I'm VERY interested in how you work this out. I delayed building my own coop and cheated--put 'em in a stall in the barn...'cause I could!!--because I'm recycling an old building and I wasn't satisfied with my plans. I've learned more and I'll be including different things in my 2010 coop because of threads like this one.
Here's MY situation:
I put up a temporary coop last summer, and I'll be adding on to it. It's high enough not to puddle when it pours, and other reasons why the location is good.
see post-
https://www.backyardchickens.com/forum/viewtopic.php?id=185353
In addition, it (will be) about 5-6 feet from an outdoor outlet. But I don't want to plug into it for the coop. It isn't safe--it LOOKS crummy to have an extension cord, kind of like my birds live in a run down trailer park!! THAT's why I was thinking solar. I have some questions, though. For instance,
--How much is
your total cost?
--Will high winds damage/destroy/remove your solar panels?
--Do you need to protect your panels by, maybe, creating a plexiglass "greenhouse" for them?
--How long will the panels be viable before they need to be replaced?
Right now I have a light on during the day for my birds. I plan to use solar like my "fairey lights", the uber cheapies that last about 4 hours from light on a sunny day, and keep me from tripping around my fencing in the dark.
BYTHEWAY--you have an awesome site on BYC, and also your link to your personal webpage. Your runner ducks and mandarin ducks pictured there are V E R Y T E M P T I N G, since I might "take the plunge" and buy some ducks in the future. Interesting duck facilities--I like your reasoning.