Wilhelm Stein

Sunfilm AG is one of the world's largest manufacturers of silicon-based thin-film modules with a combined capacity of 85 megawatts peak (MWp) at its two German production sites in Grossroehrsdorf and Bitterfeld-Wolfen. The company has an additional 60 MWp of capacity under construction as well. Thin-film is one of the fastest growing segments of the solar PV industry. Sunfilm's innovative technology for tandem junction thin-film silicon solar modules allows a larger part of the solar spectrum to be harvested as compared to amorphous silicon thin-film solar modules, leading to higher module efficiencies. Additionally, the amount of silicon needed to produce these modules is significantly less than for crystalline silicon modules.

Sunmaxx PVT GmbH is a German company that specializes in developing, producing, and selling innovative PVT systems that use sustainable energy sources. The company is based in Dresden, Germany, and the CEO of the company is Wilhelm Stein. The company's team consists of experts in the field of PVT technology, offering highly condensed know-how. Sunmaxx PVT's modules are designed to efficiently convert solar energy into electricity and heat.

OSRAM Opto Semiconductors GmbH & Co. manufactures optoelectronic semiconductor components for the lighting, sensor and visualization sectors. The company supplies products and system solutions for illumination, visualization and sensing. OSRAM Opto Semiconductors was founded in 1999 and is headquartered in Regensburg, Germany.

TEL Solar AG manufactures equipment for thin film silicon solar photovoltaic modules. It provides deposition of photovoltaic thin films converting light into electrical energy and laser patterning to generate the serially connected cells. The company was founded in 2003 and is headquartered in Trubbach, Switzerland.