Average Lifespan of a Solar System
Typical solar panels are designed to last between 25 to 30 years. Even though the panels are the most critical components of the system, the system is only as good as it’s weakest link. Batteries and inverters have a lot more moving parts than solar panels and are much more likely to fail first.
Lifespan of Solar System Components
1. Batteries
If your solar system includes battery storage, expect the it to be the first part of your system that breaks. It’s expected to last around 10 years. Since it also takes approximately 10 years to payback a battery through savings, we don’t think it’s the best investment. But if you want to buy one because it’s cool, we are fully in support of that. Advances in battery technology are continuously improving their durability and performance.
2. Inverters
Solar inverters typically last 10 to 15 years and are often the cause of a system breaking down. However in our experience as a finance company, this seems to be the component that we hear complaints about the most. Regular monitoring and timely replacement can prevent system downtime and maintain efficiency. Usually most issues are due to installation, rather than the equipment itself.
3. Panels
Most reputable manufacturers offer 25+ year warranties, assuring that the panels will produce a substantial portion of their original energy output throughout this period. Over time, solar panels experience a degradation rate of approximately 0.5% per year, meaning they retain about 90% of their efficiency after 20 years.
4. Mounting Systems
The mounting hardware, which secures the panels to your roof, generally lasts the entire lifespan of the solar panels. However, periodic inspections ensure that the mounts remain secure and free from corrosion or damage.
Factors Affecting How Long a Solar System Lasts
Several factors influence how long a solar system lasts, ensuring its efficiency and durability over the years:
1. Quality of Equipment
Investing in brands that are known for their superior quality and reliability. Picking the right brand can significantly extend the lifespan of your solar system. High-quality panels not only degrade more slowly but also perform better in adverse conditions.
2. Installation Standards
Proper installation is vital for the longevity of a solar system. Working with experienced and certified installers ensures that the panels are securely mounted and optimally angled, reducing the risk of physical damage and enhancing performance.
3. Climate and Environmental Conditions
The local climate plays a significant role in determining how long a solar system lasts. Regions with extreme temperatures, high humidity, or frequent storms can accelerate the degradation of solar panels. However, modern panels are engineered to withstand harsh conditions, especially when paired with quality installation.
4. Maintenance Practices
Regular maintenance, including cleaning the panels and inspecting for damage, can prolong the lifespan of your solar system. Keeping panels free from debris and ensuring that all components function correctly minimizes wear and tear.
Tips to Maximize How Long a Solar System Lasts
Ensuring your solar system reaches its full potential involves proactive measures:
1. Regular Cleaning
Dust, leaves, and other debris can block sunlight, reducing efficiency. Regularly cleaning your solar panels with water or a soft cloth ensures maximum energy absorption.
2. Routine Inspections
Periodic inspections by a professional can identify and address issues such as loose connections, shading, or physical damage, preventing minor problems from escalating.
3. Monitor Performance
Utilize monitoring systems to track your solar system’s performance. Early detection of efficiency drops allows for timely maintenance and repairs.
4. Protect Against Physical Damage
Ensure that your solar panels are shielded from potential physical hazards like falling branches or hail. Installing protective barriers or choosing durable panels can mitigate these risks.
When to Consider Replacing Your Solar Panels
Despite their longevity, once your inverter or battery breaks down it can be worth replacing your entire system. This is because the solar industry is rapidly changing. Solar systems from 10 years ago are much less efficient than solar systems today. We can’t tell the future but we assume that in 10 years time it may be worthwhile replacing your entire system. To make matters worse, as technology updates, old equipment may not be compatible with new equipment. If one part of your system breaks down, you can consider replacing that one component, but it may also be worth while investigating a brand new system.
Conclusion
Understanding how long a solar system lasts is essential for maximising your investment and ensuring sustained energy savings. With a typical lifespan of 25 to 30 years for solar panels and up to 15 years for inverters, maintaining quality components and adhering to proper maintenance practices can significantly extend your system’s effectiveness. By choosing high-quality equipment, ensuring professional installation, and performing regular upkeep, you can enjoy the benefits of solar energy for decades to come.
