Some of the most highly rated solar panels, as of 2015, are the Kyocera KD315GX-LPB and Canadian Solar CS6X-305M, according to LiveScience. The Grape Solar 390W panels are also well-reviewed.
The Kyocera KD315GX-LPB is highly efficient, and the company guarantees the output of these panels remaining at 80 percent of promised minimum power for at least 20 years. These panels also meet standards for withstanding loads and can hold up to 113 pounds of pressure per square foot. The efficiency rating of these panels is 16 percent.
Canadian Solar CS6X-305M solar panels have a reputation for durability, power and visual appeal. Homeowners seek out the rectangular shape of these panels, and these solar panels have an efficiency rating of 15.9 percent. Like the Kyocera, these panels can hold 113 pounds of pressure, but the warranty lasts for 25 years instead of 20 years.
The Grape Solar 390W solar panel comes with an efficiency rating of 15.21 percent and can hold about 50 pounds of pressure per square foot. These panels come with a guarantee of a 90 percent output for the first 10 years, then an 80 percent output for 25 years. These panels are available from Home Depot and Costco, and homeowners can find installers throughout the country.