We catch up with James Mills, managing director of UK BESS investor Adaptogen Capital, about UK market dynamics, its expansion into Europe, and BESS capex in 2026 and beyond.

A quartet of Germany BESS project announcements: Green Flexibility has completed a project, Suncatcher has enlisted Statkraft to optimise three solar-plus-storage ones, SWB and Be.storaged are together building a system, while ArcelorMittal has enlisted EDF Power Solutions to do so.

IPP R.Power has enlisted power firm Axpo to optimise a 300MW/1,200MWh BESS in Poland, one of the largest such deals seen in Continental Europe.

Large-scale BESS projects have been progressed to construction, financing or operations across the EU this week, by project owners, investors and EPC firms re:cap, LONGi, Teos, Flower, Goldbeck Solar, SPP and Tavion.

There’s been progress on several large-scale BESS projects in the UK, with Matrix Renewables securing financing for its Eccles project and BW ESS enlisting EDF to optimise its Hams Hall one; plus smaller announcements.

US investment group Pantheon Atlas LLC has a planned 1GW hyperscaler data centre campus in Croatia will be supplied entirely by renewables.

Energy trading firm Second Foundation is building three grid-scale BESS projects in the Czech Republic totalling 307MW this year, with the technology provided by local firm Gaz Energy.

LG ES posted a quarterly loss in Q1 2026 financial results this morning, partly due to investments in energy storage system (ESS) cell manufacturing.

Saleel Anthrathodiyil at Telgian Engineering & Consulting discusses changes in the 2026 edition of NFPA 855.

We hear from industry sources about the significance of the CATL-HyperStrong sodium-ion BESS battery deal. Does it make a real turning point for the technology as an alternative to lithium-ion?