How Long Are Solar Panels Good For

5 hours x 290 watts an example wattage of a premium solar panel 1 450 watts hours or roughly 1 5 kilowatt hours kwh.

How long are solar panels good for.

Here is how the manufacturers come up with this number. They calculate a loss of efficiency of 8 for every year. Ways to increase the lifespan of solar panels. The general answer for monocrystalline and polycrystalline panels is 25 years.

When you re considering investing in a solar installation wondering how long home solar panels last is a question that inevitably pops up. Solar panels require regular maintenance which is essential to improve their efficiency and extend their lifespan. Generally solar panels appear to be extremely durable and come with a good warranty. Especially because your panels will not stop working after 25 years they just won t work as well.

To put your mind at ease studies have proven solar panels can last anywhere between 25 to 30 years or sometimes more. Most panels are covered to produce at least 80 of their rated output over the life of the warranty. The typical warranty for solar panels is 25 years. During this period manufacturers guarantee that panels will operate at or near peak efficiency.

However this doesn t mean the panels on your roof will stop producing electricity after a couple of decades. Hence failure to clean dust and smudges lowers the efficiency of solar panels. The regular warranty for photovoltaic solar panels lasts 25 years. Yes you read that right.

Chances are if you installed a roof top solar system today it would last longer than your roof. For the sake of example if you are getting 5 hours of direct sunlight per day in a sunny state like california you can calculate your solar panel output this way.