Fraunhofer ISE raises its solar module efficiency record to 34.4% (opens in new tab)

In early 2026, a team at Fraunhofer Institute for Solar Energy Systems ISE of Freiburg, Germany working on the project Vorfahrt (Cost Reduction of III–V Cells and Modules for Aircraft and Vehicle Applications) fabricated an 833cm2 photovoltaic (PV) solar module with record energy conversion efficiency of 34.2%. The module consists of triple III–V germanium solar cells originally optimized for space applications, which project coordinator AZUR SPACE Solar Power GmbH of Heilbronn, Germany furth...