WOOD & Company and Delta Capacity have brought the Nordics' largest battery energy storage system into commercial operation near Ånge in central Sweden, completing the project from procurement start to commercial operation in just 15 months.

A Record-Setting Project for the Nordic Region

The Ånge Storage Solutions facility is a 70 MW / 160 MWh two-hour battery energy storage system located in the SE2 bidding zone of Sweden's power grid. The project holds the distinction of being the largest battery storage system currently in operation across the Nordic countries. Its developers say the speed of delivery, from procurement start to commercial operation in under a year and a half, is itself a benchmark for the industry.

The asset was originally acquired as a Ready-to-Build project from RES in February 2025 by Ånge Storage Solutions AB, a joint venture formed between WOOD & Company Renewables Sub-Fund and Delta Capacity. From that point, the project moved through design, construction, and commissioning within the 15-month window.

Roles and Responsibilities Across the Partnership

Delta Capacity served as both co-investor and EPC manager on the project, taking responsibility for all phases from design through to commissioning. The delivery involved a broad network of specialist contractors and technology providers.

Sungrow supplied the battery system for the facility. Stenger & Ibsen Construction handled the balance of plant work, while Rejlers provided construction management support.

Green Power Monitor was responsible for the energy management system and SCADA, and Solvina managed grid code compliance. Ellevio, the grid owner, was also a key partner in the project's delivery.

On the commercial side, Centrica Energy will act as optimiser for the project, providing what the partners describe as 24-hour in-house trading and optimisation services.

What the Facility Will Do

Once fully integrated into Sweden's power system, the Ånge BESS is intended to provide grid flexibility to the SE2 bidding zone, which covers parts of central and northern Sweden.

The system is designed to offer rapid response capabilities and capacity for both frequency regulation and energy arbitrage across the Nordic power market, a market characterised by significant price volatility linked to the region's heavy reliance on weather-dependent renewable generation.

The project's backers say the facility addresses a specific gap in Sweden's energy infrastructure. While the country possesses substantial renewable resources, the ability to store and dispatch that energy flexibly has lagged behind generation capacity.

Grid-scale storage of this kind is positioned as a mechanism to help balance supply and demand as wind and other variable sources account for a growing share of total electricity output.

Investor and Developer Perspectives

Lars Björklund, Chairman of the Board of Ånge Storage Solutions AB, highlighted the collaborative nature of the delivery. "A project like this is never built by one team alone.

Ånge came to life through an exceptional partnership managed by a strong team from Delta Capacity. As renewable generation accelerates across the Nordics, this is exactly how grid-scale storage needs to be delivered: at speed, at scale, and through genuine collaboration," he said.

Robert Doucha, Investment Director at WOOD & Company Renewables Sub-Fund, described the asset as a significant addition to the fund's portfolio. "For WOOD & Company Renewables Sub-Fund, Ånge represents a high-quality asset in a strong regulatory environment, delivered by best-in-class project partners in construction, operation, and electricity trading. It is a significant addition to our portfolio and a strong signal of the value battery storage brings to the Nordic energy market," Doucha said.

Patrik Hes, CEO of Delta Capacity, framed the project's completion in the context of the broader energy transition and indicated that his company intends to continue building at pace.

"The Nordic energy transition is moving fast, and it needs infrastructure that can keep pace. Sweden has extraordinary renewable resources, but flexibility is the missing piece, and that is exactly what Ånge delivers. 160 MWh of grid-scale storage, brought to market in 15 months. Delta Capacity's ambition is to keep building faster and at greater scale, because the energy transition cannot wait," he said.

Context Within Sweden's Energy Landscape

The project sits within the SE2 bidding zone, one of four price zones into which Sweden's electricity market is divided. The zone encompasses areas where significant renewable generation capacity exists, making the ability to store and dispatch electricity at short notice particularly valuable for grid operators and market participants.

Sweden has been navigating a period of substantial change in its electricity system, with rising levels of wind generation contributing to periods of both surplus and scarcity at different points in the market.

Battery storage assets of the kind delivered at Ånge are increasingly seen as infrastructure that can help smooth out those fluctuations, enabling faster responses to frequency deviations and capturing price differentials through arbitrage strategies.

The Ånge project's 15-month delivery timeline, from the acquisition of the Ready-to-Build asset in February 2025 through to commercial operation, represents a notable pace for a project of this scale in the European energy storage market.

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