Germany’s Storage Capacity Expands To Over 25 GWh, Says BSW-Solar
Source：taiyangnews
Key Takeaways
- Germany’s stationary energy storage capacity has increased 5-fold in 5 years to more than 25 GWh, according to BSW-Solar
- In 2025, around 600,000 new systems totaling 6.5 GWh were installed, with large-scale battery projects more than doubling
- Residential storage demand fell by around 8% year-on-year, says the association
Stationary energy storage systems (ESS) are seeing a strong growth in Germany, having increased 5-fold over the last 5 years to exceed 25 GWh. The German Solar Industry Association (BSW-Solar) estimates close to 2.4 million systems now in operation in the country.
Yet, the association believes the growth is insufficient and needs to expand further to around 100 GWh by the end of this decade.
In 2025, nearly 600,000 new systems totaling 6.5 GWh of capacity were commissioned – an increase of around 5% compared to 2024. According to BSW-Solar, the market for large-scale BESS in the MW class boomed, more than doubling in size last year. The capacity of commercial storage systems installed increased by around 30%.
It expects the large-scale BESS segment to continue to grow in 2026. Earlier this month, Fraunhofer ISE pegged the capacity of large-scale BESS in Germany to have grown by 60% from 2.3 GWh to 3.7 GWh in 2025 (see Germany Installed 16.2 GW DC Solar PV Capacity In 2025).
Demand for residential storage systems declined by around 8% year-on-year (YoY). Growth in this segment will depend heavily on the regulatory framework for solar PV and heat pumps, the association stressed. It sees a combination of all 3 energy transition technologies – storage, solar PV, and heat pumps – as offering particular advantages, in terms of climate protection.
BSW-Solar estimates that the annual expansion of battery storage capacity would need to more than double to efficiently and largely transition the electricity supply to renewable energies in the coming years.
“In order for storage systems to reach their full potential, grid connection procedures should be accelerated and grid fee regulations should include incentives for system service in the future,” said BSW-Solar’s Managing Director, Carsten Körnig.
He also says that storage systems will work better if grid operators use more digital tools, so storage can be smoothly integrated into grid management.