The Lifespan Of Solar Panels

3 November 2020 Posted by vmotta Knowledge

Photo-voltaic solar panels represent an excellent investment, due to its period of duration; the long life of the solar panels is one of its most remarkable characteristics, considering that these must be out in the open, supporting long periods of high temperatures, plus rain and other environmental conditions.

How does the process of degradation of photo-voltaic solar panels affect the warranty?

Solar panels normally degrade faster in the first couple of years of your life. Solar panels are increasingly popular as a way to use the sun’s energy to conduct electricity that, in turn, operates electrical appliances in the home or workplace. It is expected that the newest models of solar panels on the market will have a useful life of 40 years, although they rarely have warranty of more than 20 or 25 years.

With care and attention, solar panels can really last forty years after installation, even if their performance deteriorates, even if there is no noticeable deterioration. The life expectancy of forty years is for mono-crystalline and poly-crystalline panels, regardless of the watts they produce; These still generally have warranty of up to 25 years and, possibly, will last much longer.

Some solar panels can produce 80% of their initial capacity after forty years of use.

How long is the warranty for the operation of photovoltaic solar panels?

Most manufacturers offer the standard warranty of 25 years, which means that the output power should not be less than 80% of the rated power after 25 years. This does not mean that the panels will stop working after that time, simply that their efficiency will decrease, as we mentioned before, at around 0.5% per year.

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The average lifespan of photovoltaic solar panels according to their type.

Polycrystalline Silicon Solar Panels have an average life of 25 years, the same as the warranty period. On the other hand, Mono-crystalline Silicon Photo-voltaic Solar Panels have a useful life of 30 years. In the case of Thin Film Solar Panels, the service life is drastically reduced to only 12 years.

Image Credit: & Trina Solar

The average efficiency of modern solar panels is around 14%. The efficiency of solar panels often depends on how well they were installed and how well they are maintained. It is very important to make sure that the solar panels are not placed where they will be shaded by trees or other objects so that the solar panels work as close as possible to their efficiency index.