I installed solar panels from A1 Solar Store about seven years ago, and I can say that their life cycle is impressive. You can review them on the site https://a1solarstore.com/solar-panels/arizona.html, too. The first thing to keep in mind is that most panels come with a 25-30-year warranty, but in practice, they can last longer than that. I think it is important to maintain the panels properly to extend their life. For example, I regularly clean them from dust and debris, which helps keep their efficiency high. A few years after installation, I noticed a slight decrease in performance, but this is normal for all types of solar panels. They lose about 0.5-1% of their efficiency every year. This means that after 25 years, they’ll still be running at 75-80% of their original capacity, which is pretty good.