Kungälv municipality, located in the Gothenburg region, has taken a front-running position in the Swedish energy transition. By enabling the region’s first large-scale battery energy storage system (BESS), the municipality is now playing a vital role in stabilizing both the local and national power grid – making productive use of land that would otherwise remain unused. So, what prompted the decision to approve the 15 MW battery system? And what have the outcomes been?
It all started in 2021, following discussions with the local grid operator, Kungälv Energy, about how battery systems could support the region’s electricity grid. Flower began searching for a suitable location near the regional grid station where a 15 MW battery system could be built. After thorough investigation, a small strip of land was discovered, hidden away between two properties – unsuitable for any other use.
However, as with all of Flower’s battery development projects, finding the appropriate location was only one of the first minor steps. Before construction could begin, the project had to pass through multiple critical phases to ensure a successful building process.
“Our projects are built in close collaboration with the local community, the industries in the area as well as with the municipality and land owners, to ensure we reach a win-win situation for everyone”
– Mikael Bergmark, Head of Project Development Nordics at Flower
Mikael Bergmark, leading Flower’s Nordic asset development team, was one of the key initiators and project managers for the Kungälv battery build. He approached the Kungälv project similar to how Flower as a company undertakes all of its battery projects.
“We first ensured the land was appropriate for construction, that all necessary permits were in place, collaborating closely with local water- and fire authorities to make sure the project wouldn’t interfere with nearby nature or industry, and several other crucial steps. This thorough process is led entirely in-house by Flower’s experts in battery development and in close collaboration with the local community, the industries in the area as well as with the municipality and land owners, to ensure we reach a win-win situation for everyone,” he says.
On the other side of the battery project pipeline was Miguel Odhner, the mayor of Kungälv municipality. He early on realized the potential of energy storage systems and was enthusiastic to hear about Flower’s plans in Kungälv. It also aligned well with new national energy policy initiatives that put pressure on the region at the time.
“Before this project started, the Swedish government tasked the County Administrative Board with finding a model to double Sweden’s energy production within five years. This initiative was great, since it politically forced us in Västra Götaland and all regions to work together and establish a unified energy policy for how to produce energy. Flower’s project emerged as part of this momentum, helping us maintain a leading role in employment, industry, and of course, the climate,” says Odhner.
“This has helped us maintain a leading position in terms of employment, the industry, and of course, the climate.”
– Miguel Odhner, Mayor of Kungälv Municipality
Battery energy storage systems (BESS) come with several clear advantages for municipalities. They stabilize the local grid, support renewable energy integration, and help position the municipality as a leader in sustainable innovation. However, municipalities considering these modern infrastructures often associate them with certain risks and complications. Safety, noise, radiation, industrial disruption – valid yet virtually overstated concerns that can overshadow the benefits.
When Flower approached Kungälv Municipality with its plan to build a state-of-the-art energy storage system, these concerns were naturally part of the conversation. Through constant dialogue and collaboration, Flower helped Kungälv to put the risks and concerns into perspective, resulting in a trouble-free and smooth building process.
“With this project, Flower has showed political responsibility for future sustainable business models.”
– Miguel Odhner, Mayor of Kungälv Municipality
After two years of planning and development, the 15 MW battery system was inaugurated in September 2024. The municipality was now a facilitator of a low-cost, low-maintenance infrastructure that supports grid stability and enables the continued expansion of renewable energy.
Catching up with Miguel six months after the inauguration, he underscores that the board of Kungälv Municipality have been thoroughly satisfied with how the project unfolded, and especially the pace at which Flower has been operating.
“We honestly haven’t had to think much about the battery system since it went operational, which is a good sign. Flower worked fast, and that speed has been greatly appreciated. Politicians often debate wind or nuclear power, but we’re all running out of time. It’s therefore crucial we act quickly to secure investments in new energy infrastructure. With this project, Flower, as our partner, has shown political responsibility for future sustainable business models, and we are glad to be one of the municipalities that have been part of leading this transition.”
With its core in battery storage optimization and trading, Flower has gained market-leading expertise around the capabilities of energy storage and the value that battery systems can bring to the power grid. By staying on top of the developments in energy markets where battery capacity is traded and optimized, Flower is able to use this knowledge to develop battery systems that generate the most value for the future market. Flower is currently in the process of developing several new projects in both Sweden and Europe, aiming to lead the way towards the energy system of tomorrow.