ENGIE Energy Storage Capacity Reaches 10.7 GW After European Expansion
ENGIE’s energy-storage portfolio has reached 10.7 GW in operation or under construction after the company added 1.1 GW/3.3 GWh of European battery projects during July and August.
Microgrid Media Editorial Desk
Published · 3 min read
ENGIE energy storage capacity has reached 10.7 GW in operation or under construction worldwide after the company expanded its European battery portfolio by approximately 1.1 GW/3.3 GWh during July and August 2026.
Europe now accounts for about 4.7 GW of the portfolio and the United States for another 4.4 GW. The total combines battery energy storage systems with pumped-storage hydropower, so it should not be interpreted as 10.7 GW of batteries alone.
European batteries drove the latest expansion
The ENGIE storage portfolio announcement identifies acquisitions, construction starts and newly commissioned facilities across seven European countries.
Poland represents the largest disclosed addition. ENGIE assembled a 758 MW/2,156 MWh portfolio that includes the ready-to-build Tursko Wielkie project in Osiek, an adjacent development and a separate acquisition in the Łódź region.
The Tursko Wielkie assets are expected to form a combined 320 MW/1,280 MWh facility, while the Łódź-region acquisition adds 438 MW/876 MWh. ENGIE expects the Polish projects to enter operation between 2028 and 2029.
In Romania, the company acquired a ready-to-build 54 MW/216 MWh battery project in Călan. The project is scheduled for operation in 2029 and supplements 85 MW/170 MWh that ENGIE already has under construction in the country.
Projects advanced in five additional countries
ENGIE also acquired a 66 MW/264 MWh project in Tarifa, Spain, where the company already has a 200 MW/800 MWh development underway. Both standalone and co-located systems are represented in the broader European portfolio.
Construction has started on a 74 MW/296 MWh battery at ENGIE’s Coo energy hub in Belgium. The site also includes pumped-storage hydropower, solar installations and electric-vehicle charging infrastructure, illustrating how different flexibility resources can share a common grid connection.
Two smaller systems are under construction beside the Rallo and Mourisca wind farms in Portugal. Each is rated at 10 MW/45 MWh and scheduled for commissioning in 2027.
In Scotland, ENGIE commissioned its first two United Kingdom battery projects. The Cathkin and Broxburn facilities provide a combined 100 MW/200 MWh.
The company also highlighted BESS Maxima in Lelystad, the Netherlands. That 35 MW/100 MWh battery was inaugurated June 30 and sits alongside a solar farm and thermal power plant.
The 10.7 GW figure includes multiple project stages
The ENGIE energy storage capacity total combines projects already operating with projects still under construction. Projects that have only been acquired or described as ready to build may contribute to the recent European expansion figures without yet supplying electricity to the grid.
This distinction matters when comparing corporate portfolio announcements. Operating capacity represents assets capable of delivering energy and grid services today, while construction-stage and development assets still carry completion, permitting and interconnection risk.
EuropaWire’s detailed summary independently reproduces the reported project figures and regional breakdown, although the underlying information originates with ENGIE.
Storage is becoming a larger part of ENGIE’s portfolio
ENGIE’s latest disclosure shows how storage developers are spreading investment across both established and newer European battery markets. Poland and Romania account for substantial development-stage additions, while Scotland and the Netherlands contribute newly operating facilities.
Microgrid Media previously covered ENGIE’s expansion of a U.S. solar-and-storage partnership with Ares, providing additional context for the company’s storage strategy outside Europe.
The portfolio also reflects more than one storage duration and technology. Lithium-ion battery systems can provide rapid response and intra-day energy shifting, while pumped-storage hydropower can contribute larger-scale and potentially longer-duration flexibility.
Europe’s battery market has grown as renewable generation, wholesale-price volatility and flexibility requirements have increased. A Reuters analysis of the European storage market previously identified falling system costs and widening interest in grid-scale projects across the region.
ENGIE says the 10.7 GW milestone supports its broader target of reaching 95 GW of installed renewable and storage capacity by 2030. That target remains forward-looking, while the newly disclosed 10.7 GW figure includes both operational and construction-stage storage assets.
