SunPower Maxeon provides the most efficient solar panels on average, with a minimum efficiency rating of around 20%, which is higher than some competitors' top efficiency ratings. Solar panel efficiency refers to how effectively a panel converts sunlight into usable electricity. Higher efficiency means more power from less space, which is crucial for businesses aiming to maximise energy production on limited roof areas. After reviewing hundreds of solar panel models, we found five brands that lead the pack: CW Energy, Maxeon, Qcells, SEG Solar, Silfab, and CertainTeed. Clicking “Get Your Estimate” submits your data to All Star Pros, which will process your data in accordance with the All Star Pros Privacy Policy.