Quality

Thanks to our experience, we are able to fully guarantee the quality of our products.
The execution of numerous projects has consolidated the trust that our clients place in us.

 

Certified Quality

- The GRAMMER SOLAR air collector has been applied in numerous research projects both in Germany and the rest of Europe.

- The GRAMMER SOLAR company has developed the TWINSOLAR SKL collector in collaboration with the Fraunhofer Institute for Solar Energy Systems - ISE.

- More than 30 years of experience in the production of solar air collectors.

- Collector parts are of high quality for a long useful life (min. 25 years).

30 years of experience in the production of solar air collectors. They are certified, according to the guidelines of the quality label for Solar Energy Collectors RAL-GZ-966-S1.

RAL-Quality label solar (certificate)

RAL-GZ-966-S1-G013 (quality label)

Qualities

• Stabel and long-lasting casing (for TWIN-/TOPSOLAR: aluminium frame, seewater resistant!)
• 4 mm weatherproof single-layer security glass
• Integratet air filter to prevent collector pollution
• Long-living aluminium gill absorber
• High quality polycrystalline TWINSOLAR modules
• Maximum efficiency in fresh air operation > 80%
• Nominal power approx. 700 watt / m²
• Durability at least 25 years
• Solar air collectors are funded by the state - please check the general regulations for funding for your country