How long solar panels will last, What is the Lifespan of a Solar PV System? Or What's the life span of regular solar panels?
On an average the life span of the available in Australian market is around 25 years,
"Solar PV Systems typically come with a warranty of 25 years and guarantee that the solar panels would produce at least 80 per cent of the power after the end of the warranty period. However, these specifications can vary depending on the manufacturer."