ENN Solar Energy Launches New Silicon Thin Film Solar Modules With Tandem Junction Technology

July 16, 2009 by Jeff Shepard

ENN Solar Energy Co., Ltd. announced the launch of new silicon thin film solar products with the "tandem junction" technology. According to the company, the power output per installed Watt is much higher than that of conventional photovoltaic (PV) cells. The oversized modules can be used for a variety of applications, from utility scale ground mounted solar parks to integrated roof or facade solutions, classic large rooftop installations or solar covered carports and shading structures.

A subsidiary of ENN Group, China’s largest privately owned clean energy provider, ENN Solar Energy produces its solar PV modules with sizes up to 5.7m2 using the new tandem junction technology, providing significant cost benefits. With this technology, two layers of amorphous and microcrystalline silicon are applied to the glass substrate. The layer of amorphous silicon absorbs short-wave light, while the other layer absorbs long-wave light. So, the PV products are able to efficiently convert solar energy into electricity even in less than perfect weather conditions, such as low or diffused light and in hot climates. The energy payback time of ENN Solar modules is only half of that for crystalline silicon modules, setting standards for the industry. The company is mass producing its PV modules in order to reach 60MW production capacity by the end of this year.

"ENN Solar is working to become the technology and cost leader in silicon tandem junction thin film module manufacturing," says Dr. Rick Wan, General Manager of ENN Solar Energy. "We constantly are improving the efficiency of the modules, while reducing production costs. Our goal is to dramatically increase the performance of the solar modules, while cutting their cost by at least 30% compared to current price levels. We are working on reaching 10% stabilized conversion efficiency in the next two years."

ENN Solar’s PV modules are produced on the SunFab production line supplied by Applied Materials, Inc., a U.S. company. It is China’s first production line for silicon thin film tandem junction PV modules with a surface of 5.7m2. The SunFab line is setting a new standard for the industry, offering very low production costs per Watt. Modules made with SunFab are compliant with the strict requirements of the IEC (International Electrotechnical Commission). In fact, the new modules are said to be the first manufactured in Asia to secure TUV InterCert and IEC certification.