I love that simple setup too Gary. Unfortunately, the garage door is not facing south. The main garage door faces east (towards the bottom of the picture).
The other thing I have to contend with is afternoon sunlight. The house will block a lot of sun come afternoon. I haven't done any analysis to see at what time the sun stops hitting the southern wall of the garage.
On the up side, I just got back from the local electric vehicle build day. One of the guys there is a recycler and just got a truck load of thermal pane windows that someone was scrapping. I got 16 windows total, so I have some nice glass for projects (or window replacement, I only have single panes upstairs).