I certainly don't mind a challenge, and our location would be perfect for wind. But I don't own the site and only rent the ground the container sits on, so anything would have to be roof mounted and as you point out it gets very expensive and not really worth the money, I think!

The container is in the middle of a field, up against some old barns. We positioned it with Solar in mind so it is generally south facing with nothing shadowing the panels. I had thought 100w would be enough, but I am starting to think I need something like 200w.

The nearest connection point to the grid is about 400m away, and due to the nature of storing explosives it really needs to be low voltage anyway

Cheers

Cris