BATTERY ENERGY STORAGE SYSTEMS (BESS)

Ensuring grid stability. Using energy more flexibly.

 

Battery storage systems play a key role in a decentralized energy system. They store electrical energy temporarily — for example from photovoltaic or wind power — and release it again when it is needed. In doing so, they balance fluctuations in generation and consumption and help match electricity supply and demand in real time.

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Today’s storage technologies are predominantly based on lithium-ion systems, which are characterized by high cycle stability, fast response times, and high energy density. Other technologies are currently under development or used in niche applications.

 

Use cases

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Grid Stabilization and Frequency Control

 

Battery storage systems help maintain the stability of the electricity grid. The grid must always operate at a frequency of 50 hertz - even small deviations can lead to disruptions.

Battery systems can supply or absorb electricity within fractions of a second to stabilize the frequency. This so-called primary control reserve makes battery storage an important building block for energy security in the age of renewable energy.

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Decoupling Generation and Consumption

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Solar power is generated primarily around midday, when the sun is strongest. However, electricity demand is typically highest in the evening.

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Battery storage makes it possible to store generated energy temporarily and supply it when it is actually needed. This allows renewable energy production to be better aligned with consumption patterns.

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Integration into Virtual Power Plants and Trading

 

Battery storage systems can be digitally networked and combined with other power generators or consumers — for example in virtual power plants.

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These systems can then participate flexibly in the electricity market, respond to price signals, or provide balancing services. This supports the efficient use of renewable energy sources.

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System Sizing & Location Criteria

 

Battery storage projects can be built modularly — ranging from solutions with a few hundred kilowatt to large-scale installations with several hundred megawatt-hours of installed storage capacity.

Key location criteria include:

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• proximity to substations or other grid connection points

• suitable site sizes

• sufficient grid connection capacity

• regulatory and permitting feasibility

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We develop both stand-alone battery storage projects and co-location systems, meaning combined photovoltaic and storage installations — always tailored to grid requirements and economic conditions.

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System Relevance

 

Battery storage systems make a measurable contribution to energy security. They prevent grid congestion, reduce redispatch costs, and lower the long-term risk of power outages.

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By increasing flexibility in energy consumption and mitigating electricity price peaks, they contribute to a more economically stable energy supply — benefiting industry, businesses, and private consumers alike.

At the same time, fewer fossil-fuel reserve power plants are required, which reduces CO₂ emissions and accelerates the energy transition.