How Long Do Solar Panels Last?

Homeowners considering going solar often have a lot of questions, from how much solar panels cost to how solar panels perform in bad weather. At Blue Raven Solar, our priority is to address these questions and more. For example, today, we’ll tackle a common concern: how long do solar panels last. 

Investing in solar is a big decision. Fortunately, most modern solar panels are built to last 25 years or more. While the exact lifespans of solar systems evolve and vary, most come with warranties spanning 10-25 years. Solar panel performance may vary over time, but it remains a reliable, long-term renewable energy solution.

Will Solar Panels Maintain Their Energy Production Throughout Their Lifetime?

Like any product, gadget, or source of energy production, solar panel arrays will slowly become less efficient at producing electricity, no matter the solar panel installer. This reduction in production, known as solar panel degradation, which occurs when tiny cracks build up within the solar cells, causing electrical connections to deteriorate. These “microcracks” can be caused by things like humidity entering the solar panel, solar cells freezing, flexing from heavy winds, or UV damage.

Left out in the elements, due to roof installation, all solar power systems are prone to normal wear and tear. However, with proper installation and simple maintenance routines, most solar panels can avoid major degradation and failure. Beginning with installation, secure mounting mechanisms are essential to withstand environmental factors like strong winds and storms, preventing damage and ensuring long-term stability. Adequate wiring during installation not only ensures the safe operation of the system but also minimizes the risk of electrical issues that could compromise performance. 

Monitoring the system’s performance over time is another critical aspect of maintenance. Through regular checks and data analysis, any deviations from expected performance can be detected early, allowing for timely intervention to address potential issues before they escalate. Visual inspections enable the identification of visible signs of wear and tear, such as physical damage or corrosion, while professional inspections provide a deeper assessment of the system’s components and overall health. This proactive approach allows for the detection and resolution of issues before they lead to major degradation or failure. Preventive maintenance measures, such as tightening electrical connections and ensuring proper functioning of inverters, can also be implemented to further mitigate the risk of performance issues and prolong the lifespan of the system. 

The National Renewable Energy Laboratory found most solar panels have degradation rates of around 0.3-0.8% per year, depending on solar panel quality.  

Over a 25-year lifespan, a solar panel is expected to have an energy production rate that starts at 100% of its expected output and drops incrementally to about 80% of its original efficiency by the end of the lifespan. After 25-years, you can still count on your custom, rooftop solar panel system for a significant power output.

Solar Panels with the Longest Lifespans

Monocrystalline solar panels are generally considered to have the longest lifespan, lasting between 25-30 years, on average. They degrade slower than other types of rooftop panels, meaning they will maintain a higher efficiency for a longer period. 

Here’s a quick comparison of expected lifespan for different solar panel types: 

• Monocrystalline: 25-30 years
• Polycrystalline: 25 years
• Thin film: Up to 20 years

It’s important to note, these are averages, and the actual lifespan of your solar panels can be affected by a variety of factors. However, choosing monocrystalline panels is a good starting point if you’re looking for a long-lasting solar solution.

Solar Panel Warranties

Solar panel warranties typically consist of two main components: performance warranties and product warranties.  

Performance warranties guarantee the solar panels will produce at a certain level of electricity over a specified period. This guarantee ensures the panels maintain efficiency levels by the end of the warranty period. If the solar panels fall short of this benchmark, the manufacturer is obligated to either replace or compensate the owner for the underperformance. 

Product warranties, on the other hand, cover defects in materials and workmanship, ensuring the panels are free from manufacturing defects that could affect their functionality and performance. Overall, robust warranties provide consumers with peace of mind and assurance of the longevity and reliability of their solar panel investment. 

Some warranties are transferable to a new owner if you sell your home or business. This can be a valuable selling point, as it provides assurance to potential buyers that the solar panel system is covered by a comprehensive warranty. It is important to check with your solar installer to see if that is something available to you. It is also essential to review the warranty carefully to understand any exclusions or limitations. Common exclusions may include damage caused by improper installation, acts of nature, or neglect. Understanding these exclusions can help you take appropriate steps to protect your investment. 

Knowing how to file a warranty claim and what documentation is required is crucial in case you need to utilize the warranty. Manufacturers or installers typically outline the process for filing a claim in the warranty documentation. 

At Blue Raven Solar, we offer several different warranties and guarantees that allow customers to feel secure in their solar system. These include a two-year service warranty, a ten-year workmanship warranty, an equipment warranty, and a product guarantee.

What Can I Do to Increase the Life and Efficiency of My Solar Panels?

All homeowners can extend the lifetime and efficiency of their solar panel systems by evaluating the following:

1. Reputable Sources – Homeowners can also select a reputable installer and high-quality equipment to increase the efficiency of their solar panels. An installer should be chosen through thorough research, considering factors such as credentials, certifications, customer reviews, and past installations. Equally important is investing in high-quality solar panels and associated equipment from reputable brands known for durability, performance, and warranty coverage. Although it may involve a higher upfront cost, this investment pays off in the long run through improved energy generation and reduced maintenance expenses.
2. Monitor Solar Panel Output – Check the solar panels’ output each month through the Enphase or SunPower app. Monthly solar panel output will give you insights into how well your panels are operating. If any serious reduction in output occurs, please report it to your solar panel installers. Being aware of the energy production of your solar panels is one of the easiest ways to detect potential problems.
3. Rinse Panels with Water – Generally, with a quick wash, any dust, dirt, or pollen will be removed from your solar panels resulting in higher efficiency. Clean solar panels will absorb more light and produce more electricity. If you keep your panels clean, it’s far less likely the buildup will harm the solar system or prevent optimum production.
4. Remove Snow and Ice Carefully – Snow and ice can block valuable light from getting to your solar panels; however, it can also be dangerous to remove. It is important to buy and use proper tools to remove any snow or ice to avoid scratching or damaging your rooftop system. Homeowners can also wait for the sun to melt the snow off their panels and roof, which is safe and often the best option. Snow and ice melt off solar panels faster because they generate heat.
5. Visually Inspect the Hardware – Most photovoltaic (PV) systems come with a 25-year manufacture warranty. It is a smart idea to routinely check your panels. Some problems to look for when inspecting your system include rusted mounting bolts, solar panel defects, frayed wiring, and more. If there seems to be any issues pr problems with your panels or system, notify your solar panel installer and have a professional inspect them.

With a few routine checks and simple bi-annual cleaning, your solar panels will continue to perform at their highest capacity, cutting the cost of your electric bills and saving you money. See how much you can save today by using our estimate savings calculator, where you can receive an accurate, zero-commitment savings report.

Blue Raven Solar Installation Process and Guarantees

Unlocking the freedom of electricity independence begins with the switch to solar energy, empowering you to take charge of your own energy destiny. Discover the potential savings waiting for you with estimate savings – a powerful tool showcasing the potential financial benefits of embracing solar power. 

Blue Raven Solar is here to guide you every step of the way. Our process starts with a comprehensive site survey tailored to your unique circumstances. From evaluating your property’s specifics to understanding your lifestyle and budget constraints, we craft a solar power system that’s as individual as you are. By optimizing factors like solar panel placement, we ensure your system operates at peak efficiency, regardless of weather conditions or roof orientation. 

Choose to go solar with us and take control of your energy future, enjoying immediate savings but also the assurance of a lasting investment that continues to power your life for years to come.

Product, Workmanship, and Satisfaction Warranties

At Blue Raven Solar, all our solar panels include warranties and guarantees. We do everything in our power to ensure your solar panels perform well. Here are the warranties we include with each installation:

• Two Year Service Warranty: If you have any system issues or problems within the first two years of your system being installed, we will service your system and handle any manufacturer warranty claims for free! Just contact our team and we will investigate the best way to help.
• 25-Year Product Warranty: We install new solar panels, microinverters, and other specialized equipment with high standards. We guarantee the equipment will carry industry-leading manufacturer warranties—most lasting a minimum of 25 years. In the event of a manufacturer defect within the first two years, we will handle the repair or replacement claim ourselves. After two years, we will assist you with manufacturer’s claims, should they arise, but the customer will be responsible for the cost of processing the claim with the manufacturer.
• 10-Year Workmanship Warranty: We guarantee our work for ten years, which includes the design and installation of your solar panel system, roof penetrations, and the error-free operation of your system.
• Total Customer Satisfaction: For solar panel systems underperforming compared to the expected rates, we cover the costs to get the system performing as it should.

Frequently Asked Questions

Sources:

• https://www.sunrun.com/go-solar-center/solar-articles/how-long-do-solar-panels-really-last
• https://energyinformative.org/lifespan-solar-panels/