RWE Approves 400MW Battery Storage System at Moerdijk

Sunrun and Tesla dispatched more than 580 megawatts of peak power from home batteries to California's grid on the evening of September 9, 2026, the largest distributed power plant dispatch event on record. The event drew on more than 140,000 home batteries and combined 517 megawatts from Tesla Powerwalls with 63 megawatts from additional batteries, with 110,000 Powerwalls participating and more than half of those, 55%, owned and operated by Sunrun, which also dispatched more than 30,000 of its customers' batteries from other manufacturers. The dispatch was requested by the California Energy Commission and utilities and ran for a three-hour evening period to increase the grid's operating margin and put downward pressure on real-time energy prices, coordinated through the California Energy Commission's Demand Side Grid Support program and the California Public Utilities Commission's Emergency Load Reduction Program. The DSGS dispatch was triggered by the California Independent System Operator's day-ahead locational marginal price exceeding $200 per megawatt-hour, while the ELRP dispatch was called by Pacific Gas and Electric Company for batteries in its territory. The following evening, September 10, Southern California Edison requested a three-hour peak dispatch and Sunrun and Tesla delivered more than 140 megawatts; had both events occurred on the same night, the companies could have delivered over 720 megawatts in a single dispatch. A report by The Brattle Group, commissioned by Sunrun and Tesla, found such programs could provide up to $206 million in net cost savings to Californians by 2028.

Covenergo and Delta Capacity have begun construction on the AKKU One battery energy storage system project in Lapinlahti, Finland, a stand-alone battery with 125MW of capacity and 300MWh of energy storage. The companies expect to commission the facility in the fourth quarter of 2027. AKKU One was acquired as a ready-to-build asset from Helios Nordic Energy, with Covenergo holding majority ownership and Delta Capacity serving as engineering, procurement and construction management contractor, responsible for offtake agreements, construction delivery and long-term asset management. Rejlers is providing technical project support, Sungrow will supply the battery system under a 1GWh framework agreement signed earlier this year, NYAB is conducting balance of plant works, Ampner is handling grid connection studies and compliance, and GreenPowerMonitor will provide energy management and supervisory control and data acquisition systems. Once operational, the project is expected to deliver flexibility services to the Finnish electricity network, including frequency regulation and balancing, as the country expands its wind and solar generation; for Delta Capacity, AKKU One is its second BESS project in Finland, following the 70MW/160MWh Ånge BESS completed in Sweden earlier this year.