Actually tilted fixed facing South does still collect during the shoulder hours, but you have to lower the panel from noon's best angle to get your single "optimum" tilt for the whole day.
If you do twirl it during the day, tilting is the opposite--highest earlier and later, and lowest at noon.
EDIT- must be time to inflict my old info on all that on the world again... :)
http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/27734213/srt/pa/pging/1/page/1.cfmWith fixed South, it is possible to have the tilt so high near sunrise and sundown that the sun is "behind" the panel, but the amps then are so little, you aren't missing anything really. Macslab has a bunch of info on "optimum tilt angles" by season and location (latitude) to help with that.
There are contraptions for the roof mount that you can operate from the ground but the OP is not likely to be going that route.
The OP does not have a lot of roof real estate with a TC, so his basic idea makes sense. I "feel his pain" trying to run a 120v fridge off- grid in a TC :( It is a nail-biter all the way. Cloudy days can mean turning the fridge off and using it as an ice-box--if you can get ice. :)
