One in five solar panels is degrading faster than expected, posing a challenge to the long-term viability of solar farms. This issue is particularly concerning as most solar systems are designed to last about 25 years, with a gradual loss of efficiency. However, research has found that a significant number of panels are experiencing a much more rapid decline in energy-generating powers.
The problem is thought to be linked to minor manufacturing flaws, such as tiny hairline cracks, that were missed during quality control testing. These imperfections can cause panels to degrade at a faster rate, with some systems experiencing a decline in performance that is 1.5 times faster than the standard rate. In some cases, the useful life of a solar panel could be as short as 11 years, rather than the expected 25 years.