Solar panels typically last 25 to 30 years, but they don't just stop working after this timeframe. The panels gradually become less efficient and lose about 0. 9% of their capacity each year. A decade-old panel still. Typically, the lifespan of solar panels is anywhere from 25 to 30 years, making them a remarkably durable component of solar photovoltaic (PV) systems. This longevity surpasses that of many other household systems, such as boilers, which usually have a life expectancy of 10 to 15 years. The good news, however, is that they degrade very slowly and can produce electricity even decades later! This doesn't alter the fact that solar panels do lose. For utility-scale solar developers, EPCs, asset managers, and financiers, the performance and durability of photovoltaic (PV) panels directly influence project bankability, return on investment (ROI), and long-term asset valuation.