I like the mount design and the controller board looks good too (kinda like a RedRock).
But I can't tell about the actuator.. Does it have limit switches built in?
If you do your demos indoors (no sun), then you will need a 120ac PS,
but if you do them outdoors, you should let the PV charge the mover battery.
Self-motivated.. More impressive.
I use a cheap 10w panel power my old tracker.
http://ecorenovator.org/forum/solar-...r-project.html
I think the panel actually does about 5W, but the battery is always charged..