Stories | Return

10-09-2025

Return partners with BESSMART to grow energy storage in Eastern Germany

Return, a leading independent European energy storage provider, announces its partnership with Berlin-based BESSMART to acquire four strategic battery energy storage locations in Eastern Germany, totaling 310 megawatts (MW) and 670 megawatt-hours (MWh).

24-04-2025

Return starts construction Antares: mega battery energy storage in Waddinxveen, NL

A 100 MW / 200 MWh battery energy storage system in Waddinxveen, capable to power 50% of the city of The Hague, is set to go live mid 2026 and has a critical role in stabilizing the Dutch grid and accelerating the transition to renewable energy.

18-02-2025

Return redefines energy storage with Mufasa, one of Europe’s largest battery storage systems

Return, Europe’s leading independent energy storage provider, has announced the next phase of project Mufasa—one of the largest battery energy storage systems (BESS) in Europe—developed under its Lion Storage brand.

04-02-2025

SemperPower rebrands into Return, Europe’s number one in flexible energy

Return, the leading European independent energy storage provider, today announces a transformative update: Dutch market leader SemperPower will now operate under the Return brand.

24-09-2024

Return and Benbros Energy sign agreement to develop more than 500 MW in storage projects in Spain

The joint venture between the two companies is one of the most important agreements in the development of storage projects in Spain to date.

19-09-2024

Return invests and commits over EUR 50m in Hamburg-based J&P to boost European energy storage

Return has acquired a majority stake in Hamburg-based J&P Batterie Projekte GmbH with a €50 mln investment and commitment.

25-06-2024

Lion Storage’s 350 MW project secures its irrevocable building permit

Project Mufasa, a groundbreaking Dutch utility-scale Battery Energy Storage System (BESS), has reached a major milestone as its building permit has been granted irrevocably.

20-12-2023

Pollux, Netherlands' largest operational BESS is energized and ready to go

Another significant achievement at SemperPower as we have taken over our third utility-scale energy storage project, Pollux.

07-12-2023

Amsterdam-based Return unveils second EUR 100m investment to drive energy transition in Europe

Big news for the energy transition in Europe. Return raised EUR 100m growth equity to invest in the development of new renewable energy projects!

29-11-2023

Castor, Netherlands' largest operational BESS is energized and ready to go

SemperPower has, after the successful installation by Rolls-Royce, taken over control of its second utility-scale energy storage project Castor.

Updates, stories and perspectives from the Return universe.