Solar panels have unquestionably made it possible for many Australians to benefit from both lower energy costs and cleaner energy. All across the country, solar energy is considered a great investment. But many who are still not sure ask the question, “how long do solar panels last?”. The answer may surprise you.
In most cases, a solar energy system will pay for itself within 3 to 7 years. The initial costs may be high, but thanks to government and state rebates the installation price is more affordable for most Australian households.
However, we are still talking about a big financial investment. And for most people, it is important to ensure that the system will last for many years ahead. If you had to replace the expensive system parts every other year, it would not be very beneficial for your economy.
So, how long do solar panels last?
How long do solar panels last in Australia?
In most cases, solar panels installed on the rooftop of Australian homes will last for 25 years. You can expect your solar panel system to last for 20 to 30 years. This means that you won’t have to worry about replacing the components for a long time.
Of course, the lifespan of the solar panel system will depend on both quality and installation. It is a good idea to invest in a high-quality solar energy system. Make sure that a reputable and Clean Energy Council (CEC) approved installer takes care of the installation.
You will not be eligible for any solar panel rebate schemes if the solar panel system (and installer) is not CEC listed.
Solar panel systems degrade slowly
Even though you can expect your solar panel system to last for 25 years or so, it is also worth noting that the solar system will degrade around 0.5 to 2 % every year. In other words, the system might not produce as much energy as it used to, as time passes.
Besides the quality of your solar panel system and the installation process, several other factors may impact how long your system will last.
UV induced damage
Ultraviolet radiation from the sun might degrade the panels as the years go by. Luckily, manufacturers of high-quality panels include sun blockers that will help the solar system to tolerate UV radiation.
In Australia, the sunlight can be harsh on solar panels. It is important to find panels that will withstand the sunny climate.
Maintenance will determine how long solar panels last
In the same way that you should maintain your car, house and other investments. It is important to maintain your solar energy system regularly. Well, at least if you want it to last for as long as possible.
Remember, your installer might offer service agreements for the solar panel system you install. This might be a good idea to invest in. It will ensure that your system (panels, inverter and battery) is maintained properly.
Moisture
Humidity can lead to the gradual deterioration of your solar energy system. This is because the efficiency of the panels will be impacted. Most parts of Australia do not have a very humid climate. Nowadays, most quality manufacturers are producing panels that can handle moisture.
However, in areas like Queensland and the Northern Territory residents should be aware of humidity damage on solar panels. Make sure that you invest in a solar panel system that is right for your climate zone.
Wind
If you are living in a particularly wind-exposed area, you should be aware that solar panels might weaken or bend in case of a heavy gale. However, most panels can withstand some wind, and might even work more efficiently.
In other words, wind should not be a big concern.
Temperature fluctuations are a factor in determining how long solar panels last
Another factor that might affect how long your solar panel will last, is thermal cycling and temperature fluctuations. As the temperature changes from hot to cold (and vice versa), your solar panels will contract and expand.
Because of this, it is important to invest in solar panels of high quality. These are usually made of materials that will withstand temperature fluctuations better.
When do I need to replace the solar panels?
Most will usually last for 20 to 30 years. That means you probably will not have to replace them for a long while yet. If you were to notice a significant efficiency drop it might be time to replace the panels. Keep an eye out for visible degradation as well.
According to the experts, you should consider changing the panels when their efficiency is 80% of what it originally was.
Install solar panels that will last
High-quality panels installed by an approved installer mean you can expect them to last for many years. Are you considering going solar?
Choose an installer that will give you useful advice. They will help you find a solar panel system that is perfect for your climate!