As of 2015, solar panels produced by Kyocera, Grape Solar, Canadian Solar and Sharp all generally receive good reviews. The Kyocera KD315GX-LPB 315-watt solar panel was ranked as the top solar panel for 2015 by LiveScience.com and TopTenReviews.com, while Solar-Nation.org ranked Kyocera as the third-best manufacturer of solar panels.
This Kyocera solar panel ranks among the most powerful panels on the market in terms of wattage, and it is also highly efficient in terms of the amount of energy it can create per unit of surface area. The panel is durable, being able to withstand 1-inch diameter hailstones in 51 mph winds without being damaged. It also comes with Kyocera's five-year limited warranty.
Canada's premier manufacturer of solar panels, Canadian Solar, produces a number of highly rated solar panels, including the CS6X-305M and CS6K-P-PG models. The CS6X-305M was ranked as the second-best solar panel for 2015 by LiveScience.com, which noted that the model is only slightly behind the Kyocera panel in terms of efficiency. Canadian Solar backs this panel with a warranty that guarantees at least 95 percent power output for the first year and at least 80 percent output for 25 years.
Grape Solar produces a variety of well-rated solar panels, including the 250-watt and 390-watt models, while the Sharp ND-Q245F, ND-F2Q235 and ND-R250A5 solar panels are also quite well reviewed.