Defying winter: BISOL® Modules Engineered for Extreme Snow Loads

When winter covers rooftops and solar farms in a thick layer of snow, not all PV modules can handle the pressure. Snow accumulation can exert several thousand Pascals of force on photovoltaic panels. Without proper engineering, that pressure can bend frames, crack glass, or damage solar cells.

That’s where BISOL, Europe’s largest PV manufacturer, sets itself apart.

Engineered for Heavy Snow Loads 

BISOL modules are tested to remain mechanically stable under substantial loads, ensuring structural safety and long-term performance even after prolonged snow coverage. Certified snow-load tolerance is available in three levels, offering tailored protection for different project requirements:

• BISOL BDO – up to 6,000 Pa 

• BISOL BBO – up to 7,000 Pa 

• BISOL BSO – up to 11,000 Pa 

These values are validated by mechanical load testing that replicates the uniform weight of accumulated snow across the module’s surface. Structural integrity must be maintained without deformation or the formation of solar cell fractures. 

Why Snow Load Ratings Matter 

In regions of Italy such as the Alps and central Apennines, snow coverage can last for weeks or even months. Choosing modules with inadequate snow-load resistance exposes systems to long-term degradation, reduced efficiency, and structural risk. Snow weight is not just an environmental factor. It is an operational concern. 

High snow-load resistance ensures improved long-term durability, fewer microcracks, stable energy output, and continued compliance with regional building standards. 

Modules that fail structurally, even if partially, can suffer permanent loss of power output and may compromise safty or invalidate warranties. Choosing BISOL means choosing protection when winter is at its most severe.

European Manufacturing for Structural Confidence 

BISOL modules are manufactured in Europe, under complete in-house control from cell stringing to final inspection. This vertical integration guarantees high structural consistency, full traceability, and long-term mechanical strength. 

The company’s design philosophy prioritizes structural resilience and certified reliability under real operating conditions. That includes heavy snow, high winds, and rapid temperature shifts. Performance is not assumed. It is tested, measured, and certified. 

Beyond Snow Resistance 

BISOL modules are engineered for environments where weather is unpredictable and failure is not acceptable. In addition to snow-load durability, they offer: 

• Hail resistance certified up to 40 millimeters 

• Wind load endurance up to 2,400 Pascals 

• Proven reliability through decades of real-world operation 

From alpine rooftops to industrial flat roofs, BISOL modules have delivered reliable performance in more than 120 countries, including installations in Arctic and Antarctic environments. 

Every BISOL module is designed not only to perform, but to endure. While most manufacturers rely solely on standard IEC testing, BISOL goes further by developing production and validation processes that reflect real-life stress factors and the most demanding climates.

A Smarter Choice for Demanding Projects 

BISOL modules are not for those focused only on the lowest price per watt. They are engineered for clients who value long-term energy certainty and performance under extreme conditions.

• Commercial and industrial rooftops where reliability is critical 

• Government and architectural projects requiring certified European origin 

• Private homes in snow-prone areas where performance and aesthetics both matter 

Whether your system faces occasional snowfall or months of frozen buildup, BISOL ensures that every component is built for it. Snow is not a challenge to avoid. It is a condition to be engineered for. 

Choose photovoltaic modules engineered not only to perform, but to endure. 

Choose certified European production. 

Choose BISOL.