In the rapidly expanding solar energy sector, performance, reliability, and long-term asset protection are non-negotiable. As solar installations scale worldwide, so does the responsibility to maintain them using solutions that are not only effective, but also fully aligned with manufacturers’ technical requirements.

This is where letters of conformity from solar panel manufacturers become a decisive factor—and a clear differentiator.

What Are Letters of Compliance and Why Do They Matter?

Letters of conformity are formal documents issued by solar panel manufacturers confirming that specific cleaning and maintenance products can be safely used on their modules. These letters validate that the products have been reviewed and approved according to the manufacturers’ material, coating, and warranty requirements.

For asset owners, EPCs, cleaning and maintenance teams, O&M providers, and investors, these letters provide critical assurance:

• Cleaning products will not damage panels or coatings
• Manufacturer warranties remain protected
• Cleaning processes align with best-practice standards
• Long-term system performance is preserved

In a sector where improper cleaning can lead to irreversible damage and warranty loss, manufacturer approval is not a luxury—it is a necessity.

Creating Value Across the Entire Solar Value Chain

The impact of these letters of compliance goes far beyond product validation—they create tangible value for every stakeholder in the solar ecosystem. For Chemitek, they represent a powerful differentiator and a clear proof point of technical excellence and industry leadership. For professional cleaning and O&M companies, they provide something just as valuable: credibility and confidence. Being able to demonstrate that the products used are officially approved by leading module manufacturers offers reassurance—or “comfort”—to asset owners and investors, who are increasingly sensitive to warranty protection and long-term performance risks. In practice, this means cleaning companies can stand out in a competitive market by showing they take a higher standard of care, using solutions that are not only effective but also manufacturer-approved. Ultimately, this alignment of trust benefits everyone involved: manufacturers see their technology protected, service providers strengthen their professional positioning, and asset owners gain peace of mind that their solar plants are being maintained according to best practice.

Unmatched Industry Recognition

We are proud to be the only company in the world whose solar cleaning product range is backed by such an extensive portfolio of manufacturer approvals.

Our letters of conformity come from the world’s largest and most influential solar panel manufacturers, including:

• Longi
• Trina Solar
• JA Solar
• Jinko Solar
• and many others

This level of recognition is unprecedented in the industry and reflects years of technical collaboration, testing, and commitment to excellence.

Compliance Across the Entire Solar Cleaning Range

Our letters of conformity are organized by product category, ensuring transparency and traceability for every application:

• 18 letters for SWP and ASA – Longi, Jinko, Trina, JA Solar, Aiko, Astronergy, Canadian Solar, First Solar, EVVO, GCL, ReneSolar, Ureco, CSun, ZnshineSolar, Seraphim, Risen, Runergy, Suntech
• 9 letters for CRA – Longi, Canadian Solar, Trina, Jinko Solar, JA Solar, Risen, Runergy, Suntech, Astronergy
• 4 letters for LRA – Runergy, Longi, First Solar, JA Solar
• 3 letters for DSD – Trina Solar, Longi, JA Solar
• 3 letters for MRA, PRA, WSA, and DSA – Runergy, Longi, JA Solar

This breadth of approvals demonstrates that our solutions are not limited to a single use case or panel type—they are trusted across multiple technologies, manufacturers, and cleaning scenarios.

Raising the Bar for the Entire Solar Industry

As the solar sector continues to mature, expectations around professionalism, compliance, and risk management are rising. Manufacturer-approved cleaning solutions are becoming a benchmark for responsible solar asset care.

By securing this unmatched portfolio of letters of conformity, we are not only protecting assets and optimizing cleaning and maintenance operations, we are helping to set a new global standard for solar panel cleaning.

In an industry built on trust, performance, and long-term value, these approvals speak louder than words. They confirm what our customers already know: our products are engineered for excellence, endorsed by manufacturers, and designed to protect solar energy investments.