Alpiq acquires Eco Stor’s 238MWh Bollingstedt project, formerly Germany’s largest
Switzerland-headquartered power firm Alpiq has acquired the 103.5MW/238MWh Bollingstedt battery energy storage system (BESS) in Schleswig-Holstein, Germany, from owner-operator Eco Stor.
Bollingstedt was brought online in July 2025, when it was the largest operational BESS project in Germany.
It is Alpiq’s third operational BESS project after the BESS Cheviré in France (100MW/200MWh) and the BESS Valkeakoski in Finland (30MW), and it has another 250MW under construction or close to commissioning.
It recently acquired UK-headquartered BESS platform Harmony Energy, which has a pipeline of projects in the UK, France, Poland and Germany. We caught up with Harmony Energy CEO Peter Kavanagh shortly after that transaction (subscription required).
CATL-backed CNTE supplies project
BESS integrator CNTE has supplied 50.94MW/101.592MWh of BESS equipment for the BESS Krumpa I project in Braunsbedra, Germany.
The BESS is primarily aimed to support solar PV generation, and was connected to the grid in April 2026, CNTE said.
It did not reveal the owner of the Krumpa I project. However, various company registries and databases online indicate it is owned by Munch Energie. That means it may be part of the 500MW of BESS that Munch announced it was connecting to the grid in March this year, which was said to be made up of 50MW/100MW projects.
CNTE was founded by Huang Shilin, the co-founder and former vice chairman of the world’s largest battery company CATL. CATL reportedly holds a 20% stake in CNTE. Shilin left his position at CATL in 2022 but remains a significant shareholder in CATL, and the two companies appear to have a very close cooperation.
CNTE also recently supplied the BESS for the largest project in Czechia.
Terralayr’s first ‘multi-asset capacity toll for BESS’ goes into operation
BESS owner-operator and virtual tolling platform firm Terralayr has delivered on its first fully operational virtual BESS toll to a customer.
In May 2025, Sweden-based power firm Vattenfall contracted Terralayr for 55MW of virtual BESS capacity via its LAYR platform, which disaggregates then aggregates BESS capacity.
Terralayr is aggregating eight decentralised BESS into one aggregated virtual battery for Vattenfall under a seven-year deal, and the portfolio is now fully operational.
Terralayr says the approach allows buyers and sellers of BESS’ flexible capacity to more seamlessly transact tolls of varying sizes and durations.
The assets remain within Terralayr’s balancing group and ancillary services pool. Vattenfall receives the flexibility from the aggregated portfolio, while Terralayr handles technical aggregation, dispatch control, and balancing group settlement via LAYR.
The company said that the ability to redistribute capacity among the batteries is particularly useful in light of flexible connection agreements (FCAs) which limit individual projects’.
We chatted to CCO Mikko Preuss about its tolls with Vattenfall and RWE shortly after the deals were announced last year (subscription required).