Soltec, Fraunhofer team on solar concentrator PV system
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Fraunhofer Institute for Solar Energy Systems (ISE) and Soltec have teamed up to develop a prototype of a two-axis sun tracker for a new generation of concentrator photovoltaic systems.
The tracker for the solar concentrator is designed to smoothly integrate with Fraunhofer ISE’s latest micro-CPV technology, concentrating the light from the sun onto high efficiency cells.
Soltec, based in Murcia, Spain, and Fraunhofer ISE plan to install a first prototype in Spain by the end of 2024.
Soltec is a vertically integrated company specializing in the manufacturing of solar trackers for large-scale projects. Fraunhofer ISE has a long history in research on III-V and concentrator photovoltaics and the latest micro-CPV technology of the institute reaches 36 percent conversion efficiency. This also leads to a 30 percent increase in energy yield compared to conventional PV solutions.
The collaboration aims to use the solar tracker technology of Soltec and adapt it specifically to the requirements of a new generation of Fraunhofer ISE’s micro-CPV modules which operate at a concentration of nearly 1000 suns. The micro-CPV modules place stringent requirements on tracking accuracy along two axes since they must always point exactly to the sun throughout the day in order to achieve the maximum electricity generation.
“We are preparing the path for the re-entry of high-concentration photovoltaics into the market by offering a competitive product which shall convince investors with its high energy yield, robustness and sustainability.” said Dr. Frank Dimroth, department head of III-V and Concentrator Photovoltaics at Fraunhofer ISE.
“Resource efficiency is becoming an increasingly important topic in photovoltaics. Compared to the state-of-the-art, our micro-CPV technology reduces module areas by 30 percent and semiconductor materials by 1300 times at comparable power output. This helps to safe precious materials and energy in the production process and therefore improves sustainability.”
“This collaboration between Soltec and Fraunhofer ISE confirms the vision of both institutions. We look forward to continuing our collaboration in the future to further elevate the use of solar energy. These advancements not only represent a step forward in photovoltaic solar energy but also expand its application possibilities across various sectors,” said Eduardo de San Nicolás, Chief Strategy and Innovation Officer at Soltec.
The first prototype will be used to test the precision of tracking accuracy throughout the day. In a later stage, the system can be equipped with 15.7 kWp of micro-CPV panels.
The solar tracker is a requirement for power generation in concentrating PV modules and the new development targets a combination of structural robustness, scalability, cost competitiveness and the ability to coordinate precise movements with a wide range of rotation.
The new concentrating photovoltaic system can also be used in emerging sector trends such as solar hydrogen generation and AgriPV that combines solar energy generation with agriculture. The tracker’s ability to adapt to different orientations and topographic conditions makes it suitable for these applications. CPV modules also transmit diffuse radiation of the sun and allow plants to receive sufficient sunlight for their growth while protecting them from excessive high-intensity radiation.
www.soltec.com; ise.fraunhofer.de
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