I put up a thread a while back showing the pod frame, here it is completed.
It means I don't have to use shed space for the car and gives added security - no doors.
At present it is key operated but will be also be operated from the car when I get around to building a transmitter interface.
The power is from a 600kg capacity 12V winch with pulleys to multiply its capacity and a suspension spring system as a counterweight. The battery for this is topped up from solar power and hasn't needed charging yet.
http://www.youtube.com/watch?v=zIXaf-ykAY8