Re: [Vo]:Fresnel focused solar

[Mike Carrell]

The higher the concentration, the more accuracy required in the sun tracker. 
An eqitorial mount, where the rotation axis is parallel to the earth's axis 
at the installation location, is a good start. However, as the seasons 
progress, the sun's elevatiion changes, so the tracker must operated in 
three axes. If you want to place the array on an arbitraily placed roof, it 
gets more complicated. All can be solved and cheap computers can do the job, 
but it does get complicated and is a non-neglible cost to the approach.

Mike Carrell