The module that deliveres 100 %. For 25 years.

In today’s solar market, long-term value matters more than ever. Installers, investors, and developers no longer choose based on wattage alone. They demand reliability, transparency, and performance that holds for decades.

BISOL®, Europe’s largest photovoltaic module manufacturer, meets that demand with real data, upgraded guarantees, and solar products engineered not just to perform but to endure.

BISOL Supreme™ is now officially ENEA-Listed for Transition 5.0

The flagship BISOL Supreme™ module has been officially added to the ENEA Register of Photovoltaic Technologies, confirming full eligibility for Italy’s Transition 5.0 tax incentives. The register, created by Italian law, recognises modules that meet the highest standards for technical performance, traceability, and European production.

BISOL Supreme™ is the only module in the world with a written guarantee of 100 percent power output for 25 years.

There is no degradation. No performance decline. Just s table, predictable energy yield year after year.

And it delivers even more.

Independent testing confirms that BISOL Supreme™ produces 11 percent more electricity over its lifetime compared to other modules of the same nominal power. This is not a bonus. It is a design objective. This result is achieved through better materials, zero PID and LID, and a complete absence of output degradation.

Each module carries a unique QR code linking to its digital identity card. This gives installers and owners access to I/V curves, EL test images, material traceability, and factory data. In an industry where specifications are often vague or unverifiable, this level of transparency is a clear competitive advantage.

NEW 30/25-YEAR GUARANTEE IS NOW STANDARD ON BISOL PREMIUM MODULES

Alongside the success of Supreme, BISOL has introduced a new standard guarantee for all Premium series modules.

• 30-year linear power output guarantee, down to 90 percent

• 25-year product guarantee

• Based on real-world performance: only 0.01% degradation measured after 20 years

• Automatically applied to BDO, BBO, and BSO series modules

These are the strongest standard guarantees in the global solar industry. They are backed not by projections but by two decades of field-proven data.

Build to withstand more. And proven to do so.

Every BISOL module is designed not only to perform but to endure. While most manufacturers follow standard IEC tests, BISOL goes further. Production and testing are designed for real-world conditions and extreme environments.

• Hail resistance certified to HW4: up to Ø 40 mm at 99.1 km/h

• Snow loads up to 11,000 Pa (BSO series)

• Wind loads up to 2,400 Pa

• Damp heat testing beyond 7,000 hours

• Thermal cycling at extreme temperatures from –45 °C to +85 °C

• All verified and backed by complete traceability

BISOL also uses glass-backsheet laminates to enhance mechanical protection and prevent microcracks. This ensures consistent performance even under severe environmental stress, especially hail.

All BISOL modules are manufactured in Slovenia under full in-house control. Every part of every module is traceable from silicon to soldering and is produced in compliance with EU labour and environmental standards.

This is not just about ethics or branding. It is the foundation for consistent quality control, long-term guarantee support, and partner confidence.

Cashback and eligibility are more than just energy

BISOL Supreme™ qualifies for full Transition 5.0 eligibility. Italian clients gain access to tax credits, enhanced depreciation, and financial support for high-efficiency photovoltaic systems.

It is the only module in Europe that combines short-term cashback, long-term tax incentives, and zero power loss. All in a single product.

Combined with its performance and guarantee, this delivers both immediate financial return and long-term energy yield.

Designed for those who expect more

BISOL modules are not for those chasing the lowest cost per watt. They are for clients who expect long-term performance, integrity, and verifiable quality.

Whether for:

• Commercial rooftops with strict performance targets

• Architectural projects requiring traceability and European origin

• Homeowners expecting elegant design with zero degradation

  
  

BISOL modules offer a clear competitive advantage.

A smarter investment in every sence.

Solar is no longer just about modules on a roof. It is a long-term decision about energy, cost, trust, and accountability.

BISOL Supreme™ and the upgraded BISOL Premium modules are more than high-quality products. They are engineered to endure. They are proven in the field. They are supported by a manufacturer with twenty years of operational history and one of the lowest complaint rates in the industry.

In a market full of claims, BISOL offers what others cannot.

Proof.