The expansion of battery storage in Germany is gaining significant momentum in 2026. At the same time, it's becoming increasingly clear: Without storage, the full potential of photovoltaics cannot be realized.
Battery storage expansion in Germany reaches new highs
According to current analyses by the German Solar Industry Association, more than two gigawatt-hours (GWh) of new storage capacity were installed in the first quarter of 2026. This corresponds to a growth of approximately 67 percent compared to the same period last year.
Overall, the Battery storage inventory in Germany so that approximately 28 GWh, distributed across around 2.5 million installations. This capacity could theoretically cover the daily electricity needs of around three million households.
The market is developing particularly dynamically in the area of Large-scale battery storageInstallations with more than one megawatt-hour of capacity saw nearly a fourfold increase in new additions.
Globally, photovoltaics are growing faster than their integration
Although the expansion of photovoltaics in Germany is slightly stagnating, solar energy is expanding globally at high speed. According to analyses by the British non-profit organization and energy think tank Ember, global solar power generation increased by around 30 percent in 2025.
The challenge: A large part of this generation is not yet flexibly controllable. Without sufficient storage capacity it continues to PV system regulations – especially in the event of grid bottlenecks or negative electricity prices.
Why battery storage is crucial for the energy transition
Battery storage systems play a central role in the energy system:
- Securing grid stability: Balancing fluctuations in wind and solar power generation
- Avoid capping Storage Instead of Loss of Renewable Electricity
- Optimize load management: Using electricity exactly when it's needed
- Lower system costs: Reducing the need for fossil fuel reserve power plants
Just in the interplay of Photovoltaics and battery storage – for example in co-location concepts – a significantly higher systemic benefit arises.
What does co-location mean for PV and battery storage?
Under Co-location The direct combination of PV systems and battery storage at a single location is understood. The advantage:
- Direct and local storage of electricity at the generation facility
- Reducing network bottlenecks
- the profitability of the investment is increasing
- targeted marketing of flexibility
This turns a pure generation plant into a controllable component of the energy system.
Market barriers are hindering further expansion.
Despite strong growth, the German Solar Industry Association further regulatory action is needed. The following points are considered critical in particular:
- complex and slow network connection procedures
- unclear or detrimental grid fee regulations
- lack of equal treatment of storage facilities in tenders, as within the framework of the Network packets
- Limited incentives for system-beneficial operating modes
Without adjustments, the gap between generation and flexibility threatens to widen further.
Conclusion: Battery storage systems are becoming a key technology
The strong expansion of photovoltaics makes it clear: the energy transition is entering a new phase. The focus is no longer solely on generation, but rather on its integration into the energy system.
Battery storage in Germany are the central prerequisite for efficiently, economically, and grid-friendly utilizing renewable energies.
The current record expansion is an important step – but it will be crucial to see how quickly regulatory frameworks and market mechanisms catch up.
Frequently Asked Questions
Batteriespeicher sind ein wichtiger Bestandteil der Energiewende, da sie dazu beitragen können, die Zuverlässigkeit und Stabilität des Stromnetzes zu verbessern, wenn erneuerbare Energiequellen wie Sonne und Wind genutzt werden. Da diese Energiequellen intermittierend sind, können Batteriespeicher überschüssige Energie speichern, wenn sie reichlich vorhanden ist, und sie abgeben, wenn die Nachfrage hoch ist oder die Energieerzeugung gering ist. Dies hilft, den Bedarf an fossilen Brennstoffen zur Deckung von Spitzennachfragezeiten zu decken und die allgemeine Abhängigkeit von nicht erneuerbaren Energiequellen zu verringern.
Battery storage systems make it possible to shift electricity from renewable energy sources in time. They compensate for fluctuations in wind and solar power, reduce curtailment, and contribute to grid stability. This also reduces the need for fossil fuel reserve power plants.
How are battery storage systems currently developing in Germany?
According to the German Federal Association for the Solar Industry, over two gigawatt-hours of new storage capacity were installed in the first quarter of 2026. This represents growth of around 67 percent compared to the previous year. The market for large-scale storage is growing particularly strongly.
What is co-location in photovoltaics and battery storage?
Co-location describes the combination of PV installations and battery storage at one location. The electricity generated can be stored directly on-site and used or marketed as needed. This increases economic efficiency and reduces grid loads.
Why are PV systems without storage throttled?
Grid bottlenecks occur when more electricity is generated than can be consumed or transported. Without storage, excess energy must be throttled. Battery storage can absorb this electricity and make it usable later.
What advantages do battery storage systems offer companies?
For companies, battery storage systems enable better utilization of their own PV generation, reduce peak loads, lower energy costs, and open up additional revenue potential, for example, through participation in flexibility markets.
What are the challenges in expanding battery storage systems?
Among the biggest challenges are regulatory hurdles, complex grid connections, partly unfavorable grid charge regulations, and a lack of market incentives for grid-serving storage solutions.