this will seem like over kill in a big way, however it also shows what you can do with them.
http://www.treehugger.com/files/2009/07 ... c=daily_nl
it shows how flexable these are and what one can do I here you can buy them prity cheep.
I also remember reading in Home Power Magazine about a man who had power in his trailer. Meaning solar collectors and batteries and when he went to his cabin the trailer became part of the house and was it's electrical source.
Your trailer could become more then an escapte Pod it could become a Power wagon and bedroom for a larger structure. So if anyone else found theat container it would be useless to them it would seem more like a uncompleted build.