Is a 5 year ROI really that crazy? Seems very reasonable considering lifespan of solar is more like 15-20 years (or more).
Mine are guaranteed to output 80% of their rating after 25 years.
In the real world panels that old are putting out 85%
alt Hacker News
Mine are guaranteed to output 80% of their rating after 25 years.
In the real world panels that old are putting out 85%