Press release

November 24, 2020

DSM Advanced Solar launches new ‘all purpose’ Endurance backsheet

Royal DSM, a global science-based company in Nutrition, Health and Sustainable Living, today announced the launch of the ‘all purpose’ Endurance backsheet D15: a product that fills a gap in the solar market by delivering superior protection for a wide range of solar modules at an ideal performance-cost ratio. As a leader in co-extruded backsheet technology DSM is now poised to help further revolutionize the backsheet industry - with a clear goal of attaining a leading position. 

New Endurans HP D15 backsheet

For more information contact:

Endurans™ Solar
Annet Hoek
Manager Global Marketing Communications
Tel: +31 6 53708168

DSM introduced the Endurance backsheet D15 to help the industry follow the cost-down roadmap of lowering the LCOE of solar energy – but without the need to sacrifice on quality and performance. Built on the same successful co-extrusion technology platform as DSM’s existing B series with their unique polyolefin strong core, this new addition to the Endurance backsheet portfolio delivers excellent protection and durability performance. Thus, DSM expects this grade to truly accelerate the introduction of co-extrusion technology in the market.

The Endurance backsheet D15 is an all-purpose backsheet for mainstream applications that is already proven to perform. Not only is it based on technology that has delivered in the field for almost six years without a fault; it recently became the recipient of the world’s first integrated stress sequence accelerated aging certificate, from industry leading third-party testing and certification organization, TÜV SÜD.

This tough material evaluation simulates natural conditions through a combination of damp heat aging, ultraviolet aging, high-and-low temperature cycle aging, and other sequences – and has been introduced in the midst of unprecedented backsheet failure in the industry. Some 16% of all module failures are related to the backsheet component, according to the latest Global PV Reliability Report from DuPont. This adds up to an estimated $4.5 bn module investment at stake in 2020.

“Increasingly we are seeing – and hearing from customers – that traditional backsheet design has reached its limits and is no longer fit for purpose in the longer term,” says Pascal de Sain, Vice President of DSM Advanced Solar. “Extreme cost pressure has led to thinner backsheets, made from inferior PET-based materials with less and less fluoropolymer content. But our new Endurance backsheet D15 addresses this challenge by delivering outstanding module protection, based on industry leading technology – affordably.”

The Endurance backsheet D15 is co-extruded in a single-step process with no adhesives needed. The result is a strong multi-material product that also features the strongest core layer on the market – made from polyolefin instead of PET. This in turn enables the D15 backsheet to deliver excellent moisture protection and sand abrasion resistance coupled with outstanding mechanical, UV and chemical resistance.

In addition to benefitting performance, the Endurance backsheet D15 also benefits the planet. The product is produced via a completely transparent manufacturing process with full traceability of Bill of Materials. Furthermore, it delivers the same sustainability benefits as the rest of the Endurance backsheet family. Endurance backsheet D15 is completely fluorine free with up to a 30% lower carbon footprint than traditional equivalents – and is fully recyclable with no production waste. This in turn enables DSM to continue addressing several of its key UN Sustainable Development Goals (SGDs): SDG7 (‘Ensuring access to affordable, clean energy for all’); SDG12 (‘Ensuring responsible consumption and production’); and SDG13 (‘Taking urgent action to combat climate change’).

“This latest addition to our Endurance backsheet family is proof of our continued commitment to the global solar industry,” said Pascal de Sain. “Here at DSM Advanced Solar we remain more dedicated than ever to achieving our ambition of helping to make clean and affordable solar energy available for all.”

DSM* - Bright Science. Brighter Living.™

Royal DSM is a purpose-led global science-based company in Nutrition, Health and Sustainable Living. DSM is driving economic prosperity, environmental progress and social advances to create sustainable value for all stakeholders. DSM delivers innovative business solutions for human nutrition, animal nutrition, personal care and aroma, medical devices, green products and applications, and new mobility and connectivity. DSM and its associated companies deliver annual net sales of about €10 billion with approximately 23,000 employees. The company is listed on Euronext Amsterdam. More information can be found at

* DSM sold its backsheet business to Worthen Industries June 2021. This business is now active in the market under the tradename Endurans™ Solar. This press release has been copied from DSM especially for Endurans Solar website archive. 

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