he photovoltaic (PV) industry has been explicitly recognized as one of the core pillars for achieving carbon neutrality goals. According to forecasts by the International Energy Agency (IEA), the share of solar PV in the global power generation mix is projected to surge to 37.1% by 2030, with installed capacity expected to nearly triple.
However, the rapid and unbridled growth of the solar sector has been accompanied by a frequent occurrence of safety incidents. In particular, structural inadequacies in wind resistance and flood control design have led to blown-off modules, collapsed mounting structures, and submerged equipment, severely compromising the operational safety and economic viability of solar power plants.
Frequent Incidents Breakdown
2025: A severe storm destroyed a 3.18 MW ground-mounted PV plant in Vereto, Italy, cutting power to local residents for several hours before utility personnel restored service via backup generation.
March 2026: Wheatfield, Indiana, USA, was hit by severe winds and tornadoes. The prominent Dunns Bridge mega PV project-housing nearly 2.4 million solar modules-sustained heavy damage.
May–June 2026: Rajasthan, a major solar-producing region in India, was struck by consecutive severe monsoon windstorms.
Mid-May 2026: Southern Ontario, Canada, was battered by violent wind and rainstorms.
The increasing frequency of extreme weather events driven by global climate change is reshaping the risk landscape of the solar industry. In recent years, China and other global regions have witnessed a significant rise in severe typhoons and torrential rainstorms. As carbon neutrality ambitions collide with a "new normal" of extreme weather, these tragedies serve as a stark wake-up call: the grand vision of green infrastructure must be anchored in a solid foundation that respects natural laws.
Existing international standards-such as IEC 62548 (Design requirements for photovoltaic arrays) and IEC 63092 (Photovoltaics in buildings)-provide baseline structural safety requirements for flood and wind resistance. However, in an era where "once-in-a-century" events occur almost annually, whether these standards possess sufficient disaster resilience has become an inescapable question for the entire industry.
I. Structural Provisions in Current PV Standards
The International Electrotechnical Commission (IEC) standard framework sets rigorous structural safety specifications for wind and flood protection in utility-scale and building-integrated PV plants:
IEC 62548 (PV Array Design Requirements): Mandates that wind load calculations align with international building load standards (such as ASCE 7 or Eurocode 1), utilizing a baseline wind speed corresponding to at least a 50-year return period. It stresses wind tunnel testing for tracking mounts to prevent destruction from aerodynamic instability and flutter. Regarding flood protection, critical electrical equipment must be elevated 0.3 to 0.5 meters above the 100-year flood level, and components located in low-lying zones must achieve an IP67/IP68 ingress protection rating.
IEC 63092 (BIPV / BAPV Standards): Focuses on Building-Integrated and Building-Attached Photovoltaics. It stipulates that structural evaluations for wind, snow, and seismic loads must comply with ISO 22111 and related codes. This ensures that PV components share the same design lifespan and engineering standards as the primary building structure, with strict verification of gust response factors and connection load capacities.
II. Rationality and Limitations of Current Standards
It must be acknowledged that when these standards were formulated, they were based on historical meteorological data, contemporary risk assessments, and economic-technological conditions available at the time. Scientifically vetted, they possess deep historical rationale and served as a solid foundation for the standardized and large-scale expansion of solar energy over the past decade.
However, with the dramatic acceleration of global climate change, "once-in-a-hundred-years" storms, typhoons, and extreme gales are becoming increasingly frequent. Many power plants engineered to withstand "25-year return period" wind loads suffered severe damage just a few years post-construction-facing wind speeds far exceeding design limits. This resulted in twisted mounting frames, detached modules, and total structural collapse. This wave of extreme-weather losses demonstrates an indisputable reality: we are facing a fundamentally new risk environment-a "climate new normal" that historical data models can no longer accurately predict.
Relying on designs tied to lower return periods is essentially a passive "reactive" risk management approach.
The underlying logic assumes that extreme disasters are low-probability events, accepting structural risk to minimize initial capital expenditure (CAPEX) with the intent to repair or claim insurance after an incident. While reasonable during periods of climate stability, this paradigm has turned into a high-stakes gamble. When this gamble fails, the consequences are catastrophic-extending beyond direct financial losses to prolonged generation outages, protracted insurance claims, and potential secondary hazards (such as falling modules or electrical fires) that endanger public safety. These damages are uncontrolled, unpredictable, and devastating.
III. The Imperative for Standard Upgrades
Normalizing the "Once-in-a-Century" Standard: Authoritative reports from organizations like the World Meteorological Organization (WMO) repeatedly highlight that global warming has accumulated substantial thermal energy in the atmosphere and oceans. Consequently, the frequency and intensity of extreme rainfall and super typhoons have surged. Events previously categorized as rare 100-year occurrences may now have their return periods compressed to 30 years, 20 years, or even less.
Aligning with 25+ Year Lifespans: Given that solar PV plants are typically designed for an operational lifespan of 25+ years, climate risks escalate significantly over their lifecycle. Adopting higher return-period standards for wind, snow, and flood loads is an indispensable measure to navigate climate uncertainty.
Transitioning to Active Defense: Elevating baseline design requirements and updating load calculation methodologies to incorporate climate change impacts marks a crucial shift toward "active defense" in modern risk management.
Reducing Structural Failure Probabilities: By enhancing structural redundancy, we can substantially reduce the probability of catastrophic structural failures. This not only protects physical power assets, but more importantly, safeguards human lives, public safety, and energy grid stability. For a long-term infrastructure asset with a 25-year service life, the value of this added certainty is immeasurable.
Implementing Differentiated Local Standards: Stringent, tailored regional standards should be enforced in high-risk locations (such as coastal belts, wind corridors, and flood-prone basins).
As we aggressively scale up clean energy, we must give equal weight to the impact of extreme weather on energy infrastructure. Strengthening disaster prevention and mitigation is essential for building a resilient energy defense line. Raising structural safety standards for PV is not over-engineering-it is being responsible for the future. We must transition from "minimum compliance" to "maximum resilience," leveraging technical upgrades, standardized enhancements, and intelligent management to construct a robust, reliable, and sustainable solar energy ecosystem that protects the global energy transition.
