Isojoki Data Center Oy is developing a significant data center campus in Isojoki, in Western Finland. At this stage, the planned capacity of the project is assumed to be 40 MW, and an area of approximately 180 hectares has been secured for the project, making it one of the most significant data center projects in Finland. Isojoki Data Center Oy has selected Etha as the project development consultant to manage and coordinate the planning and permitting processes. The aim of the cooperation is to create a clear and efficient pathway from early planning to construction readiness, while ensuring alignment with regulatory, environmental and sustainability requirements.

The project will be carried out in different phases. The focus in the initial development phase will be on shaping a clear project vision, initiating dialogue with key stakeholders, and assessing critical technical and infrastructure opportunities related to energy, grid connections, and sustainability solutions. The aim is to ensure that the project is feasible, future-proof, and environmentally responsible.

As the project progresses, Etha will continue to play a pivotal role in guiding the project toward implementation by managing the permitting processes and coordinating essential studies as well as carrying out land use planning. In parallel, Etha will support the development of key infrastructure connections and stakeholder engagement. By combining local presence and networks in the area with technical, legal and commercial expertise, Etha supports Isojoki Data Center Oy in moving the project toward construction readiness.

Data centers play an increasingly important role in enabling and integrating sustainable energy solutions, and we at Etha are excited to contribute to the sustainable development of the data center sector in Finland.

We are pleased to have acted as Project Development Consultant in the Karsittu Solar Power Project, a significant renewable energy project located in Huittinen, in southwest Finland. The zoning plan for the planned solar power project has gained legal validity, marking an important step forward in advancing domestic, low-emission electricity production.  

The Karsittu solar power farm is being developed by Karsittu Green Energy Oy, with Etha Oy responsible for key development tasks throughout the project lifecycle. In its role as Project Development Consultant, Etha has ensured that technical feasibility, environmental responsibility, and regulatory compliance are all integrated into the project. Etha’s role has included project management, stakeholder engagement, support in the Environmental Impact Assessment process, as well as a variety of preliminary assessments for the solar farm. These have included, for example, layout planning, energy yield and feasibility analyses, visual impact studies, and CO2 calculations, all contributing to ensuring that the project meets both national legislative requirements and local planning objectives.   

“This project is a strong example of how careful planning and efficient cooperation between stakeholders can enable large-scale renewable energy development in Finland. It’s been rewarding to see the project progress steadily from early assessment to the building permit phase.”, states Artturi Kurhela, Project Manager of the Karsittu Solar Power Project.  

The planned solar power farm covers a total area of approximately 172 hectares, of which up to 136 hectares may be used for solar panels. At full scale, the project’s estimated grid-connected capacity is about 100 MW, with an anticipated annual electricity production of approximately 110 000 – 120 000 MWh. In addition, a Battery Energy Storage System (BESS) with a capacity of approximately 130 MWh and a maximum output of 65 MW is also planned for the area. BESS enables the storage of excess energy and its release during periods of high demand. With the zoning plan now approved, the project has progressed to the building permit application phase. 

The Karsittu solar power project demonstrates how professional project development can enable large-scale renewable energy investments in Finland. We at Etha are proud to contribute to the clean energy transition and the development of solar power in Finland.

Etha Oy is looking for a new Project Manager to strengthen our Development Services team and lead innovative projects across wind and solar power, battery energy storage, data centers, and hydrogen, guiding them from early planning and permitting to implementation.

By joining Etha, you will become part of a motivated and mission‑driven team dedicated to enabling the clean energy transition. With over two decades of experience in sustainable energy consulting, we continue to expand our impact and help shape Finland’s sustainable energy future.

Applications are open until 8 May 2026.

Read more about the role here.

At the end of 2025, Aurinkokarhu and Prime Capital reached an agreement regarding the continued development of the Tuovila BESS project, a Battery Energy Storage System (BESS) located in the municipality of Mustasaari, near Finland’s energy capital, Vaasa.

Etha is pleased to have contributed to the project by advising and managing the transaction for what is anticipated to be Finland’s first 125 MW, 4-hour Battery Energy Storage System, working closely with the Aurinkokarhu team to make the project investor-ready and to ensure a smooth path to closing.

Etha supported as transaction advisor throughout the project, managing the transaction and guiding the agreement negotiations. In addition, Etha’s role included preparing reports, including, for example, noise assessments, supporting the project in reaching ready-to-be-build status.

BESS enables a cleaner and more resilient energy system and is the cornerstone of the transition into renewable energy. BESS bridges the gap between electricity production and demand by storing excess energy when production is high and releasing it when demand rises. BESS stabilises the grid, reduces reliance on fossil fuels and enhances energy security.

We at Etha are proud to have contributed to securing financing for one of the most significant BESS projects in the region.

The Pyhäsalmi Battery Energy Storage System (BESS) project in Finland has reached a significant milestone with its successful sale completed on 10 March 2026. Sustainable Energy Solutions Sweden Holding AB (SENS) and Dovre Group Plc (Dovre) acted as sellers of the project company in a transaction valued at approximately EUR 5.5 million. Alongside the initial purchase price, a profit-sharing arrangement is in place until July 2027, provided the project is completed before that date. The share purchase agreement was signed between the parties in January 2026. The transaction was subject to customary conditions, which have now been fulfilled.

Etha is pleased to have acted as the sell-side transaction advisor in Pyhäsalmi BESS project, including transaction management services and legal support in respect of the negotiations. Etha further supported the transaction by advising on permitting, providing technical and project development expertise, and working actively with stakeholders.

The project, located in Pyhäjärvi, is designed to deliver capacity to both the frequency regulation and arbitrage markets in Finland. With a storage capacity of 85 MW / 170 MWh, the facility will contribute to increased flexibility and stability in the Finnish power system.

“The successful transaction reflects the increasing maturity of the Finnish energy storage market. Projects like Pyhäsalmi BESS are becoming an important part of the energy transition by supporting system flexibility and enabling further renewable integration. We are proud to have supported the development of this project and to contribute to the advancement of battery energy storage systems in Finland, and we thank all partners and teams involved for the excellent collaboration that made this milestone possible”, states Gergő Göcsei, Transaction Manager at Etha.

BESS enables the energy transition, bridging the gap between electricity production and demand. BESS stabilize the grid, reduce reliance on fossil fuels and enhance energy security. We at Etha are proud to have contributed to the progress of the Pyhäsalmi BESS project.

Etha joined the project in 2018 as Project Development Consultant, supporting the owners throughout the planning and permitting phases. Etha’s Engineering Services optimized the turbine layout based on field study findings while incorporating the latest technological advancements, and the Development Services team supported local negotiations to secure land access and managed the overall permitting process, guiding the project from the land use planning stage to the issuance of building permits. 

“Juthskogen has been yet another special project with characteristics of great wind conditions and lots of landowners. With transparent discussions and communication, we managed to optimize the local land use to profitable project.”, sums up Jukka Rönnlund, Project Manager at Etha. 

Later Etha’s responsibilities in the project expanded to transaction and legal advisory, including setting up of the virtual data room containing the project documentation, managing Q&As during buyer due diligence, and leading the agreement negotiations.  

“Combining techno-commercial understanding with agreement structuring has once again proven valuable in facilitating a constructive handover from the project initiators to the party constructing the wind farm.”, says Jessica Dahlfors, Transaction Manager and Legal Counsel at Etha. 

The Juthskogen Wind Farm consists of 14 planned turbines (a total output of 87 MW). The project’s land use plan and building permits have entered into legal force. The project’s environmental impact assessment procedure was carried out in 2019-2020, and the next phase of the project involves preparations for the final investment decision.  

The Juthskogen Wind Farm project serves as an excellent demonstration of Etha’s versatile role as a comprehensive project developer and strategic transaction advisor, highlighting Etha’s ability to manage and deliver complex projects across the entire development and transaction processes.  

Wind farms are essential in the transition to sustainable energy, and we are proud to play a key role in making it happen. 

Etha Oy, a leading sustainable energy consulting company founded in 2002, has grown significantly during the recent years, and has developed in terms of services, areas of expertise, and customer relationships. The company is now entering its next phase of development by becoming a part of Ametalis, a Nordic platform that brings together autonomous specialist companies under a decentralised model, with Ametalis acting as the holding company and long-term strategic partner. “I regard joining Ametalis as a natural next strategic step for Etha, as the company is now evolving into a medium-sized business and is pursuing new growth and development opportunities. Ametalis shares Etha’s mission of enabling the sustainable energy transition, and this makes joining specifically Ametalis a natural selection for Etha. I consider this a great opportunity.”, states Staffan Asplund, founder of Etha.

The partnership between Etha and Ametalis brings significant benefits to Etha’s customers. Etha will have access to a broader Nordic network, and the partnership will open up new opportunities for collaboration, knowledge-sharing, and innovative solutions, enabling customers to have access to top-tier consulting services within sustainable energy. In addition, active strategic and operational support from Ametalis enables Etha to maintain long-term stability and continue investing in sustainable growth. This ensures Etha can deliver even greater value to its clients as they pursue renewable energy and sustainability goals. “Etha has successfully developed its business over the years, and I believe this is the right time for Etha to become part of a larger group that shares the same mission and vision, which also serve as Etha’s sustainable business drivers. Ametalis will offer Etha active support in developing the company further, and the collaboration will provide Etha with new opportunities for growth and access to a wider industry network that will also benefit our customers. I look forward to beginning our cooperation with Ametalis.”, says Marko Ekman, Managing Director of Etha.

In connection with the ownership change, Staffan Asplund will continue his engagement in Etha by taking on the role of Chairman of the Board, while Marko Ekman is appointed as Managing Director of the company. Current shareholders in Etha will reinvest and become owners in the group. “Companies joining Ametalis will retain autonomy over the operative management of the company, and this was also crucial for Etha to join Ametalis. This unique collaboration will offer significant development possibilities and at the same time Etha will retain its operational responsibility, organisational culture and strong local brand which are crucial for the success of the company.”, confirms Staffan Asplund.

“We are pleased to welcome Etha and its team to Ametalis. Etha’s sustainable energy expertise, clear market position and trusted brand make a strong addition to our group and mark an important step in Finland. Becoming part of Ametalis creates new growth opportunities while preserving Etha’s entrepreneurial spirit. We very much look forward to starting this new partnership.”, states Kim Lehmusvuori, CEO of Ametalis.

The change in the ownership structure of the company takes effect immediately.

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Etha Oy

Etha is a leading sustainable energy consultancy with a mission to enable the energy transition, leveraging over two decades of experience in supporting renewable energy projects across wind, solar, and battery energy storage systems. The company offers expert services including full-scale project development, permitting, grid solutions, technical due diligence, and comprehensive transaction services. Etha serves a wide range of customer segments through specialised business units and has participated in over 20 GW of clean energy projects in Finland and beyond. The company employs approximately 40 professionals in offices located in Helsinki, Tampere, Oulu, and Vaasa.

Ametalis AB

Ametalis is a Nordic group of specialist companies in technical and environmental consulting services. With sustainability embedded as an integral part of its operations, the group contributes to shaping a future in which industry, infrastructure and community development are characterised by long-term responsibility and technical expertise – from planning through implementation. Operational since 2023, Ametalis operates under a decentralised model while providing companies with the shared resources, tools, and strategic expertise required to help unlock new growth opportunities. The group’s expertise spans sustainability consulting, environmental analyses across soil, water, air and ecology, as well as technical solutions for infrastructure and industry. In 2025, the Swedish investment firm MVI became the majority owner of Ametalis, forming a long-term partnership and providing the capital and strategic support required to expand the group’s Nordic platform.

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Additional information:

Staffan Asplund, Etha Oy

+358  44 380 9237

staffan.asplund@etha-consultancy.com

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Marko Ekman, Etha Oy

+358 50 526 5293

marko.ekman@etha-consultancy.com

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Kim Lehmusvuori, Ametalis AB

+46 72 151 8013

kim.lehmusvuori@ametalis.com

Etha is pleased to have acted as a sell-side transaction advisor for Pyhäsalmi BESS (Battery Energy Storage System) project, including transaction management services and legal support in respect of the negotiations. Etha further supported the transaction by advising on permitting matters and providing technical and project development expertise.

The project is located in Pyhäjärvi, adjacent to the closed Pyhäsalmi mine. The energy storage facility has a capacity of 85 MW and an energy storage capacity of 170 MWh. The facility will contribute to balancing the grid and enhancing system flexibility.

Sustainable Energy Solutions Sweden Holding AB (SENS) and Dovre Group Plc (Dovre) have signed agreement on selling the Pyhäsalmi BESS Oy to a Frankfurt-based infrastructure investor with approximately EUR 2 billion in assets under management and a strong track record in the Nordic energy sector. Closing will take place during Q1 2026 subject to the fulfilment of certain conditions precedent.

“This transaction is a great example of how mature, well-structured energy storage projects in Finland are now attracting high-quality international capital. BESS will be a cornerstone of a resilient, renewable power system and Pyhäsalmi BESS is setting the benchmark.”, states Arnaud Defrance, Head of Transactions at Etha.

BESS enable the energy transition, bridging the gap between electricity production and demand by storing excess energy when production is high and releasing it when demand rises. BESS stabilise the grid, reduce reliance on fossil fuels and enhance energy security. We at Etha are proud to have contributed to the progress of the Pyhäsalmi BESS project. 

At the beginning of 2026, Etha Oy, a leader in sustainable energy consulting, is set to drive forward its strategic growth and enhance its organisational structure. This year marks a significant transition as Marko Ekman assumes the role of Managing Director as of February 1, 2026, guiding the company into its next phase of development.

Marko Ekman joined Etha in 2021 and has worked as Business Development Director and most recently as Director of Development Services in the company. Marko Ekman’s career spans nearly 30 years in various executive roles within the energy industry project business. “Having worked at Etha for four years now, I’ve been able to see and contribute to the company’s evolution. Etha has grown and developed significantly in terms of expertise, technology and customer relationships over these recent years. It has been great to work with Staffan Asplund and the Etha team, developing customer projects and advancing a meaningful business, and I look forward to contributing to the company’s continued development and growth in the role of Managing Director.”, states Marko Ekman.  

Etha’s founder and current Managing Director Staffan Asplund will move from the operational management of the company into the role of Chairman of the Board of Etha. “We are very pleased that Marko Ekman will take on the role of Managing Director. With extensive experience in leadership roles, a strong understanding of the renewable energy industry, and an extensive stakeholder network, Marko Ekman is well positioned to lead the company in the next phase of its development when the company is now evolving from a small enterprise into a medium-sized business.”, states Staffan Asplund.

Etha is a leading sustainable energy consultancy with a mission to enable the energy transition, leveraging over two decades of experience supporting renewable energy projects across wind, solar and battery energy storage systems. The company offers expert services including full-scale project development, permitting, grid solutions, technical due diligence and comprehensive transaction services. Etha serves a wide range of customer segments through specialised business units and has participated in over 20 GW of clean energy projects in Finland and beyond. The company employs approximately 40 professionals in offices located in Helsinki, Tampere, Oulu, and Vaasa.

Additional information: 
Marko Ekman 
+358 50 526 5293 / marko.ekman@etha-consultancy.com