Here are two basic engineering question that apply to most solar projects.
- At what tilt should the modules be mounted?
- Should the orientation be “portrait” or “landscape”?
Getting the answers right should be part of every design engineer’s Quality Assurance process. They also are important to the system owner, because in some ways the solar installer and the project owner may have opposing interests. And decisions driven by the wrong reasons can mean the difference between a project that successfully produces and meets expectations for decades, or doesn’t.
Tilt is the angle of the module to the horizon. Usually modules are installed with a tilt of 5 degrees or as much as 30 degrees.
Orientation of “portrait” means the module is mounted with the short side parallel to the ground. Like a portrait painting. “Landscape” is the other way, with the long side parallel to the ground. Like you are looking at a landscape painting.