The US has retained its lead since then, however. LCP Delta said Europe deployed 13.5GW/26.4GWh of new electrochemical storage in 2025, while a US Solar Energy Industries Association (SEIA) report put together by Benchmark Mineral Intelligence counted more than 28GW/57GWh of new BESS installations in 2025.

Nonetheless, with the emergence of a variety of markets across Europe by geography and application, US players like software-focused battery storage system integrator FlexGen are seeing big potential across the Atlantic.

“We really spent the last couple of years having conversations in the market, gathering data, learning about the European market,” Jason Abiecunas, FlexGen executive VP for business development, tells ESN Premium.

That includes evaluating similarities and differences with the US market, in which the system integrator is better known, and how the company may want to position itself differently in the new one.

Fundamentally, Abiecunas says, Europe is a “tremendously important market for energy storage.”