A:There are different types of racking system for your solar panel.
Rail-based mounting system. •
Ballasted mounting system. •
Anchored mounting system. •
Residential roof. • Standing-seam mounting system: •
Corrugated roof mounting system. •
Fully-railed system or Shared-rail system. •
Rail-less mounting system.
I will suggest you have to choose by your needs, not by price range or company.