The impacts of climate change are becoming increasingly evident: hailstones are growing larger, hurricanes are intensifying, heatwaves are lasting longer, and wildfires are spreading more rapidly. According to a recent study by the University of Mannheim and the European Central Bank (ECB), in the summer of 2025 a quarter of all EU regions experienced extreme weather events, including heatwaves, droughts and rain-induced flooding. In total, 96 regions were affected by heatwaves, 195 by drought and 53 by floods. Each category of extreme weather event affects economic activity in different ways. However, these figures are likely to understate the scale of the challenge. The study did not consider the combined impact of simultaneous events, nor did it include hazards such as wildfires, which reached record levels across Europe this year, or storm-related hail and wind damage.
Solar roof systems – ensuring safety under increasing loads
Rooftop PV systems, typically exposed and elevated, face particular challenges under these conditions. A single severe storm can cause significant damage, leading to downtime, unexpected repair costs and reduced return on investment. Selecting robust modules that offer enhanced protection against extreme weather, including hail, storms and heavy snow loads, is becoming increasingly important. This applies to both ground-mounted systems and commercial and residential rooftop PV installations.
Why rooftop PV systems are especially exposed
Rooftop systems are particularly vulnerable to wind uplift, debris impact and roof-integrated risks such as water ingress during thunderstorms. Insurance coverage may also fall short and may not fully cover indirect costs such as lost energy production. For commercial and industrial (C&I) rooftop installations, businesses often rely on PV to meet sustainability targets and reduce operating costs. Damage from strong winds, hail or wildfires can disrupt business continuity, increase energy costs and undermine corporate sustainability commitments.
Protecting solar plants in extreme weather
For homeowners and commercial users, a rooftop PV system represents not only a financial investment but also a step towards greater energy independence. Damage from extreme weather can lead to costly replacements and a temporary return to grid electricity, eroding savings and reducing energy security.
Financial risks of unprotected systems
Rooftop PV systems without adequate protection face a high risk of financial loss during extreme weather events. Beyond the direct costs of repair or replacement, additional indirect costs arise, including lost savings from reduced energy production, higher insurance premiums following damage claims and, for businesses, increased operating expenses due to production disruptions or even damage to brand reputation, particularly for companies with defined sustainability targets. Investing in protective measures is significantly less costly than dealing with the consequences of severe weather damage.
Choosing the right solutions for rooftop PV systems
Manufacturers offer a range of advanced technologies and solutions to improve the resilience of rooftop PV systems:
• Impact-resistant panels, designed with stronger glass and frames to withstand hail and flying debris
• Wind-resistant mounting systems, with specialised racking to reduce uplift forces during storms and high winds
• Fire-resistant designs, using non-combustible materials and appropriate spacing to mitigate wildfire risk
• Protective coatings and films, improving durability against UV-related degradation
• Increased glass thickness, with the latest generation of dual-glass modules enhancing hail resistance and reducing mechanical stress
Regulatory standards support buyer confidence
Governments and industry bodies have introduced stricter standards, including IEC 61730 and IEC 61215, which assess hail impact, wind resistance and fire safety. Buyers should prioritise certified equipment to ensure long-term reliability. For businesses, compliance with these standards also demonstrates a commitment to environmental responsibility and effective risk management.
Fires in PV systems: Risk assessment and safety solutions
Hail resistance is becoming a key priority for installers and developers. Modules such as the Vertex S+ Shield are specifically engineered to withstand hail of up to 40 mm in diameter, according to VKF test conditions, under the Swiss HW4 hail certification, and offer a high level of fire safety with an A+A classification under IEC 61730. While the HW4 hail test is not yet mandatory, it is widely expected to become a regulatory or insurance requirement in the coming years. By selecting equipment with forward-looking certifications, buyers can stay ahead of evolving regulatory requirements.
Rooftop PV as a critical asset
For both homeowners and businesses, rooftop solar is an effective means of reducing costs and advancing sustainability goals. However, without adequate protection, these systems remain vulnerable to hail, storms, wildfires and other extreme weather events. By investing in robust system design, advanced protective technologies and certified components, buyers can safeguard their investment, minimise downtime and ensure long-term energy reliability. As extreme weather events become more frequent, resilient rooftop PV systems are no longer just a prudent choice but a necessity for a secure and sustainable energy future. (Klaus Hofmeister/hcn)
