Do Typhoons Affect Rooftop Solar Panels? How to Reinforce Them?
TyphoonSays·防御问答 · Prepared Defense · 更新 at 2026-07-16
The strong winds and heavy rain brought by typhoons indeed pose a severe test for rooftop solar panels. If installed improperly or lacking maintenance over time, photovoltaic (PV) modules may face risks such as being lifted off, bracket deformation, or even falling. This not only causes property damage but also endangers the safety of pedestrians below. Therefore, understanding potential risks and taking scientific reinforcement measures is crucial.
Potential Threats of Typhoons to PV Systems
According to the national standard for tropical cyclone grades issued by the China Meteorological Administration (CMA), when wind speeds reach certain levels (such as typhoon intensity or above), their destructive power cannot be underestimated. For rooftop PV systems, the main threats come from two aspects: first, wind load, where strong winds generate upward lift beneath the panels; if not securely fixed, this can easily lead to overall detachment; second, wind-induced vibration, where long-term or intense shaking may cause screws to loosen and metal fatigue fractures in the brackets. Additionally, if drainage is poor during the heavy rains accompanying a typhoon, water accumulation may damage inverters or junction boxes, leading to risks of leakage and short circuits. It should be noted that regulations regarding school and work suspensions during typhoons, as well as warning response standards, may vary by location. Please refer to local government announcements. However, proactively inspecting facilities before a red warning is issued is a wise move.
Scientific Reinforcement and Daily Maintenance Recommendations
To enhance the wind resistance of PV systems, it is recommended to focus on the following key points for inspection and reinforcement:
- Check Fasteners: Focus on checking whether clamps and bolts are loose or corroded. It is recommended to use a torque wrench to retighten all connection points according to the torque values specified by the manufacturer, especially for modules at the edges, as they withstand the highest wind pressure.
- Reinforce Bracket Structure: Confirm that the connection between the bracket base and the roof is secure. For color steel tile roofs, check whether the clamps are tightly engaged; for concrete roofs, ensure that expansion bolts or chemical anchors show no signs of loosening. If slight deformation of the brackets is found, contact professionals immediately for replacement or additional support.
- Clear Surrounding Hazards: Remove branches and debris around and behind the PV panels to prevent strong winds from blowing these objects into the panels. At the same time, ensure that roof drains are unobstructed to avoid water accumulation adding extra load or eroding the waterproof layer.
Emergency Strategies During Extreme Weather
Before a typhoon arrives, in addition to physical reinforcement, electrical safety protection should also be prepared. It is recommended to cut off the AC output switch of the PV system and, if necessary, disconnect the DC side connectors to prevent fires caused by lightning strikes or water immersion. If the typhoon's wind speed is expected to exceed the design wind resistance level of the PV system (typically, residential systems are designed based on the maximum wind pressure with a 50-year return period for the local area), and you are in the core impact zone of the typhoon, the safest approach is to contact a professional operation and maintenance team for assessment. Do not attempt to climb onto the roof yourself. Before restoring power after the disaster, be sure to have professionals comprehensively test insulation performance and grounding conditions. Only reconnect to the grid after confirming everything is correct.
Real-time typhoon tracks can be queried at TyphoonSays (taifengshuo.com)
This article is typhoonsay's original copy content, and the local policy standards are based on the local government's latest release.