robtillaart:
nice project!
Have you measured how much energy the tracking costs and how much the extra gain is?
And if you would only have one motor?
I wish I had a copy of my old program.."solar.bas" that was on many old BBS's and more than one Public Domain software CD's. My program calculated the output (in wattage) difference between panel alignment settings. The misaligment of a panel by as little as 5 degrees was significant, especially during the winter months where the solar day is short. Dig around and try to find that program, I had included all source code and permission to copy, etc.