Barsinghausen | S4 energy

S4 Barsinghausen
Energy Storage for a Renewable Grid

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In Development

Ready-To-Build

Under Construction

4

Site In Operation

About S4 Barsinghausen

The BESS Barsinghausen project is a 15 MW / 30 MWh battery energy storage system located in Großgoltern, near Barsinghausen in Lower Saxony, Germany. Originating from Terra One’s acquired BESS portfolio, the project represents a further step in S4 Energy’s European flexibility strategy.

Currently under development, the site will connect directly to Avacon Netz’s infrastructure, providing flexible capacity to support grid balancing and the integration of renewable energy in a predominantly rural region.

Project Details

Capacity 15 MW / 30 MWh
Duration 2 hrs
Status Under construction
COD Q4 2026
BESS OEM / EPC To be confirmed
Grid operator Avacon Netz

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Project Highlights

  • Part of S4's German BESS portfolio supporting Europe's energy transition
  • 15 MW / 30 MWh battery system delivering regional grid flexibility
  • Direct connection to Avacon Netz infrastructure in a rural grid area
  • Designed with integrated ecological compensation measures

Impact

It is estimated to avoid up to 31.042 tonnes of CO₂ emissions per year, equivalent to:

  • Approximately 17,000 carstaken off the road
  • Clean power flexibility comparable to 16,600 homesannually
  • Avoiding the emissions of roughly 8,623 flights
  • Comparable to the annual CO₂ absorption of 1,410,977 trees
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Frequently Asked Questions

S4 Barsinghausen contributes to the energy transition by increasing grid flexibility and supporting the integration of renewable energy in Germany. By connecting directly to Avacon Netz’s substation, the project helps balance electricity supply and demand in a region with limited grid infrastructure. This addresses a key challenge of the energy transition: ensuring system stability as renewable generation continues to grow across Europe.

The project reinforces S4 Energy’s European flexibility strategy by expanding its operational footprint in Germany as part of the Terra One portfolio. Its rural location and direct substation connection make Barsinghausen strategically distinctive, enabling efficient grid balancing in an area that is underserved by existing grid infrastructure.

In addition to providing grid stabilisation services, the project integrates ecological compensation measures directly into its design. These include the planting of native trees and shrubs, biodiversity maintenance, and mandatory three-year environmental monitoring, aligning technical development with sustainability objectives.

Health, safety, and environmental protection are core priorities for the project. S4 Energy is developing BESS Barsinghausen in collaboration with the municipality, landowner, Avacon Netz, and a specialised EPC contractor (to be confirmed), ensuring full compliance with applicable statutory and industry standards throughout development and delivery.

Cooperation has focused on close coordination with the municipality and landowner to ensure compliance with spatial planning and environmental requirements. The project’s rural siting minimises impact on residents while strengthening local energy infrastructure by improving grid flexibility without adding significant environmental burden. In doing so, the project delivers local value by supporting a more reliable and future-proof electricity system.

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