Guangdong Prostar New Energy Technology Co., Ltd.

The solar panels lifespan

Solar panels lifespan typically come with 20 year warranties that guarantee that the panels will produce at least 80% of the rated power after 20 years of use.

Solar panel manufacturers put a lot of effort into making their solar panels robust. They need to be able to withstand heat/cold cycles and heavy weather. However, solar panels are not perfect and they will inevitably age. Keep reading to find out how age affects performance and what this actually means.

How fast do solar panels degrade/lose their efficiency?

The rated power output of solar panels typically degrades at about 0.5%/year. However, thin-film solar panels (a-Si, CdTe and CIGS) degrades faster than panels that are based on mono- and polycrystalline solar panels lifespan:

Solar cell typeOutput loss in percent per year
 PrePost
Amorphous silicon (a-Si)0.960.87
Cadmium telluride (CdTe)3.330.4
Copper indium gallium selenide (CIGS)1.440.96
Monocrystalline silicon (mono-Si)0.470.36
Polycrystalline silicon (poly-Si)0.610.64

Solar panels typically degrade faster in the first couple of years of their life.

What is the life expectancy of solar panels?

Below is a chart showing different solar panel warranties on the market today. The different manufacturers guarantees that the performance of their solar panels will stay above the following ranges:

Solar Panel Warranty Comparison

The majority of manufacturers offer the 25-year standard solar panel warranty, which means that power output should not be less than 80% of rated power after 25 years.

What will happen to my solar panels after 25 years?

The truth is we don`t really know – there`s not really a lot of data to look at since photovoltaics is a relatively new technology (the vast majority of all solar panels are less than 10 years old).
However, from what we are seeing so far, we have reason to be excited. Here are a couple of interesting reports:

The technology has improved, the solar panels on today`s market are more robust and durable.

This is where it gets really interesting. What does all of this actually mean? The lifespan of a modern solar panel is far longer than the 20 years that we use to calculate costs and earnings. This basically translates into more money in your pocket.

I would bet that a solar panel installed today would be up and running (and still generating a good amount of electricity) 30 – 40 years down the line.

What can I do to extend the life of my solar panels?

RELATED SOLAR PRODUCTS

Prostar PMS230W 24v mono solar photovoltaic panels 230 watt rating
Prostar PMS150W 12v 150 watt solar panel mono alternative energy
Prostar 12v 36 solar cells mono 80w solar panel cost

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