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Colored building-integrated photovoltaic (PV) modules that replace roof or façade elements can be an attractive alternative to the traditional blue-black solar PV installations. Until recently, colored modules came with considerable efficiency losses. Now, there is a solution available in the PV market: colored PV modules that deliver at least 90 percent of the electricity yield of an ordinary module. Megasol Energie AG, a module producer from Switzerland, holds a license for the MorphoColor® technology which was developed and patented by Fraunhofer Institute for Solar Energy Systems ISE. Visitors at the BAU in Munich can view green and blue PV modules with the MorphoColor® technology at the Fraunhofer Building Innovation Alliance booth, and gold, silver and bronze-colored PV modules at the booth of Megasol Energie AG, from 17 to 22 April 2023.

“Transferring Fraunhofer ISE’s developments to industrial applications is always our overriding goal,” says Prof. Dr. Andreas Bett, institute director at Fraunhofer ISE. “That’s why we are so pleased to have achieved this together with Megasol Energie. Now the construction industry will have access to highly efficient, colored PV systems. The MorphoColor® technology also opens up new possibilities for  buildings with historical protection status.”

Megasol Energie AG is a Swiss manufacturer of solar modules and photovoltaic systems, with a particular focus on the growing segment of building-integrated PV. Megasol Energie AG combines new color options with a variety of design dimensions. Glass surfaces, or structures can be freely selected, as well as all sizes and shapes. “A solar module with "Solarcolor Morpho" colors achieves 94 percent of the efficiency value of a conventional black module. That’s phantastic,” says Michael Reist, Head of Public Relations at Megasol Energie AG.

“The particular color structure was inspired by the Morpho butterfly, whose intense blue wings create an angularly stable color impression over a wide range,” says Dr. Thomas Kroyer, co-inventor and developer of the MorphoColor® technology at Fraunhofer ISE. “With this technology, we can create a multitude of colors while allowing most of the sunlight to pass through the PV module glass. The underlying solar cells are hardly visible at all.” 

The MorphoColor® layer consists of a photonic structure in which an interference layer is combined with a geometrically structured substrate in such a way that a narrow-band  reflection peak results, yielding maximum results. It reflects a small part of the color spectrum and allows the rest of the sunlight to pass through virtually unhindered. The colored coating therefore only reduces efficiency by 10 percent relative or less, compared to an uncoated module. MorphoColor® coated panes can also be used for tinted building-integrated solar thermal collectors or also photovoltaic-themal (PVT) collectors.