Rooftop solar panels have gained immense popularity as a clean and renewable energy source. They offer numerous benefits, including reduced electricity bills and a lower carbon footprint. However, recent concerns have emerged about the safety of rooftop solar systems, with claims that solar-related fires are on the rise. In this article, we will explore whether rooftop solar fires are indeed spiking and provide valuable insights into how homeowners can ensure the safety of their solar installations. You can also get your FREE solar quotes here at Energy Matters.
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Are rooftop solar fires on the rise?
Claims of increasing rooftop solar fires have raised alarm bells, but it’s crucial to consider these concerns. Solar panels are not inherently dangerous, but like any electrical system, they require proper installation, maintenance, and monitoring to minimise risks.
Around 3,000 house fires occur in Victoria each year, according to the Country Fire Authority. And Victoria has a large number of solar-powered residences. At the end of 2022 according to Solar Victoria, there were approximately 510,000 Victorian households (and counting) with rooftop PV, which means that 0.01% of those households experienced a fire.
Compared to 2022, when just four DC isolator fires were reported in the Northern Territory, this year’s total represents a significant increase. This year, a DC isolator component of a solar PV system has caused fires at 11 different properties in the Northern Territory.
The increase has caused NT Worksafe, the territory’s workplace safety authority, to issue a safety alert warning and, between January and August, issue 22 infringement notices to solar PV installations.
Solar fire incidents in Australia
Solar panel fire in Niagara Park, NSW
On the morning of January 10, 2021, Fire and Rescue NSW responded to a report of solar panels alighting on the roof of a house in Crestwood Avenue, Niagara Park. On arrival, firefighters found a small amount of smoke from the roof. They investigated further and found that the smoke was coming from an isolation box on the roof for the solar panels.
The firefighters checked the rest of the roof and premises for any sign of fire extension but found none. They then disconnected the power to the solar panels and rendered them safe. The panels were also covered.
Fire and Rescue NSW Responds to Fire at Solar Panel Isolating Switch in North Wollongong, NSW
On April 4, 2022, Fire and Rescue NSW (FRNSW) responded to a fire at an industrial building in North Wollongong, Australia. The fire was caused by a solar panel isolating switch on the roof of the building. FRNSW crews could extinguish the fire quickly, and no one was injured.
The fire is a reminder that solar panel systems are electric systems, and can be a fire hazard. It is important to have proper safety measures in place. FRNSW recommends that all solar panel systems have an isolating switch that can disconnect the system from the power grid in case of a fire.
Superintendent Adam Dewberry from FRNSW also reminded the public to call Triple Zero (000) in a fire emergency. The Triple Zero service is the quickest way to get the right resources from emergency services to help you.
Beaumaris, Victoria solar panel fire
On September 29, 2023, at 11:30 AM, FRV firefighters were called to a fire at a double-story home in Hepburn Avenue, Beaumaris, Victoria. The fire had broken out in the back roof of the property and was quickly spreading.
Fortunately, all occupants were able to evacuate before the arrival of FRV crews safely. Firefighters quickly gained the upper hand on the blaze and controlled the situation by 12:11 PM.
It is believed that the fire may have been sparked by an electrical fault related to a solar panel. There were no injuries reported.
Solar PV System Fire in Humpty Doo, NT
On Saturday, September 14, 2019, a solar PV system caught fire on the roof of a commercial building in Humpty Doo, Northern Territory, Australia. The fire was extinguished before it spread to the rest of the building, but the solar PV system was destroyed.
An investigation by Electrical Safety Inspectors found that the fire’s ignition point was a DC solar isolator, which had suffered extensive electrical damage to the switch contacts. The likely cause of the fire was poor installation practices, which allowed moisture to enter the isolator and cause an electric arc.
The solar PV system was installed in January 2016, just over three years before the fire. This suggests that the installation practices were dangerous. The fact that the fire did not spread to the rest of the building is fortunate, but it is also a reminder of the importance of proper installation and maintenance of solar PV systems.
Source: ABC News, NT Worksafe, Fire Rescue Victoria, Fire+Rescue NSW, Country Fire Authority, Solar Victoria
Are DC isolators to blame for the increase in rooftop fires? What causes rooftop solar fires?
The most common cause of rooftop solar fires is faulty electrical components, such as DC isolators, inverters, and wiring. DC isolators disconnect the solar panels from the rest of the electrical system for maintenance or safety. Inverters convert the DC electricity generated by the solar panels into AC electricity that can be used in the home.
Other potential causes of rooftop solar fires include:
- Damage to solar panels: Solar panels can be damaged by hail, storms, or other events. If a solar panel is damaged, it can create a fire hazard.
- Poor installation: If a solar system is not installed properly, it can increase the fire risk. For example, if the wiring is not properly insulated or secured, it could cause a short circuit and fire.
- Lack of maintenance: Solar systems require regular maintenance to operate safely. If a solar system is not properly maintained, it can increase the fire risk.
How to keep your rooftop solar system safe
There are several things you can do to keep your rooftop solar system safe and reduce the risk of fire:
- Choose a reputable solar installer: Make sure to choose a solar installer who is licensed and insured. You should also check references and read online reviews before choosing an installer.
- Get regular maintenance: Have your solar system inspected and maintained by a qualified technician at least once a year.
- Keep an eye on your solar system: Inspect your solar system regularly for any signs of damage, such as cracked or broken solar panels, loose wiring, or burn marks.
- Install a rapid shutdown device: A rapid shutdown device can automatically disconnect your solar panels from the rest of the electrical system in case of a fire.
Additional tips for staying safe
- Be aware of the signs of a potential fire, such as smoke, sparks, or burning smells.
- Have a fire extinguisher and blanket in your home, and ensure everyone knows how to use them.
- Develop a fire escape plan and practice it regularly.
- Make sure that your home insurance policy covers rooftop solar fires.
- Keep your system clean and free of debris.
- Trim any trees or other objects that are shading your solar panels.
- Install a solar isolator switch to disconnect the system from the grid in the event of a fire.
What to do if you have a rooftop solar fire
If you have a rooftop solar fire, the most important thing to do is to call the fire department immediately (dial 000). Once the fire is out, have your solar system inspected by a qualified technician to determine the cause of the fire and make any necessary repairs.
Rooftop solar systems can be a safe and eco-friendly addition to your home when installed and maintained properly. While concerns about rooftop solar fires exist, it’s important to remember that most solar installations are safe and reliable. To keep your system out of the news and ensure the safety of your home, take proactive measures by working with reputable installers, investing in quality components, and conducting regular maintenance checks. By doing so, you can enjoy the benefits of solar energy while minimising risks.
So, are my solar panels at risk of a fire?
Your solar system is an electrical system that must be installed by a licenced installer. Professional installation should result in a safe and well-functioning system. If you have solar, and you’re concerned about the quality of the installation, we recommend contacting a reputable solar installer or a licenced electrician to inspect the system.
As with any electrical system, maintenance and monitoring are key to performance and safety.
Read more about solar panels
- Solar panel brief history and overview
- How a grid connected solar power system works
- Home Solar Systems The Complete Guide 2023
- Solar Panel Systems in Australia – Tips, Prices & Key Info
- Solar Panel Sizes, Dimensions And Wattage
- How to Make Your Solar Panels Last Longer in Australia
- How Long Do Solar Panels Last in Australia? Degradation Explained
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