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How Long Do SunPower Solar Panels Last?


SunPower is the best option if you’re looking for a solar panel with a long lifespan. The amount of electricity that a solar energy system generates over its lifetime can vary depending on the suppliers, materials, and innovations. The photovoltaic cells inside a solar panel determine how long it will last.

Concerned about the length of time your solar panels remain 100% functional? Solar panels typically have a lifespan of about 25 years, even though different factors can affect how quickly they degrade.

The amount of energy you will be able to produce must be estimated if you are thinking about purchasing a solar energy system for your residence. Depending on your circumstances, it might be more cost-effective to invest in a rise-efficiency device that offers longer-term energy savings.

Why Do Solar Panels Degrade?

The deterioration time reduces the operational effectiveness of solar panels, just like other electronic gadgets. The system’s inverters and batteries are more likely to need replacement before the solar panels.

The physical harm that results from being exposed to the elements is the main danger causing solar panels to degrade. Some solar panels may become brittle due to extreme temperatures, which increases the chance of moisture getting inside the module.

The expansion and contraction of the solar cells due to the climate can weaken the internal cell. In cases of strong winds and sloppy racking, the panels may experience ongoing vibrations. The bonding among internal components may deteriorate due to vibration, which will reduce the panel’s effectiveness.

What Is the Lifespan of SunPower Solar Panels?

99% of SunPower’s panels must produce at least 70% of their power to have an operational lifespan of SunPower panel more than 40 years. This is made possible by fundamental design variations that offer reliable protection against stresses encountered in everyday life.

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High-end products that are built with the newest materials may have better performance warranty. SunPower provides a warranty that includes the installation if your equipment is set up by them. Hire qualified contractors to install solar panels to avoid severe issues.

How Long Will Usual Solar Panels Last?

You will eventually save more money depending on how long your solar panels can produce electricity. The good news is that before degradation becomes apparent, the majority of residential rooftop solar panels should continue to function for 25 years.

Solar panels can still produce solar energy after that, albeit less effectively than when they were first installed. A solar panel rarely stops producing energy entirely, but over time, its deterioration rate may become so great that you should completely replace the panels.

Many manufacturers provide shorter guarantees for the equipment in addition to solar panel production warranties. This can assist in repairing damage brought on by unforeseen weather conditions, falling branches, etc. Inverters for solar energy typically last 10 to 15 years.

The Lifespan of Solar Panels Made by SunPower Is How Long?

When SunPower solar panel reaches 80% of its initial capacity, it has reached the end of its useful life. If it can initially produce 300 watts in the Sun, it will be considered to have reached its lifetime when it attains 300 watts, under the same Sun. However, a SunPower panel’s warranty period is 25 years.

Less than 0.25% of SunPower panels degrade annually, which results in 4.5% in 25 years. It would lose 9% over 50 years and 18% over 100 years. That means the silicon has a lifetime of more than 100 years.

Water leaks in the panel’s frame could cause the metal setting up inside to corrode. Additionally, over time, the glass may develop pits from dust, which will reduce the output of the panels. The panels may reach their maximum output earlier or experience other types of failure.

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Are SunPower Solar Warranties being Functional?

An average SunPower solar warranty lasts 20 to 25 years. After this time, the warranties are only 80% effective, and they differ among producers. The SunPower Complete Trust Warranty ensures that your panels won’t lose more than 8% of their original output of direct current over 25 years.

Probably sooner than the solar panels, a solar power system’s inverters need to be replaced. A grid-tied inverter has a ten-year warranty, which is longer. Off-grid inverters will have a lifespan of only five years.

If the solar power system includes a battery backup, subsequently the batteries will likely need to be replaced before the panels do, just like the inverter. Although the type of battery packs can have a significant impact on how long they last, battery warranties typically range from three to fifteen years.

How to Extend the Life of SunPower Solar Panels?

The best thing you can do for the solar energy system after installation is to have it regularly inspected by a contractor or a maintenance company. They check everything to make sure it’s secure and everything is staying in place.

Debris removal aids in maintaining the panels’ functionality. It’s crucial to landscape trees so they don’t interfere with your solar panels. Falling branches and leaves can damage the panels, and if a section of the array is shaded, it can lead to hot spots that will eventually reduce output.

Try Some Strategies to Extend the Life of Your Solar Panels!

You will want to make sure you get the most value out of your solar panel investment by making sure they will last as long as feasible. To ensure that solar panels will accomplish this, follow these tips:

  • Maintenance and cleaning: The ability of solar panels to absorb sunlight and subsequently function is inversely correlated with their cleanliness. Some solar panels should be cleaned every week, while others only need to be cleaned every two months.
  • Continual upkeep and servicing: The same are true for solar panels when something is well-maintained, it lasts longer. Solar panels are prone to deteriorate if they aren’t routinely cleaned.
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The position of your solar panels on your roof, how they are installed, and the racking system they are mounted on can also affect how quickly a panel degrades. So, it’s crucial to pay attention to the location of your solar panel installation and any possible risks nearby.

How Often Should You Replace Solar Panels?

A solar panel may eventually fail due to degradation and would not generate electricity in this situation. So, your equipment must have excellent warranty coverage. You can get new panels if a panel fails while your warranty is still in effect.

However, you’ll be responsible for paying for their replacement if a panel fails after your warranty has expired. Solar panels continue to work despite their yearly degradation. They would not generate enough electricity to power your house or save you money on energy.

A dedicated app from your provider may let you know when your panel needs maintenance. This might indicate panel damage or a problem with the system. Get in touch with your solar installer to test and possibly replace your panels.


Solar panel investments pay off in the long run though their output declines over time. Since deterioration is inevitable, owners can take precautions to increase the lifespan of solar panels through regular maintenance.

Manufacturers and product lines’ performance warranties will vary, but typically they guarantee 90% operation after 10 years and 80% after 25 years. Extreme weather and climatic conditions are outside of your control and can shorten the lifespan of solar panels.

An ongoing risk to your solar power system is called a degradation rate, which occurs when a solar panel’s power output has decreased. The annual decline in energy output from SunPower solar panels is 0.25%-0.5%. Your panels should continue to function at about 90% of their initial output after 20 years.

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