How many years do sunpower solar panels last?

Sunpower solar panels

Sunpower solar panels are enough to meet the electricity needs of whole house. Once you start saving monthly then you can spend the money on different types of decoration. Each month you don’t need to take stress for high cost electricity bills.

How many years do sunpower solar panels last?

How many years do sunpower solar panels last? Solar panels will remain a best option as energy alternatives. Solar cells have been field tested in many installations. Practice has shown that the service life of solar panels exceeds 30 years. Photovoltaic plants operating in Pakistan and Asian countries for about 25 years have shown a decrease in the power of modules by about 10%.

Some typical sunpower solar panels which are manufactured by SunPower corporation and It is a famous brand in USA. They have developed well-reputed

  • crystalline silicon photovoltaic cells
  • sunpower solar panels

Although it’s a foreign brand but keep in mind, they may cost you really high. The best solution is then contact ZeroCarbon and we will be managing this headache with modesty. We will give you more enhanced features in the latest modules of solar panels.

How many years do Polycrystalline modules Work?

Polycrystalline modules usually operate for 20 years or more. Amorphous silicon modules (thin-film or flexible) have a lifespan of 7 (first generation of thin-film technologies) to 20 (second generation of thin-film technologies) years.

Thin-film modules lose 10 to 30% of their power in the first 2-4 years of operation, so usually new ones have a power reserve of about 17-25%. Crystalline silicon modules currently account for about 90% of the PV module market.

How quickly do sunpower solar panels lose their efficiency?

Typical power degradation of solar panels is 0.4%-0.6% per year. As stated above, thin film solar panels degrade faster than mono and polycrystalline panels. Below is a table with data on solar panel degradation produced before 2000 and after 2000.:

Solar cell category                                            Power loss per year, %

Produced by:                                         before 2000    after 2000

Amorphous silicon (a-Si)                                              0.96       0.87

Cadmium telluride (CdTe)                                  3.33      0.4

Copper Indium Gallium Selenide (CIGS)               1.44   0.96

Monocrystalline silicon (Mono-Si)                       0.47    0.36

Polycrystalline silicon (Poly-Si)                               0.61 0.64

What is the expected lifespan of sunpower solar panels?

As you can see, most of the manufacturers guarantee the operation of solar modules for 20-25 years, while the power reduction will not exceed 20% by the end of this period.

Many manufacturers give a guarantee for their modules for a period of 10 to 25 years. At the same time, they guarantee that the power of the modules in 10 years will decrease by no more than 10%.

Mechanical damage in sunpower solar system

Mechanical damage is usually guaranteed for a period of 1 to 5 years.

Crystalline modules have the most extensive operating experience. They began to be installed in the 50s of the last century, and mass use began in the late 1970s. Therefore, it is about the durability of such modules that we can already draw some conclusions.

What is life of crystal modules solar system?

The design life of crystal modules is usually 30 years. Manufacturers perform accelerated tests on the module’s operation in order to assess its real life. The solar cells used in solar modules themselves have an almost unlimited life and show no degradation after decades of operation. However, the production of modules decreases over time.

This is the result of 2 main factors – the gradual destruction of the film used to seal the module (usually ethylene vinyl acetate; EVA is used) and the destruction of the back surface of the module (usually polyvinyl phosphate film), as well as the gradual haze of the EVA film interlayer located between the glass and solar cells.

Role of Module sealant

Module sealant protects solar cell-sand internal electrical connections from moisture. Since it is almost impossible to completely protect the elements from moisture, the modules actually “breathe” you can say in easy words, but this is extremely difficult to notice. Ultraviolet light and temperature changes gradually destroy the sealant that protects elements and electrical connections from moisture.

Deterioration of modules from Moisture

Moisture trapped inside is discharged outside during the day when the module temperature rises. Sunlight gradually destroys the sealing elements due to ultraviolet radiation, and they become less elastic and more susceptible to mechanical stress. Over time, this leads to a deterioration in the protection of the module from moisture.

Moisture trapped inside the module leads to corrosion of electrical connections, an increase in resistance in the place of corrosion, overheating and destruction of the contact, or to a decrease in the output voltage of the module.

The second factor that reduces the module waste is a gradual decrease in the transparency of the film between the glass and the elements. This decrease is not noticeable to the naked eye, but leads to a decrease in the power of the module due to the fact that less light reaches the solar cells.

There is still no sufficient statistical data on this issue, since PV is a fairly new industry, and the vast majority of modules are currently in operation. They are made less than 10 years ago. However, the data that exist suggests that solar panels will work much longer than the 25 years promised by manufacturers:

Let us give you some interesting examples of using solar panels worldwide. The 33W solar panel (Arco Solar 16-2000) actually performs better than its specs promised after 30 years of operation.

The world’s first solar panel has been in operation for 60 years.

The maximum degradation is usually guaranteed by manufacturers to be no more than 20% over 25 years. However, measurements carried out on the modules actually working since 1980 show that their production has decreased by no more than 10%.

Many of these modules still work with the parameters declared during production (i.e., there is no degradation). Therefore, we can safely say that the modules will work for at least 20 years, and with a high probability they will provide high performance even after 30 years from the date of their start.

Modern sunpower solar panels technology has improved dramatically, and the solar panels sold today are even more reliable, stable and efficient.

All this means that when calculating the payback of solar power plants, the service life of solar panels is about 20-25 years, then you can say these panels generate electricity for free.

We are confident that high-quality solar panels will continue to work and generate electricity in 30 to 40 years after installation.

What can be done to increase the lifespan of solar panels?

Avoid physical damage to the panel (i.e. falling trees, branches, being blown off by the wind, scratching the module). The more scratches on the surface of the module, the less its effectiveness. In the worst case, moisture and water can get between the glass and the protective film and cause a short circuit and / or corrosion of the solar cell contacts.

Regular maintenance and cleaning is very important in every sunpower solar panel.

The more severe the climatic conditions in which solar panels operate, the faster they will degrade. Therefore, in some cases it makes sense to install wind barrier structures.

What is the lifespan of the other components in the sunpower solar panels?

Other components of the system have different lifespan: batteries have a lifespan of 2 to 15 years (average 4-10 years), and power electronics have a lifespan of 5 to 20 years (average 10-12 years).

These tips will help you to take a decision for buying solar panel systems. You get a clear idea about the lifetime of solar system.