Blog Updated: December 2025
When you’re making a major investment, it’s normal to wonder how long that investment will last and how well it will stand the test of time. Since solar is an investment in your energy future, it’s normal to ask, “How long do solar panels last?” It’s a fair question and thinking in the long-term and working to understand how long solar panels last is a smart move. People are pleasantly surprised to hear that solar panels have a long lifespan and minimal maintenance costs.
Key Takeaways for How Long Solar Panels Last & Solar Panel Maintenance
- We recommend checking your system’s monitoring app at least twice a month to ensure that everything is functioning properly.
- Solar panels can last 30+ years. And performance degradation over that time is minimal, with the National Renewable Energy Laboratory estimating 0.5% degradation each year. Namaste Solar includes panel degradation in our quotes and modeling.
- Solar panels are built to withstand extreme temperatures, high humidity conditions, strong wind forces, heavy loads that simulate snow or ice pack, and 1 inch hail traveling 51 miles an hour.
- Most solar panel manufacturers currently offer a 25-year warranty with the expectation that they will continue to operate for years to come after that warranty expires.
- Most solar panel manufacturers currently offer a 25-year warranty with the expectation that they will continue to operate for years to come after that warranty expires.
- Solar panel systems are typically very low maintenance. The only certain maintenance cost is the inverter replacement after roughly 15 years. Namaste Solar includes this cost in your initial quote to avoid surprises down the line.
How Long Do Solar Panels Last?
Even though they are out in the open and exposed to the elements, solar panels are designed to be very durable and resilient. There is plenty of evidence already to show that solar panels can last 30 years and beyond. The industry has been around long enough that some of the earlier solar panel systems are testing the limits of their lifespan.
One of the oldest systems in the world operated in Italy from 1982 to 2017 with minimal interruption or need for maintenance. In 2020, one homeowner tested his solar panel from 1980 and found that, after being on his roof for 40 years the panel had only decreased its output by 8%.
After 20 years in business, Namaste Solar has systems that have been up and running for many years, including the Colorado Convention Center solar system that has been operating since 2008.
Those are some of the earliest solar panels that were produced. Technology and design have vastly improved since the 1980’s and so have the chances that your modern solar panels will last for decades.
Today, most solar panel manufacturers offer a 25-year warranty on their panels. This is one more measure of confidence in the solar panel’s lifespan, but it’s expected that panels will continue to operate for years to come after that warranty expires.
Hopefully this gives you more confidence that solar panels are a worth it (for many reasons) and that your solar panels will convert sunlight into energy for your home and family for decades to come.
How Durable Are Solar Panels?
The solar cells inside a solar panel, the parts that are responsible for creating electricity from sunlight, are very fragile. That’s why there are multiple protective layers over the solar cells, including the top layer of high-impact glass. These protective layers are all put to the test to meet international standards, but many companies test their panels to go above and beyond for added durability. It is this durability, in part, that ensures your solar panels will last decades.
During testing, solar panels are exposed to extreme temperatures (both hot and cold), high humidity conditions, strong wind forces, and heavy loads that simulate snow or ice pack. They are also blasted with simulated hail; the international standards require that solar panels can withstand 25mm (1 inch) diameter hailstones traveling at 23 meters per second (51 miles per hour).
What Solar Panel Maintenance is Required to Ensure my Solar Panels Last Long? How Much Does that Cost?
Once installed, solar panels are typically very low maintenance, lasting for decades with minimal effort from you. This is largely because there are no moving parts in the system. The only maintenance cost that is certain is the inverter, which is typically replaced after the system has been operating for roughly 15 years. We don’t want you to experience any surprises, so Namaste Solar includes this cost in the initial quote when showing your long-term savings potential and payback year.
Often, if problems arise with your system, a simple system reset will do the trick. Take a look at our residential service page and FAQ section for instructions on how to reset your inverter, plus read other tips and tricks for understanding your system.
We suggest that you check your system’s monitoring app at least twice a month to ensure that everything is functioning properly. Setting a calendar reminder is an easy way to fold this into your routine. Many installs have a monitoring system, but you also have the added option of checking your system’s inverter. Every inverter is different, but in general what you want to see is a solid green light.
Our other suggestion is to get system inspections every 3-5 years to make sure all the components are functioning properly. This is an optional check-up for your system that provides peace of mind that everything is operating at maximum capacity.
Does Solar Panel Productivity Change Over Time?
Solar panels do degrade over time, meaning that year after year they do lose some ability to produce energy from sunlight, but this doesn’t have a large effect on how long your solar panels will last. The National Renewable Energy Laboratory estimates that on average production from a solar panel will decrease by about 0.5% each year. Namaste Solar includes panel degradation in our quotes and modeling to give you an accurate idea of what to expect from your solar panel system over time.
So, What Happens at the End of a Solar Panel’s Life?
Solar panel recycling has always been a major question in the solar industry, but because solar panels last so long, it was largely a question that the industry put off for later. We have committed to finding ways to responsibly recycle solar panels, and local options are now available to do so. Read more about solar panel recycling here in Colorado and how Namaste Solar recycles our panels.
Your Solar System is Resilient and Will Last Decades
Considering solar panels sit on top of your roof and are exposed to the elements, they had to be created with resiliency in mind, which is why your solar panels will last 30+ years. Your solar system is a low maintenance, cost saving feature that will be a part of your home for years and years to come.
Get started with your free, no-pressure quote today. Give us a call at 303-536-8920 or click the button below.
