BP Solar, BP Monocrystalline Solar Panels
The product spec actually says 93% for 12 years and 85% for 25. That is awesome! They are willing to guarantee 80% up to 25 years. Since they don't want to pay out, they must have set that low and expect the majority to be above 85%.
OK, I'll admit they will also expect some people not to notice and claim, but overall it just shows how good this stuff is becoming.
