After analysing each panel's specifications, we determined the nine best solar panels and gave them a rating out of five across each of these key criteria: 1. Power 2. Efficiency 3. Product warranty 4. Performance warranty 5. Heat resistance 6. Eco-friendly credentials 7. Appearance You can see a further explanation of. The SunPower Maxeon 6 AC has a 40-year product warranty (SunPower) The SunPower Maxeon 6 AC is the best all-rounder in our test. It excels in the key areas of efficiency and warranty, and also performs well on power,. The ABC White Hole Series has a landmark 24% efficiency rating (AIKO) The 24% efficiency rate of AIKO's powerful 72-cell N-Type ABC White Hole Series panel is a new best for domestic. This panel's lifetime warranty is industry-leading (Project Solar) The average product warranty for a solar panel is 25 years, and some stretch to. This panel's peak power production is 91% more than the standard (Seraphim) The Seraphim SRP-670-BMC-BG's peak power rating is almost double the industry standard of 350W per.
