Is it worth having modules that track the sun?
In general, a typical roof installation is not suitable as a tracking system. The roof cannot be rotated and the modules are usually mounted as a fixed installation. Where there is freedom of mobility however this option should be considered. On the one hand, tracking can increase the energy yield by up to 15% whereas on the other this does entail extra costs. Moving parts are subject to wear and can fail. Without tracking, a PV solar energy installation needs almost no servicing.
