My first post on BYC, and I hope I'm doing this right 
I am in need of some help in choosing an automatic pop door opener for the coop, opening into the run. Please help me figure out the best solution.
I've got 2 doors, one for summer ventilation (welded wire fabric window) and the other for winter (seen in the pic to the left of the door).
There's no electricity to the coop, so I would need a battery-operated unit or super simple solar setup. I've narrowed my search to the Chickenguard or the Adorstore unit. The advantage of the Chickenguard is that I can use my own doors, but cost-wise if I replaced my doors with the Adorstore metal unit it seems a better deal in the long run (wood rots).
I just don't know what to do. Advice please?

I am in need of some help in choosing an automatic pop door opener for the coop, opening into the run. Please help me figure out the best solution.
I've got 2 doors, one for summer ventilation (welded wire fabric window) and the other for winter (seen in the pic to the left of the door).
There's no electricity to the coop, so I would need a battery-operated unit or super simple solar setup. I've narrowed my search to the Chickenguard or the Adorstore unit. The advantage of the Chickenguard is that I can use my own doors, but cost-wise if I replaced my doors with the Adorstore metal unit it seems a better deal in the long run (wood rots).
I just don't know what to do. Advice please?