FlexGen and Eos Energy Enterprises, two US energy storage sector companies with different specialisations, have entered the European market.

On 19 December, a fire occurred at energy storage developer Convergent Energy & Power’s Church Street Battery Storage Facility in Warwick, New York, US.

As we welcome the end of another year and greet the next, here are the top 10 most-read news stories from 2025.

The market share of vertically integrated battery cell and BESS companies has fallen since 2023, market intelligence firm Rho Motion said.

Two North American companies, Powin and Li-Cycle, were recently acquired by FlexGen and Glencore, respectively, after announcing bankruptcy.

“It’s the most powerful BESS in the world,” Nick Carter of Akaysha Energy, tells ESN Premium after switching on the Waratah Super Battery in New South Wales, Australia.

FlexGen “felt compelled to step up” and ensure the continuity of operation of the more than 11GWh of assets deployed by acquisition target Powin.

Wood Mackenzie’s BESS supply rankings list shows ‘intensifying regional competition and shifting dynamics’ as Tesla remains number one.

Software-focused energy storage system integrator FlexGen’s bid to acquire assets from bankrupt rival Powin has been approved in court.

FlexGen Power Systems (FlexGen) has bid to take over rival US system integrator Powin during the latter’s Chapter 11 bankruptcy proceedings.