On the Evening of July 29,

multiple areas in Chengdu were hit by severe convective weather.

Dense hailstones pounded the city

accompanied by thunder and lightning, with some hailstones exceeding 30mm in diameter—

roughly the size of quail eggs

—roofs, balconies, cars, pedestrians: None were spared.

This "greeting from the sky" arrived with sudden ferocity, akin to nature abruptly pressing a "stress test button"—a surprise examination for photovoltaic power stations. Although the weather event was brief in duration, its intensity was considerable, disrupting daily commutes for many residents to varying degrees.

From Occasional to Routine

Hail is Escalating Globally

In recent years, hailstorms have increasingly become a common meteorological hazard across the globe. Regions such as Europe, North America, and Australia have witnessed hailstones exceeding 40mm in diameter, with some areas even reporting hailstones larger than 50mm. The rising frequency and intensity of hail pose a tangible challenge to the structural integrity of rooftops and photovoltaic systems.

As power generation equipment permanently exposed to the elements, solar modules bear the brunt of hail’s mechanical impact. Hail can easily cause glass shattering, microcracks in cells, or solder joint failures—issues that not only reduce the efficiency of individual modules but also compromise the stability of entire strings. Against the backdrop of current climate trends, hail has become an unavoidable variable in photovoltaic system design. A module’s ability to withstand sudden, high-impact events like hailstorms is critical—not only for the investment returns over the system’s lifecycle but also for the safety of both the PV system and the rooftop itself.

Real-World Testing Proves It

Hail Resistance Isn't Just Talk

Tongwei’s TNC modules have successfully passed rigorous testing by authoritative institutions, simulating extreme hail impacts with 45mm hailstones. The test used ice spheres measuring 45mm in diameter and weighing 43.9 grams, launched at a speed of 30.8 m/s—equivalent to a golf ball-sized hailstone traveling the length of a soccer field in just three seconds before striking the module.

The test involved sequential impacts on 11 key points across the module’s surface to verify glass strength, cell integrity, and overall power generation performance—all conducted in strict compliance with international standards.

Test results confirmed：

· No glass breakage

· No significant power degradation

· No abnormal deformation in encapsulation

These results fully validate the reliability of Tongwei’s TNC modules under extreme weather conditions.

TNC 2.0: From Cells to Glass

Every Layer Is Built to Endure

As Tongwei's latest high-efficiency module, the TNC 2.0 achieves comprehensive upgrades at both material and structural levels. With "reliability" as the core standard in material selection, structural design, and production processes, it delivers exceptional impact resistance.

First, at the material level, the TNC 2.0 employs 2.0mm heat-strengthened glass on both front and back sides, offering higher structural rigidity and strength for enhanced durability. This serves as the first "line of defense," effectively withstanding concentrated external impacts.

On the technical front, the module integrates the 908 cell technology (Tongwei’s self-developed 0BB technology), replacing traditional welded metal pads with organic silicon conductive adhesive. Combined with a specialized low-temperature soldering process, this eliminates stress concentration issues. Furthermore, by reducing ribbon diameter while increasing ribbon count, mechanical stresses from wind/snow loads are distributed across more contact points, reducing individual ribbon stress and lowering the risk of microcracks caused by impacts by 30%.

Defensive capabilities against extreme weather form the foundation for long-term system stability. Beyond reliability, the TNC 2.0 also delivers superior returns for customers. Take the G12R-66HD model of TNC 2.0 as an example: compared to traditional 620W modules, a 100MW ground-mounted power plant in Amsterdam is projected to generate an additional 39.663 million kWh over 30 years. This isn’t just a stronger "line of defense"—it’s also a significant "value add."

Tongwei remains committed to high-standard reliability design, developing product solutions with greater stability, durability, and adaptability to help global users build long-term, secure green energy systems. While we can’t change the weather, we can choose how to face it. Tongwei modules are born to harness light—standing resilient against global extreme weather to safeguard every ray of sunlight for users worldwide.