How many years do solar panels last? Typically, solar panel lifespan ranges from 25 to 30 years, making them a reliable, long-term energy solution. Over time, they experience minor degradation, reducing efficiency by about 0.5% per year. This means even after 25 years, solar panels still operate at around 80% of their original capacity. For those wondering, “how long does solar energ... https://solarsme.com/how-long-do-solar-panels-last/