How Long do Commercial Solar Panels Last?

How long do commercial solar panels last? On average, commercial solar panels have a lifespan of 25 to 30 years, making them a reliable, long-term investment for businesses aiming to cut energy costs and reduce their carbon footprint. 

For organisations, the benefits of solar panels extend far beyond cost savings. Solar energy offers sustainability, energy independence, and a chance to align with eco-conscious values that resonate with clients and stakeholders. It’s an investment in both profitability and reputation.

Ready to see how much your business could save? Use MakeMyHouseGreen’s solar panel calculator for a tailored estimate.

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Life Expectancy of Commercial Solar Panels

Commercial solar panels are designed to last between 25 and 30 years, providing businesses with decades of energy savings and reliable performance. During this time, panels typically experience minimal degradation, with efficiency decreasing by around 0.5% to 1% annually. This means that even after 25 years, most solar panels will still operate at approximately 80% of their original capacity.

Even beyond the 30-year mark, solar panels don’t stop working. Instead, they continue to generate electricity at reduced efficiency. While their energy output may no longer meet peak performance levels, they can still contribute to your energy needs, making them a valuable asset. For businesses seeking maximum efficiency, upgrading to newer technology may eventually be a practical choice.

Advancements in solar technology have further enhanced the durability and lifespan of modern panels, making them more resistant to environmental factors like extreme temperatures and UV exposure. However, proper maintenance remains essential to maximise their lifespan and maintain consistent energy production over the years.

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What Happens to Panels After Use?

When solar panels reach the end of their useful life, they can be responsibly recycled. Many components, including glass, aluminum frames, and certain metals, are recyclable, reducing environmental impact. By working with certified recycling programmes, businesses can ensure that older panels are disposed of or repurposed sustainably, reinforcing their commitment to environmental responsibility.

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Factors Which Minimise Life Expectancy

While commercial solar panels are built to last, certain factors can reduce their lifespan and efficiency if not addressed. Understanding these risks helps businesses take preventive measures to ensure their solar panels remain productive for decades.

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1. Environmental Conditions

Extreme weather events, such as hailstorms, high winds, and heavy snow, can physically damage panels or their mounting systems. Prolonged exposure to harsh UV rays or fluctuating temperatures can also contribute to wear and tear over time. Locations prone to dust storms or high levels of pollution may experience faster dirt accumulation, which can block sunlight and reduce efficiency.

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2. Poor Installation Practices

Incorrectly installed panels or mounting systems can lead to structural issues, such as loose panels, inadequate weight distribution, or water ingress. Improper installation may also compromise electrical connections, increasing the risk of system failures and reduced efficiency. 

That’s why MakeMyHouseGreen works exclusively with experienced installers who deliver top-quality installations, ensuring every solar panel system is securely and optimally fitted to protect against these risks.

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3. Lack of Maintenance

Neglecting regular cleaning and inspections can lead to dirt buildup, shading from debris, or unnoticed physical damage. Without maintenance, issues like micro-cracks, corrosion, or faulty inverters may go undetected, causing a gradual decline in performance and lifespan.

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4. Shading and Debris

Obstructions like overgrown trees, bird droppings, or debris from storms can block sunlight, significantly reducing energy production. Over time, shading can cause hot spots on panels, leading to overheating and potential damage.

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5. Quality of Components

Using lower-quality panels, inverters, or mounting systems increases the likelihood of premature failure. High-quality components are more durable and resistant to environmental stresses, ensuring better performance and a longer lifespan.

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6. Degradation Rates

All solar panels experience degradation over time, but the rate varies depending on the panel type and manufacturing quality. Lower-quality panels tend to degrade faster, reducing their efficiency and overall lifespan.

At MakeMyHouseGreen, we ensure that best practices are followed at every step to minimise degradation rates. From choosing the ideal position for panels to using durable, high-quality equipment, every detail is optimised to maximise the lifespan of your solar system. 

Curious about the savings and benefits for your business? Use our solar panel calculator to get a tailored estimate today.

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How to Make Commercial Solar Panels Last Longer

Maximising the lifespan and efficiency of commercial solar panels requires proper care and proactive measures. By following these best practices, businesses can ensure their solar systems deliver optimal performance for decades.

‍1. Regular Maintenance: Routine inspections and cleaning are essential to keeping solar panels in top condition. Remove dirt, dust, and debris that can accumulate on the surface and block sunlight. Regular maintenance also helps identify and address small issues before they become costly problems.

‍2. Professional Servicing: Schedule annual check-ups with certified solar technicians to ensure all components, including panels, inverters, and electrical connections, are functioning correctly. Professional servicing can extend the lifespan of your system by preventing wear and tear from going unnoticed.

‍3. Prevent Shading and Debris: Keep panels free from shading caused by growing trees, overhanging branches, or nearby structures. Trim vegetation regularly, and clear away bird droppings or storm debris to maintain consistent energy production and prevent damage.

‍4. Invest in High-Quality Equipment: Choose durable panels, inverters, and mounting systems with strong warranties. High-quality components are designed to withstand environmental factors and minimise degradation over time, ensuring long-term reliability.

‍5. Monitor Energy Output: Use monitoring systems to track your solar panels’ energy production. A sudden drop in output can indicate issues like shading, dirt buildup, or system faults. Early detection allows for prompt action to resolve any problems.

‍6. Protect Against Extreme Weather: In regions prone to hail, strong winds, or heavy snow, consider adding protective features like hail guards or reinforced mounting systems. These measures safeguard your solar panels from physical damage caused by harsh weather conditions.

‍7. Follow Manufacturer Guidelines: Adhering to the manufacturer’s maintenance recommendations ensures your system operates within optimal conditions. This practice is essential for maintaining warranties and avoiding unnecessary repairs.

At MakeMyHouseGreen, we work with businesses to implement tailored maintenance plans, ensuring their solar panels last as long as possible.

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Signs Your Panels Need Replacing

While your commercial solar panels will last for decades, there will come a time when they need replacing. Here's what to look for:

‍1. Significant Drop in Energy Output: If your solar panels are producing significantly less energy than expected, despite optimal weather conditions, it’s a strong indication that they are no longer functioning efficiently. Regular monitoring of energy output can help identify this issue early.

‍2. Visible Physical Damage: Cracks, discoloration, or broken glass are clear signs that your panels may need replacing. These issues can reduce the amount of sunlight absorbed and lead to further inefficiencies or safety concerns.

‍3. Hot Spots: Hot spots occur when certain areas of a solar panel overheat due to dirt buildup, shading, or internal faults. These can permanently damage the panel’s cells and significantly reduce its performance.

‍4. Aging Inverter or Connections: Frequent inverter errors or wiring issues could point to an aging system. While inverters generally have a shorter lifespan than panels, their failure may also indicate the need for a full system upgrade.

‍5. Panels Out of Warranty: If your panels are out of warranty and repairs are becoming more frequent and costly, replacing them may be more economical than continuing with piecemeal fixes.

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Why Your Business Should Go Solar

Investing in solar energy is a smart, forward-thinking decision for businesses. Here are the key reasons why your business should consider going solar:

• Significant Cost Savings: Solar panels can drastically reduce your energy bills by generating electricity directly from sunlight. Over time, the savings on electricity costs often outweigh the initial installation expenses, providing a strong return on investment.
• Achieving Sustainability Goals: Adopting solar energy demonstrates your business’s commitment to sustainability and reducing its carbon footprint. This move not only helps the environment but also aligns with corporate social responsibility goals.
• Energy Independence: By installing solar panels, your business can reduce its reliance on the grid and protect itself from fluctuating energy prices. Solar energy provides a stable and predictable power source, offering long-term energy security.
• Financial Incentives: There are numerous government incentives and grants available for businesses that adopt renewable energy solutions like solar. These financial benefits can help offset installation costs and make solar energy an even more attractive investment.
• Enhanced Brand Reputation: Going solar positions your business as an eco-conscious and innovative organisation. This can enhance your reputation with clients, partners, and investors, especially those who value sustainability and environmental responsibility.
• Future-Proofing Against Rising Energy Costs: With energy prices continually rising, generating your own renewable energy shields your business from increasing operational costs, making it more competitive in the long term.

For more insights, explore our guide on The Benefits of Solar Panels for a Business to understand how solar energy can transform your organisation.

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Common Myths About Commercial Solar Panels

Despite the growing adoption of solar energy, several myths still surround the use of solar panels. Here, we debunk some of the most common misconceptions to help businesses make informed decisions.

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1. Solar Panels Are Too Expensive

While the upfront cost of installing solar panels may seem high, advancements in technology have significantly reduced prices over the years. Financial incentives, grants, and the long-term savings on energy bills make solar panels a cost-effective investment for businesses. In many cases, the system pays for itself within a few years.

‍Recommended Article: How Much Do Solar Panels Cost for Businesses?

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2. Solar Panels Require Too Much Maintenance

Solar panels are surprisingly low-maintenance. Routine cleaning, periodic inspections, and monitoring energy output are typically all that’s required to keep them running efficiently. Many systems even come with warranties that cover potential issues, further reducing concerns about upkeep.

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3. Solar Panels Don’t Work in Cloudy Weather

This is a common misconception. Solar panels are designed to capture both direct and diffuse sunlight, meaning they can still generate electricity on cloudy or overcast days. While energy production may be slightly lower, they remain effective year-round, even in regions with less sunshine.

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4. Panels Degrade Too Quickly

Modern solar panels are built to last, with most commercial systems maintaining at least 80% of their efficiency after 25 years. Proper maintenance and high-quality installation ensure that your panels provide consistent energy production for decades.

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5. Solar Energy Isn’t Reliable

With advances in solar technology and energy storage solutions, solar systems are more reliable than ever. Adding a battery system can store excess energy for use during cloudy periods or at night, ensuring a steady power supply for your business.

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Final Thoughts

Commercial solar panels offer more than just a way to reduce energy costs - they represent a forward-thinking investment in sustainability, operational efficiency, and brand reputation. With proper care and maintenance, these systems can deliver decades of consistent energy production, helping businesses meet their goals while reducing their environmental impact.

If you’re ready to explore how solar panels could transform your operations, MakeMyHouseGreen provides the tools and expertise to guide you every step of the way. Take the first step by calculating your business’s potential savings with our solar panel calculator.