Solar panels are a brilliant way to generate clean energy, slash electricity bills, and boost your home’s value. But like any electrical system, there are safety considerations. The good news? Panel fires are uncommon: in 2019, there were only 63 incidents reported. Solar adoption has skyrocketed during the last five years, but there are still less than 70 panel fires per month. This situation is entirely preventable with the right knowledge and maintenance.
Check this article to learn about the potential fire risks of solar panel systems, Chicago fire safety regulations, and proven practices to keep your solar system operating smoothly and safely. With this knowledge, you can confidently enjoy the peace of mind of a reliable solar energy system.
While panels are a fantastic source of clean energy, it’s important to be aware of potential safety hazards. Three main reasons for solar fire are:
There are dozens of solar panels fire standards. Today, we will review just those regulations of fire risk relevant to Chicago citizens.
| Standard | Governing Body | Description |
| NFPA 70 (NEC) – Article 690 | National Fire Protection Association (NFPA) | The NEC focuses on proper wiring, component selection, and safe system shutdown procedures for firefighters |
| IFC – Section 605.11 | International Code Council (ICC) | These are international solar safety rules for photovoltaic power systems adopted by Illinois |
| IBC – Section 1511.1 | International Code Council (ICC) | These are international provisions for rooftop solar panels, enforced in Chicago, with local amendments |
| Chicago Building Code – 14F-12-1204 Solar photovoltaic power systems | City of Chicago | Local building code provisions |
| Illinois State Fire Marshal Regulations | Office of the Illinois State Fire Marshal | While not directly addressing PV systems, it’s crucial for solar installers since it provides fire safety rules for permanently moored crafts |
| Chicago Electrical Code | City of Chicago | Look for the latest available code related to your building to ensure proper installation of electrical systems |
While solar panels are generally safe, certain situations can set solar panels on fire. Let’s examine them in detail.
Manufacturing defects in electrical components can provoke malfunctions and generate excessive heat. It leads to situations where solar panels catch fire.
Cutting corners during installation leads to loose connections, damaged wires, or improper grounding. These issues can increase the risk of solar panels fire hazard.
If a panel is partially shaded, it creates an uneven flow of electricity. In the long run, this leads to “arc faults”— tiny, high-intensity sparks within the panel. Over time, they damage the system and potentially ignite surrounding materials.
To partially mitigate this issue and lower solar panel fire risk, use arc fault circuit interrupters (AFCIs) and regularly inspect your system.
If panels are mounted too close to the roof, it restricts airflow, hindering heat dissipation. In the long run, this can lead to panel fires.
A build-up of dust and dirt reduces trapped heat. It can create hot spots within the panel, exceeding safe operating temperatures and increasing solar panel fire risk.
To start off-grid living, install batteries to store excessive electricity. While offering additional convenience, they introduce the risk of fire due to a thermal runaway phenomenon.
Thermal runaway is a vicious cycle that occurs within a lithium-ion battery. Here’s the breakdown of this solar battery fire case:
Solar panel fires can cause physical damage to panels, including melting, cracking, or destruction. Inverters and wiring are also crucial for converting DC from the panels to AC for your appliances.
You should monitor the system’s health. If it’s constantly hot, the battery will drain faster than expected. This overheating can trigger thermal runaway, causing fires on solar panels.
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Proper maintenance of the system mitigates potential PV fires. First, ensure that you collaborate only with certified installers, lowering the chances that your solar panels cause a fire hazard.
Clean your solar panels once in 3-4 months to remove dirt that can trap heat and create hot spots. Trim nearby trees to prevent shading, lowering the risk of fire.
Monitor your system to identify any abnormalities early. Schedule regular inspections by a qualified professional. Consider installing a rapid shutdown system that can quickly disconnect the DC electrical output of the solar system in case a solar panel fires.
Proper maintenance is needed to lower the risk of solar panels fire. Be aware of potential safety hazards and follow safety guidelines set by manufacturers and local authorities.
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