BKW prepares four battery projects to invest in storage in Switzerland

BKW is intensifying its investment efforts in energy storage with four battery projects currently under study in Switzerland. The company is evaluating the viability of these installations in Mühleberg, Bickigen and Bassecourt as part of its strategy to develop infrastructure supporting the stability of the power grid. The feasibility studies aim to determine the technical, economic and legal conditions required for compliant and profitable implementation.

Strategic locations and projected capacity

The selected sites are located near existing transformer stations, allowing for direct integration into the transmission or distribution grid. In Mühleberg, two projects are being analysed: one with 400 megawatts and 800 megawatt-hours in partnership with Swissgrid, and another ranging from 60 to 100 megawatts under BKW’s direct management. The two other projects concern Bickigen (100 megawatts) and Bassecourt (100 megawatts), each with 200 megawatt-hours of storage.

These projects reflect BKW’s intention to anticipate future grid needs in the face of increasing production variability. The batteries are designed to absorb excess electricity, store it temporarily, and release it during peak demand, thereby improving the overall system balance.

Investment dependent on study results

The feasibility studies are expected to conclude by spring 2026. They cover technical connection to the grid, projected costs, associated risks, and necessary mitigation measures. BKW has confirmed that investment decisions will be based on the technical and economic outcomes of these assessments.

The company relies on its experience gained in Germany, where it already operates several facilities, including a 300-megawatt plant in Waltrop. In Switzerland, these projects represent a new phase of investment in large-scale storage infrastructure, with first commissioning dates expected between 2028 and 2030 depending on the site.