In a direct comparison with fixed-tilt solar installations, rotating systems will virtually always be more expensive. This is due to a few factors. First of all, tracking panels have parts and machinery which are costlier to produce than the stationary variety, particularly for systems that track the sun on more than one axis. The. Because they have no moving parts, fixed-tilt solar systems require little care other than an occasional inspection. Rotating panels, on the other hand,. Photovoltaic or PV systems are often installed on roofs, as this can be effective in keeping the panels in full view of the sun. With some roofs, however, this may not be a viable option, due to the building's orientation, the roof's construction or overhanging trees and.
