The recent spate of fires linked to solar panels has sparked safety concerns and raised questions about the reliability of this renewable energy technology. While solar panels are hailed as a clean and sustainable power source, the incidents have prompted a closer examination of their potential risks, particularly in large-scale installations like hospitals and schools. This article delves into the issue, exploring the reasons behind these fires, the implications for building safety, and the steps being taken to mitigate the risks.
The Rising Number of Solar Panel Fires
One of the most striking aspects of this story is the increasing number of fire incidents involving solar panels. According to government statistics, the number of fire incidents in England where solar panels were mentioned in the records doubled from 39 in 2020 to 81 in 2024. This trend is particularly concerning given the widespread adoption of solar panels in various settings, from residential rooftops to large-scale commercial and institutional buildings. What makes this trend even more alarming is the potential for solar panels to trap heat, increasing temperatures and potentially accelerating fire spread, as noted in a government report examining the risks of fires involving photovoltaic (PV) panels.
The 'Fit and Forget' Problem
Dan Wilkins, from insurance company AXA UK, points out a critical issue with many solar panel systems: they are often installed as a 'fit and forget' solution. This approach, while convenient, can lead to neglect in maintenance and servicing. Solar panels require regular maintenance to ensure they function safely and efficiently. Neglecting this aspect can result in a buildup of debris, animal infestations, or weather-related damage, all of which can compromise the panels' integrity and potentially lead to fires. This is particularly problematic in large-scale installations where the consequences of a fire can be catastrophic.
The Electrical Risk to Firefighters
Another critical aspect of solar panel fires is the electrical risk they pose to firefighters. Unlike traditional fires, solar panels continue to generate power even when they are on fire. This means that firefighters must be cautious not to touch the panels or get too close, as they can still carry a significant electrical charge. Wilkins recalls a conversation with a firefighter who highlighted the importance of understanding the compatibility between the PV panel and the wiring system. Incompatible panels can become loose, leading to arcing and the potential for fires. This issue is particularly prevalent when cheaper, non-manufacturer-approved cables are used, underscoring the need for proper accreditation and maintenance practices.
The Need for Accreditation and Maintenance
The current lack of an accreditation scheme for large-scale PV systems is a significant concern. While the Microgeneration Certification Scheme (MCS) covers systems below 50KW, typically found in homes and small businesses, there is no mandatory scheme for larger installations. Wilkins advocates for an accreditation body specifically for these larger systems, emphasizing the importance of training, experience, and adherence to appropriate standards. This would ensure that solar panel installations are carried out by competent organizations, reducing the risk of fires and other safety incidents.
Mitigating Fire Spread and Roof Penetration
The government report recommended several measures to mitigate the risks associated with solar panel fires. These include leaving gaps between arrays of PV panels and ensuring that roof surfaces are not made of combustible materials. By implementing these measures, the report suggests that the spread of fire and roof penetration can be minimized, providing a crucial layer of protection for buildings and their occupants. Additionally, further research is needed to develop a comprehensive approach to fire safety in solar panel installations.
The Way Forward
As the world embraces renewable energy, it is essential to strike a balance between innovation and safety. The recent spate of solar panel fires serves as a stark reminder of the need for proper maintenance, accreditation, and safety measures. By addressing the 'fit and forget' problem, ensuring electrical compatibility, and implementing mitigation strategies, the solar energy industry can enhance the safety of its installations. The ongoing collaboration between industry partners, such as MCS, and regulatory bodies is crucial in making PV systems as safe as possible. Ultimately, the goal should be to reduce the number of fire-related incidents to as close to zero as possible, ensuring that the benefits of solar energy are realized without compromising safety.
In conclusion, while solar panels offer a promising path towards a sustainable future, the recent fires have underscored the importance of vigilance and proactive safety measures. By learning from these incidents and implementing the recommended changes, the solar energy industry can continue to thrive while ensuring the safety of its installations and the people who depend on them.
