Ground Mounted SWH Systems.
Likely, the best solar window at your site will determine whether your solar water heating(SWH) system is roof-mounted or ground mounted. Both have their advantages and disadvantages.
Since the ground-mount is independent of the roof, any concerns associated with the strength of the roof for supporting solar collectors are eliminated. Using a ground-mounted array also minimizes the safety risks associated with installing equipment on an elevated surface. Tilt racks are commonly used in ground mounted systems and provide the owner with an opportunity to install the collectors at an angle that best suits the application.