Swiss energy services provider Alpiq has acquired a 90 per cent stake in Harmony Energy, a prominent pan-European developer and operator of utility-scale battery energy storage systems. The strategic transaction instantly elevates Alpiq into one of the leading battery storage players on the continent, significantly bolstering its flexibility solutions portfolio. By integrating Harmony Energy’s established platform, Alpiq gains access to a substantial development pipeline spanning major European energy markets.
The acquisition perfectly aligns with Alpiq’s long-term strategy to scale up flexible, low-carbon infrastructure to support the European energy transition. By incorporating Harmony Energy’s capabilities, the Swiss firm will expand its presence across the entire battery value chain, encompassing initial project development, construction, and long-term commercial operations.
The transaction adds roughly 400 MW of battery assets currently under construction to Alpiq’s footprint. This includes a major UK project that is scheduled to connect to the electricity grid as early as the third quarter of 2026. Backed by a multi-gigawatt pipeline of prospective projects across the United Kingdom, Germany, France, and Poland, the deal positions Alpiq to build and operate a massive regional battery portfolio over the coming years. Due to the significant scale of the pipeline, Harmony Energy may still selectively divest certain projects to third-party investors in the future.
This corporate tie-up follows previous successful collaborations between the two entities. Alpiq had already purchased two individual battery projects from Harmony Energy, including the 100 MW Cheviré facility in France. Representatives from both firms noted that these prior transactions fostered deep mutual trust, laying the groundwork for the majority takeover.
Antje Kanngiesser, Chief Executive of Alpiq, stated that combining the company’s existing strengths in flexible power generation and energy management with Harmony Energy’s excellent pipeline allows the group to rapidly scale up its regional offerings. Amédée Murisier, Head of the Assets Business Division at Alpiq, welcomed the Harmony Energy workforce to the group, noting that the partnership accelerates growth in a critical sector for grid stability.
To date, Harmony Energy has successfully delivered 18 grid-scale battery projects with a total capacity exceeding 700 MW. Peter Kavanagh, co-founder and Chief Executive of Harmony Energy, remarked that Alpiq’s financial strength and extensive pan-European network create an ideal foundation to scale their project pipeline while maintaining institutional continuity.
Following the completion of the deal, Harmony Energy will retain its independent brand identity, core team, and entrepreneurial operating model. Peter Kavanagh will remain at the helm as Chief Executive and retain a ten per cent financial shareholding in the business. Christoph Bellin, Head of Battery Energy Storage Systems at Alpiq, will join the Harmony Energy Management Board whilst maintaining his current duties at the Swiss parent company. Both parties have chosen to keep the financial details of the acquisition confidential.
