One could remove the tin on the south wall and replace it with something to let the sun shine through-free heat. Double sided plastic panels with airspace between for insulation would one option.
Removing tin is not an option as it provides stability for building. Not enough sunlight during winter months and would be of no help after dark.
Holy Smokes John, looking at the garage door opening it is full. That is your storage area, now you need to build a shop,lol.
I have other storage options when I get the time to play in the future workshop. Right now it's a convenience to just pack it all in for the winter.
Someday..........
John
