RWTH Aachen University

The “Battery Atlas 2026” report shows consolidation in Europe’s battery market. More than 2,000 GWh of cell production capacity was announced in 2023, but the realistic forecast for early 2026 is around 1,190 GWh, including approximately 673 GWh led by Asian companies.

Germany added an estimated 6.57 GWh of stationary battery storage capacity in 2025, an increase of about 8% year on year, lifting total installed capacity to roughly 24 GWh. Growth was driven by industrial and large-scale systems, even as home storage installations declined alongside weaker rooftop solar demand.

An analysis by Eon and Aachen University shows how quickly heat pumps with and without photovoltaic systems and storage pay for themselves in different types of homes, also in comparison to gas heating. A heat pump with photovoltaics is usually more economical than without. Balcony solar usually pays for itself in three to six years. An accompanying survey shows that most people underestimate the economic viability of climate-friendly energy technologies.

Eight industrial and scientific entities in Germany have come together to pursue two key innovations in lithium-ion battery technology: the replacement of metal foils with a metallized fabric structure, and the use of silicon as anode material.

RWTH Aachen University and Forschungszentrum Jülich evaluated the data. It shows a growing demand for photovoltaic storage systems in 2019 and continued positive market sentiment lasting well into 2020.