A new innovation by Fraunhofer Institute for Digital Media Technology (IDMT) could significantly improve the sustainability and efficiency of solar energy systems. In collaboration with Silberform AG and J.v.G. Technology GmbH, Fraunhofer IDMT has developed an acoustic cleaning solution for photovoltaic (PV) modules that uses structure-borne sound to remove dust and sand without water or direct contact.

This novel approach is part of the AkSoRe research project, which is being supported by Germany’s Federal Ministry for Economic Affairs and Climate Action under the ZIM innovation program. The technology will be unveiled at the Intersolar trade fair in Munich, taking place from May 7–9, 2025.

Using targeted mechanical vibrations, the system activates the surface of PV modules to shake off accumulated dirt—addressing one of the biggest efficiency barriers in solar energy. Soiling can reduce energy yields by up to 20%, particularly in dusty desert regions where cleaning is difficult and water is scarce.

Unlike traditional methods that rely on brushes, pressure washers, or significant water use, this contactless system minimizes maintenance needs and environmental impact. Fraunhofer IDMT is contributing advanced simulation models and cleaning algorithms to optimize the placement and operation of the vibrational exciters. Silberform AG, with expertise in acoustic applications, is developing the core hardware, while J.v.G. Technology GmbH ensures compatibility with solar infrastructure.

With the global PV cleaning market expected to reach $1.85 billion by 2033, demand for low-impact, automated solutions is surging. This sound-based method positions itself as a scalable answer to an increasingly urgent challenge—keeping solar power clean, efficient, and truly green.

Live demonstrations of the technology will be held at Intersolar, Hall A2, Booth 236.