How Long Do Solar Panels Last On A House?

How long do solar panels last on a house?

How long do solar panels last on a house? It is a cream question but we should know before solar panel installation in our homes, offices, industries, and other places. Solar panels are the best source of green and clean energy for our environment. The energy is renewable and way more cost-effective than the traditional energy-producing ways.

Now if you are just getting to know about solar panels and how energy is produced by them, you are bound to have questions. One of the most common questions that must be bothering you is how long solar panels last a house.

If you are looking for the answer to this question, you are at the right door. We have done our research and gathered all you need to know.

Solar panels last for 25 years in a house.

The most commonly asked question about solar panels is how long will solar panels last.

Solar panels are made to last for two to three decades. After a certain amount of time , solar panels degrade and energy production gets slower. However, the lifespan of photovoltaic solar panels has evidently gone up over the last two decades.

The average lifespan of solar panels is believed to be 25 years+.

Now that we understand how long solar panels last, have you ever thought about why solar panels lose their efficiency? The reasons are simple. Over time the solar panels wear out or get tears in them. let’s visit how to calculate solar panel efficiency.

So, bear with us to find the answer to this question.

What is the lifespan of a solar panel?

The lifespan of solar panels is mostly considered somewhere between 25-30 years.

If you believe that solar panels will be destroyed after this time, you are mistaken. However, the ability of solar panels to produce energy drops up to a certain percentage.

The industry standard life for solar panels would be at least 25 years or more. Under such circumstances, these old solar panels are broken down into different parts. Later on, these pieces are brought back together to produce new solar panels.

Anyhow, there comes a stage when the old solar panels are no longer recycled to produce new solar cells. Thus, they are disposed of. Therefore, the life expectancy of solar panels can be considered up to three decades from their installation.

Your existing solar panels will require recycling after they have successfully crossed their expected lifespan. Solar panels that have already passed 20 years of their life are most likely to give off 90% of their original energy output. 

According to experts, each year a solar panel loses around 0.5% of its original efficiency. In simple words, this means the solar panel loses its ability to produce energy by 0.5% every year.

One of the best parts about solar panels is that they are low maintenance. You do not have to clean them from time to time. However, it is not mandatory yet here are a few tips to ensure that your solar panels are working at their full efficiency.

Keeping the Solar Cells Free of Debris, Dirt, and Dust

It is in fact true that solar panels do not require to be taken care of. Anyhow, having a look at them from time to time could actually help you in ensuring that they are performing well.

Any contact with dirt, dust, and debris can affect the lifetime of solar panels.

Commonly, rain is considered enough in order to clean solar cells. At times it can be proven fruitful to get your solar panels checked and cleaned by a professional.

If any sort of damage is noticed during the inspection, it is recommended not to any actions in order to fix the issue. This may result in damaging the cells completely as you do not have the proper types of equipment and training.

Therefore, you are requested to contact your solar panel provider for further assistance.

Ensuring that the solar panels are monitored and maintained well

Although solar panels require almost no maintenance, routine maintenance would be harmless. The maintenance includes checking the solar panel’s performance, the inverters, and the meter. For additional checks, you could ensure that the electrical parts are also running with full efficiency.

In case you notice the solar panels are not performing well as they should, there could be an issue. Additionally, if the issue indicates an electrical problem, you are recommended to call someone professional to resolve the issue.

Hook on to a trustworthy solar panel provider

The best thing you can do for your solar panels is to be in touch with a solar panel expert or provider. This plays an immense role in the long run. Moreover, you will find solar panel providers who offer you maintenance packages along with installation.

They ensure that your solar panels are generating clean and reliable energy over the years.

How long do solar panel batteries last?

Solar panel batteries can last somewhere between 5 to 25 years.

The most prevalent types of batteries for solar panels are lithium-ion batteries. On average, these batteries come with a lifespan of 15 years or so. Anyhow, there are factors that will show some impact on the lifespan of the batteries that you are using.

How long do solar panels last on a house

How long the batteries last will also impact how long solar panels last.

The health of the battery can get affected by factors like the type of the battery, depth of discharge, storage, the cycle of the battery, and most importantly maintenance.

Let’s look into the factors a little closely!

Battery Type

There are different types of batteries are used to store solar panel power to use it in the off-sun period. however, let’s see some commonly and more popular solar panel battery types.

Lead Acid

Lead acid batteries are one of the oldest batteries that have been used in order to support solar panels. The only drawback about these batteries is that they tend to run out faster in comparison to other batteries.

Lead acid batteries will last up to just 1500-3,000 cycles. This means the batteries are ought to serve you for 3-5 years.

Lithium Ion Batteries

The game changer is here, lithium-ion batteries. Yes, the cycle lives might vary and so will their life span. However, the quality of these batteries is better than most other batteries used to produce solar energy.

Lithium-ion batteries usually last up to 6,000 or so cycles. All in all these types of batteries are made to provide you service for years.


The placement of your battery has an impact on its lifespan. A solar battery that is stored outside and exposed to the outdoors will degrade faster than a battery stored in a controlled environment.

It doesn’t mean your battery has to be stored indoors. Garages are a common storage location, other than that a protected outside space could also serve the purpose.

Solar batteries often have a wide operating temperature range. This means the climate of a certain area will also have an impact on the lifetime of the batteries.

In worst-case scenarios, very high or low temperatures will cause the batteries to malfunction.

Depth of Discharge

Each solar battery has a depth of discharge (DoD), which is the percentage of capacity that can be used without harming the battery’s health. Depending on the type of battery you use, the DoD will vary.

Modern batteries feature built-in protection mechanisms that restrict you from using the maximum capacity of any battery.

Battery Cycle Life

Solar batteries are accessible with a range of cycle lifetimes. The cycle life of a battery is the number of times it can complete a full charge and discharge cycle. The cycle life of a solar battery is one of the most crucial aspects in determining its lifespan.

Maintenance of Batteries

Solar batteries aren’t a particularly labour-intensive piece of machinery. Although they are made with the precision and dependability of modern technology, it is still required to keep an eye on your battery’s health in order to prevent problems.

Many batteries have health check apps associated with them. If your battery has a linked app, checking its performance from time to time is a smart option.

How long do solar panels last on average?

In common cases, we face how many years do solar panels last. The latest solar panels will last for two to three decades on average.

As the average service years are over, it is not like the solar panels are going to die or be destroyed. The power production rate and capability of solar panels go down by a small percentage.

As the average time is over for your solar panels, it would be a good decision to put them up for recycling. Recycling the panels will help them gain their previous efficiency. As a result, they will perform to their full potential.

Although solar cells are known for producing green energy till their end of time and require very less maintenance, taking a little bit of extra care will make them last longer.

a polycrystalline solar panel lifespan is usually not longer than three decades. However, they are highly useful in order to produce space cooling and heating, making electricity and water heating.

Do solar panels last forever?

No, solar panels do not last forever.

The basic reasons behind the solar panels not lasting forever or degradation are the weather and being exposed to the sun for a long duration.

Degradation of the solar cells affects multiple factors of the panels. From the rate of its power production to its lifetime, everything is hampered.

Here’s a list of reasons why solar panels degrade over time.

Degradation due to being induced to light all the time

The very first reason behind solar panel degradation is the panels being induced to light for a longer duration. Interaction in between the crystalline silicon cells on the panels and the environment makes the panels wear out. This is known as LID. LIDs can last for days or weeks.

Next comes the DLID, which means a panel being directly induced with sunlight. The good news is, it just lasts a few hours. Anyhow, it will degrade the quality of the panels and lose their efficiency.

Last but not least comes UVID, which means the degradation that happens as solar panels are exposed to UV light.

Degradation over age

This type of degradation is normal and most commonly observed in solar panels. Heavy rainfall, snowfall, and high temperature can also cause this type of degradation.

Under all these circumstances, the panels are bound to be affected by corrosion, cell contamination, and many more issues. This will result in damaging the water seal and due to which the solar panels will get exposed to moisture.

Over time, moisture will lead to growing debris and mould.

What is the life expectancy of a solar panel?

The life expectancy for solar panels or the useful life of solar panels is expected to be between 20 to 30 years.

In fact, research has shown that the solar panels that were installed during the 1980s are still working as expected. The lifespan of photovoltaic solar panels is three decades at maximum. This means you must install a new set of solar panels and recycle the old ones.

After the span of 20-25 years, the solar panels would still be performing. The power output will be significantly lower than the manufacturer or solar panel installer predicted.

The external factors that affect the health of solar panels are the basic reasons behind the solar panels having a limited life expectancy.

Do solar panels make your roof last longer?

For the most part of it, Yes! Solar panels can make your roof last longer.

But, here’s the catch, it depends on the installation and the material of your roof. When the solar panel installation is done right, they act as a stellar protectant.

These panels protect your roof from being in direct contact with harmful UV rays. Other than that, they also absorb the direct sunlight that can cause damage to your roof. Air passes between the panels and the roof as well, effectively the roof.

By installing solar panels, you may also shield your roof from severe weather like snow, ice, and hail. Which can usually lead to causing harm to the roofs. Your roof may last longer thanks to the protection provided by the solar panels.

The lifespan of residential solar panels may end after a certain number of years, however, they will surely increase the lifespan of your roof.

How long do solar panel inverters last?

Solar panel inverters will last somewhere between 10-12 years on average.

The life expectancy of the inverters is less compared to the life expectancy of home solar panels. Typically these inverters need to be replaced at least once while the solar panels are working. Power inverters of solar panels are mandatory if you wish your solar panels to perform well.

If you are successful in increasing the life expectancy of the inverter, it will help you save costs in running the panels.

Unfortunately, solar panel inverters are built with materials that tend to age faster. Moreover, the most common reason behind the wearing out is the weathering out of the capacitors that are installed in the inverter. They need regular maintenance if you want them to work to their full potential. Let’s see how to connect an inverter to the solar charge controller.

Which solar panels last the longest?

Both monocrystalline solar panels and polycrystalline silicon solar panels have a life expectancy of 25 years or so. These solar panels are considered the longest lasting solar panels.

Although this is the average for all solar panels, there are factors that more or less impact the longevity of the panels. Good maintenance of solar panels can make them last for over three decades.

According to experts, the average annual rate of degradation for solar panels is 0.5%. Whereas, this is the rate at which the average efficiency of solar panels degrades over a certain time.

This degradation will happen no matter what type of material was used to produce the panels. Other than that, the installation process can also affect the lifespan of your solar panels.


Solar energy is a long lasting or long lasting energy source. Solar energy is the biggest source of renewable energy. However, the lifespan of a solar panel is determined by the factors like the type of panel you select, the climate, the maintenance routine, and the brand you choose.

Extreme weather conditions, such as high temperatures, wind, and snow can all damage the elements of your solar panel. Dirt and debris on the panel surface should also be avoided as much as possible, as they cause the degradation process to get faster. But, the most effective approach to ensure that your solar panels endure a long time is to select a solar provider that has a robust warranty.

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