo stuff called Tanglefoot(brand name) pest barrier. I put this stuff around my structure (and inside it too, away from the equipment but surrounding it), and it solved my problem pronto. If you get this stuff on your body (which I have many times), you practically have to scrape some of your skin off to get it completely off! So it is very sticky !
If anyone else has had this problem, or knows how to solve it (without using tons of chemicals) it would be neat to hear about it. The black ants that I almost had a problem with are very plentiful where I live, and without the sticky-goo, I cannot imagine any other solution that wouldn't entail a very toxic strategy. Organic pesticides are very effective, but they would have to applied and reapplied repeatedly, as they biodegrade usually very quickly, and do not persist long in the environment.