Swiss Solar Tech installed our solar panels for our new build, in August 2018. We did not know anything about solar energy, and Roger was extremely knowledgeable about what exactly we needed to do. He met with us and he provided us with in-depth data to show how our east and south facing roof line would be the best place for the panels, and how the solar energy would work. He worked with our builders electrician to ensure that the proper electrical supplies were installed. The installation went in flawlessly. The invoice was exactly what the quote was , and there were no surprises. The web app that they provide, is also very good, as we can see how our solar panels are performing. We highly recommend this company as they are very knowledgeable about solar energy.