Rivejä valkoisia energiakontteja

Building Permit Granted for Finland’s Largest Battery Energy Storage System in Mikkeli

Neoen Renewables Finland Oy has obtained a building permit for a battery energy storage system in Visulahti area in Mikkeli, Finland. The planned battery energy storage system is long-duration and has a capacity of 120 megawatts. The system will consist of approximately 320 battery and transformer containers along with other equipment.

“The permit process was smooth, and the cooperation throughout the project with the City of Mikkeli has progressed excellently. Neoen’s 30-megawatt Yllikkälä Power Reserve in Lappeenranta, Finland, was the largest battery energy storage in Continental Europe upon its completion, and another battery energy storage with a capacity of 56 megawatts is currently under construction. We are delighted to start planning an even larger-scale battery energy storage system in Mikkeli,” says Project Manager Erika Forstén from Neoen Renewables Finland Oy.

The building permit issued by the City of Mikkeli became legally effective on April 18, 2024. The company leased a 6.3-hectare plot from the City of Mikkeli in September 2023.

“Green transitions projects are thriving in Mikkeli. For example several solar power projects are underway,” describes Program Director Jussi Heinimö from Mikkeli Development Miksei Ltd.

The national power grid with significant connection capacity runs through Mikkeli offering  good locations for electricity intensive operations.

Battery energy storage systems are used to balance the fluctuations in renewable energy production and regulate the frequency of the electricity grid to maintain its stability. Batteries serve as a fast-reacting backup power source.


For inquiries regarding Neoen, please contact Ville Perttula, Tekir Communications Agency, tel. +358 50 523 6494, ville.p@tekir.fi

Jussi Heinimö, Program Director, Mikkeli Development Miksei Ltd, tel. +358 40 544 0936, jussi.heinimo@mikseimikkeli.fi

About Neoen

Founded in 2008, Neoen is one of the world’s leading independent producers of exclusively renewable energy. With proven expertise in solar power, wind power and storage, the company plays an active role in the energy transition by producing and supplying competitive, green, local energy on four continents. After a six-fold increase in the last six years, its capacity in operation and under construction stands at 8.0 GW.

Neoen’s flagship operations are France’s most powerful solar farm (300 MWp) in Cestas, Finland’s largest wind farm (404 MW) in Mutkalampi, one of the world’s most competitive solar plants in Mexico (El Llano, 375 MWp) and two of the world’s most powerful large-scale storage plants, both in Australia: Hornsdale Power Reserve (150 MW/193.5 MWh storage capacity) and the Victorian Big Battery (300 MW/450 MWh).

A high-growth company, Neoen is targeting 10 GW in operation or under construction by the end of 2025. Neoen is listed in Compartment A of Euronext’s regulated market in Paris (ISIN code: FR0011675362, Ticker: NEOEN) and on the SBF 120 and CAC Mid 60 indexes.

For more information, please visit: www.neoen.com and finland.neoen.com

About Mikkeli Development Miksei Ltd

Through developing businesses, travel and business environment alike Mikkeli Development Miksei Ltdreinforces the attractiveness of the Mikkeli economic area by supporting 1200 companies each year. The company employs 40 experts in a variety of fields.​

The company implements the “Investment Promotion in South Savo” project, which aims to attract and promote investments in South Savo region.

For more information, please visit: mikseimikkeli.fi

aurinkopaneleiden edessä nainen kypärä päässään työskentelee tietokoneella

Nordic Generation Oy leases a solar power area from the City of Mikkeli

Solar power plant investment moves forward in Mikkeli: Nordic Generation Oy leases a solar power area from the City of Mikkeli. The leased area enables constructing a power plant of up to 100 MW. The Suursuo power plant could generate electricity as early as 2026.

The City of Mikkeli and Nordic Generation Oy have entered into a land lease agreement which enables the implementation of a large-scale solar energy investment. The city has made an official land lease decision. The parties will sign the lease agreement after the appeal period has expired.

The area leased is close to 130 hectares and is located some 18 kilometres north-east of the city centre on a land owned by the City of Mikkeli.

The Suursuo power plant could generate electricity as early as 2026, says Marko Salmela, CEO of Nordic Generation Oy. How the solar panel solutions will be implemented is under planning. Also, the environmental and nature studies required for consents are underway.

– We can build a power plant up to 100 MW in the leased area. We will know the final scope of the project as planning goes forward. Furthermore, we are interested in leasing more land from other landowners. Electricity transmission capacity is well available in the area as both Fingrid’s transmission grid and Visulahti substation are relatively close, explains Salmela.

– The City of Mikkeli will lease the area for 45 years. The leased area is partly a swamp area and we have assessed the importance of the area for forestry as negligible, says Topiantti Äikäs, Director of land use and planning of the City of Mikkeli.

Several solar power projects have started after suitable land was found in Mikkeli area last year. Professionals from the development company of the City of Mikkeli, Mikkeli Development Miksei Ltd. played a part in identifying suitable sites for solar power, marketing the sites to solar power companies, and helping the companies to move forward.

– This project increases the role of the Mikkeli region as a nationally significant producer of solar energy and will help new electricity-intensive businesses to locate in the region, says Jussi Heinimö, Programme Director at Mikkeli Development Miksei Ltd.

The Mikkeli region has plenty of areas suitable for solar power production. The main power grid that runs through the city allows solar power plants and other electricity-intensive businesses to connect to the grid.

Further information

Marko Salmela, CEO
Nordic Generation Oy
Tel. +358 400 164 981

Topiantti Äikäs, Director of Land Use and Planning
City of Mikkeli
Tel. +358 40 129 5152

Jussi Heinimö, Programme Director
Mikkeli Development Miksei Ltd
Tel. +358 40 5440 936

Nordic Generation Oy is a Finnish company established in 2022, focusing on the development and project execution of wind and solar energy projects. For this project Nordic Generation Oy has established a separate company called Mikkeli S SPC Oy based in Mikkeli.

Nordic Generation Oy is owned by Nordic Generation Limited of the UK, which is cooperating with Octopus Energy Generation. Octopus is one of the largest European investors in renewable energy.

Nordic Generation focuses on the Finnish market where the company has implemented wind farm projects since 2021. The company aims to invest in renewable energy in a way that benefits responsible consumers, communities, and investors to improve the living environment.

Read more: nordicgeneration.com

Ropolansuo, aurinkovoimala,

Helios Nordic Energy Finland Oy is planning an industrial-scale solar power plant in the Ropolansuo area in Haukivuori in Mikkeli.

Helios Nordic Energy Finland Oy is preparing to implement an industrial-scale solar energy project in Mikkeli.  The project area is approximately 35 hectares in size and the area, Ropolansuo in Haukivuori, is owned by the City of Mikkeli.

On Tuesday 24 October 2023, the City of Mikkeli has made a decision to reserve the land area for Helios Nordic Energy Finland Oy for a solar power project. The area has been reserved for Helios Nordic for 1.5 years after which the area can be leased to the operator for 45 years. The reservation was granted following a competitive tendering process in the summer.  Several companies participated in the tender.

“The City of Mikkeli welcomes the Helios project to Mikkeli and we believe that the project will proceed as an investment. The City of Mikkeli aims at contributing to the realisation of solar energy projects by developing its land use policies and processes,” said Topiantti Äikäs, the City’s Land Use Director.

Mikkeli has plenty of areas suitable for solar power generation. The national main grid which runs through the city allows solar power plants and other electricity-intensive activities to be smoothly connected to the power grid.

“With the investment projects of the companies, Mikkeli  has good prerequisites for becoming a nationally significant producer of solar power. We are happy to play our part in supporting the development of these projects,” says Jussi Heinimö, Programme Director at Mikkeli Development Miksei Oy, a development company of the city of Mikkeli.

Helios Nordic Energy Finland Oy started its operations in Finland in June. The company is currently developing large-scale solar parks in the Nordic countries. The company handles the entire project development cycle from pre-planning and tendering to site selection, grant licencing and grid access.

“We are starting the background studies required for the regulatory permits for the Mikkeli solar power plant as well as the preliminary design of the power plant including the connection to the electricity grid. The investment and construction decisions for the power plant will be made as soon as the planning and studies are completed.  The cooperation with the City of Mikkeli and Mikkeli Development Company Miksei has been excellent,” says Markus Ehrström, Project Development Director.

Solar parks can also be used to promote biodiversity. Crops can be planted for feeding endangered pollinators or grazing areas can be offered for grass eater animals. Building solar power plants offers another way to reuse peatlands.

Founded in 2019 and registered in Sweden, Helios Nordic Energy has several years of experience in energy industry. Helios Nordic Energy is one of the leading developers of solar energy in the Nordic countries. The company has currently more than 100 projects in the pipeline.

Further information:

Markus Ehrström, Project Development Director
Helios Nordic Energy Finland Oy
Tel. +358 400 428 823

Topiantti Äikäs, Director of Land use and Planning
City of Mikkeli
Tel. +38 40 129 5152

Jussi Heinimö, Programme Director
Mikkeli Development Company Miksei Oy
Tel. +358 40 544 0936

Helios Nordic Energy website: https://heliosnordic.com

Figure. The location of the Ropolansuo solar power project by Helios Nordic Energy Finland Ltd in Haukivuori, Mikkeli.


The City of Mikkeli and Neoen Renewables Finland Oy signed a lease agreement

Neoen Renewables Finland Oy is exploring the possibility of building an electricity storage facility in the Visulahti area of Mikkeli. The company has leased a 6.3-hectare plot of land from the City of Mikkeli for this purpose, and the lease agreement has entered into force on 15 September 2023.

Neoen Renewables Finland Oy is part of a global renewable energy company with operations in 18 countries. The company already has a 30 Megawatt energy storage facility in the Finnish city of Lappeenranta, which was the largest in continental Europe when it was completed. The leased site in Mikkeli would allow the construction of a much larger energy storage facility. The lease agreement allows for further studies on the suitability of the site for the electricity storage project.

The energy storage facilities will be used to balance the fluctuations in renewable energy production and to regulate the frequency of the electricity grid in order to keep the Finnish national grid stable. The batteries will act as a fast-response backup power. Similar backup power is currently produced, for example, at the Huutokoski gas turbine plant in Joroinen.

The City of Mikkeli sees the potential Neoen project as welcome and appropriate for the development of the Visulahti industrial area. The Visulahti area offers excellent connectivity to the national electricity grid and this type of green transition project is well suited to Mikkeli, says the city’s director of land use and planning, Topiantti Äikäs.

– The Neoen project could also bring other electricity-intensive activities to the area in the future,” says Äikäs.

Additional information:


Topiantti Äikäs, Director of land use and planning
Mikkelin kaupunki
Tel. +358 40 1295 152

Jussi Heinimö, Programme director
Mikkelin kehitysyhtiö Miksei Oy
Tel. +358 40 544 0936

South Savo Fund

Verstas Venture Builder: Redstone and Miksei offer a free startup coaching program

Mikkeli Development Miksei Ltd and venture capital fund manager Redstone invite potential start-ups to join a 12-week individual startup coaching program that launches in September 2023.

The purpose of the program is to help startups to develop their idea into solid business. The program is primarily aimed for startups that are based in South Savo or would consider the possibility to establish some of their key functions in the region.

Redstone organises the program and its partners Kaj Hagros and Oskari Lehtonen carry out the coaching. It contains both face-to-face sessions and online sessions. Most of the sessions are individually organised coupled with some common topic group sessions. Areas covered include eg. business model, customer validation, go-to-market strategy, fundraising, team development and board governance. Program participation does not require relocation, can also be entitely remote, and takes only a couple of hours per week during approx. 3 months. Hagros and Lehtonen are among the most experienced early stage investors, entrepreneurs and startup coaches in Finland with over 100 executed startup investments, several successful exits and four IPOs.

After the program companies can apply for venture capital funding from South Savo Growth Fund that is managed by Redstone. We estimate that including public grants and Redstone’s VC investment, companies could receive +200.000 euro funding packages initially.

Send your open application to henrietta.hirvonen@redstone.vc including a short description of your business and CV of founders Sep 10th.

About Verstas

Verstas Venture Builder project helps young growth companies get the best possible advice and support for growth. With the help of the project, companies may develop into attractive funding candidates for South Savo Growth Fund as well as other investors and public and private investors. The chosen companies receive coaching and mentoring assistance as well as various tools, the aim of which is to develop the company, test the business idea and make the company eligible for financing.

About MikseiMikkeli

We at Mikkeli Development Miksei Ltd match your company with growth opportunities and partnerships in the South Savo region, Finland. Our services range from startups to growth funding and from employer services to regional development projects.

About Redstone

Redstone is a European venture capital firm following selected investment strategies. Our focused approach with specialized investment teams for each strategy has enabled us to develop strong sector expertise and networks. This combination supercharges our portfolio companies. Redstone has offices in Berlin, Zurich and Helsinki.

More information

Marjo Niittuaho-Nastolin
+358 440 361 615

The coaching program is funded by the Centre for Economic Development, Transport and the Environment of South Savo, Mikkeli Region Fund and companies.

Lake Saimaa Purest Finland

Saimaa & South Savo

Living in Mikkeli and spending summers on the shores of Lake Saimaa offer a completely different way of life compared to the capital region.

Picture a jetty for swimming, a summer cabin, a sauna with a wood burning stove, a barbecue, a boat and a fishing rod.

Mikkeli is a part of the Finnish Lake District, and when thinking of the Lake District, the first thing to come to mind is, well, lakes. Mikkeli is located between a few big lakes – Lake Puula, Lake Kyyvesi, and of course, Lake Saimaa.

Lake Saimaa is the largest lake in Finland, and the fourth largest in Europe. It spreads accross Eastern Finland in small, crooked straits and larger open water areas. It’s unique shape makes for a fascinating landscape of rocky islands and hills. It is also the home of the Ringed Saimaa Seal, an endangered species of freshwater seal that doesn’t appear anywhere else. You can explore Lake Saimaa e.g. by paddling, cruises, boat, or SUP boarding in summertime, and by skiing, skating, or snowshoeing in wintertime.

Holiday villas and sauna

Holiday cottages and sauna are a vital part of Finnish culture and leisure time. During the best holiday seasons you can see city centres deserted, as all the Finnish holiday-makers have retreated to their cottages and second homes in the countryside. A cottage is preferably by a lake, and it always has its own sauna, where Finns can enjoy their hot and steamy löyly (it’s impossible to live without!). Mikkeli is one of the biggest second home regions in Finland, and aside from private cottage-owners, there is also a wide selection of rental cottages available.


Finns tend to have a strong bond with nature, and it plays a big part in the Finnish culture. Recreational activities like fishing work as a tool for relaxation, and many Finns make berry and mushroom picking trips to the forest every year. You can find berries and mushrooms almost everywhere, and picking them is also permitted to everyone according to the Finnish Every Man’s Rights. Just make sure to leave some for others as well! Hiking and camping are also great ways to enjoy and explore the wonderful Finnish nature, so why not make a trip to Neitvuori Hill or Repovesi National Park, for example, or go visit the ancient rockpaintings of Astuvansalmi?

Local food

As fishing, berry picking and mushroom picking are an important part of the local lifestyle, it is of course natural that you can see it also in the local cuisine. Local food is one of Mikkeli’s fortés, and especially recently many new restaurants specialising in local ingredients and natural flavours have opened their doors in the region. Places you have to absolutely try are for example restaurant Vino, Bistro Holvi and Sahanlahti Resort’s restaurant Koskivahti.

Headquarters City and Marshal Mannerheim

During the Second World War, Mikkeli operated as the headquarters city of Finland, and so all the war operations, led by Marshal Mannerheim, were issued from here. Having the headquarters left its mark on the city landscape and cultural life. Besides museums and landmarks, you can explore Mikkeli’s history on guided tours.

Manors and gardens

Manor houses have long traditions in Finland. Many of them date back to 16th century, and some as far as the 14th century. In Mikkeli region, many authentic manor houses still remain, such as Tertti Manor, Kyyhkylä Manor, and Kenkävero in Mikkeli, Löytö Manor in Ristiina and Kuninkaankartano Manor in Juva. Nowadays the manor houses offer many different services, such as local food, celebration services, accommodation, local products and handicrafts and different activities. Gardens are an important part of a manor’s milieu, but Mikkeli region offers also many other possibilities for a traveler interested in gardening. Visit for example Vanha Kilkkilä and Linkkumylly for a garden experience.

Ice sports and trotting races

Finland is famous for being good at winter sports, and the sport in the country is of course ice hockey. Mikkeli has very succesful teams in both ice hockey and bandy, and games are organised throughout the winter season. In summertime, the biggest sports events are the trotting races, and the largest of those races is the St. Michel trotting race, which is also the biggest annual event in Mikkeli. Come and see yourself what all the bustle is about!

Dance, classical music and metal

Open air dances are an exclusively Finnish phenomenon. Summer nights are the best time to head for a dance pavilion and have a try on classical dances such as valse, tango, foxtrot and Finnish humppa, as well as rock ‘n swing dances, such as jive or boogie. Almost every town or village has their own dance pavilion, so you can try it wherever you’re staying. Another great music event in Mikkeli is the Mikkeli Music Festival, also known as the Gergiev Festival. It takes place in late June or early July, and features almost a full week of concerts by St. Petersburg’s famous Mariinsky Theater’s orchestra. Local bands have gigs in pubs and bars around the year, so do go and check them out, and if you want to experience a wilder atmosphere, join the Jurassic Rock festival in early august in Kenkävero’s fields.

MikseiMikkeli ryhmäkuva

Eight Strengths of Mikkeli

Significant strengths of the Mikkeli region are its forest resources and Finland’s long industrial history in the forest industry. South Savo is Finland’s most forested region and eastern Finland has the fastest forest growth in Europe. The region has a significant cluster of forest industries, which also attracts forest technology companies.

The forest industry directly employs 2,300 people in South Savo, which corresponds to 4.1% of the region’s employment. However, direct income from forestry accounts for 9% of the region’s economy and, taking into account the multiplier effects, accounts for 17% of the region’s total economy. In addition to the traditional forest industry, future fields of economy in Mikkeli include bioproduct production, bioenergy expertise and environmental technology.

Somewhat unexpectedly, Mikkeli also has strong security sector expertise. For example, Mikkeli is home to the Finnish Army Command and Information Management Unit. The South Savo Rescue Department is also a pioneer in developing national rescue work. Mipro Oy develops railway safety systems, while Environics Oy’s main products are CBRNe monitoring systems. Platom Oy focuses on process modeling, analysis, and life cycle services for nuclear facilities, while Profium Oy focuses on data monitoring, storage and discovery. There are also other security sector companies in the region.

Another strength of Mikkeli is its geographical location. Eastern Finland’s core traffic flows through Mikkeli both by road and along the railway line.

The region’s position as one of Finland’s leading leisure areas is also one of its strengths. Mikkeli is Finland’s second largest ‘cabin municipality’ with 10,349 holiday homes. The large number of holiday homes is reflected in the local scenery and the city’s purchasing power, especially during the summer

Relative to its size, Mikkeli has a large student population that provides an educated workforce and a solid foundation for increasing skills. Almost 10% of the city’s residents are students. Furthermore, it is studied that workforce commitment in Mikkeli is higher than national average.

City of Mikkeli is the southernmost city in Finland, where 40% EU regional development investment scheme is available. Comparing start-up costs for example new industrial operations, strong investment support significantly lowers the capital requirement for newly established operations.

Costs are in control in Mikkeli, as land values, rent costs and salary costs are lower compared to e.g. capital area in Finland. The cost of an office or production facilities in Mikkeli is sometimes only 40% of the cost in the Helsinki metropolitan area.

Mikkeli offers quality of life for employers and employees alike. Simple things, such as owning your own home debt-free, having a summer cabin by the lake and having leisure time for family and hobbies, are achievable in Mikkeli.


Research and Education in Mikkeli

Mikkeli has traditionally been a strong student city. The city’s further education is organised by the South Savo Vocational College (Esedu), where some 3,000 young students and 5,000 adult students study annually. They offer 47 different undergraduate, 24 vocational and 8 specialist qualifications. Approximately 80% of graduates stay to work in the region.

The South-Eastern Finland University of Applied Sciences (Xamk) also operates in Mikkeli. The Xamk is the fifth largest university in Finland in terms of student numbers. Xamk offers higher education studies in 89 degree programmes to a total of 7,900 degree students. About half of the students study at the Mikkeli campus. The applied university also offers seven degree programmes in English.

Mikkeli University Centre is one of three educational units operating in the city and several different universities units are located on the campus of the University Centre. These include: Aalto University School of Business International Business Training Unit, University of Helsinki Ruralia Institute, National Library Digitisation and Conservation Centre, Lappeenranta-Lahti University of Technology (LUT) Entrepreneurship Research Unit and the Green Chemistry Laboratory training international postgraduate students.

Every year, about 250 undergraduate students at the campus study for the English-language Bachelor of Science in Economics programme and 320 in the Co-op Network Studies programme. Additionally, the University of Helsinki provides continuing education for approximately 1,150 students per year at the campus. The campus employs 130 permanent staff. Furthermore, the Natural Resource Centre, the Summer University and the campus’s Researcher Hotel offer facilities for about 150 experts and researchers.

According to surveys, Mikkeli, along with Kuopio, have the best cooperation between companies and educational institutions in Finland.

Mikkeli in Brief

Mikkeli (in Swedish St. Michel) is a city of 53,000 residents in eastern Finland. Based on its population numbers and purchasing power, the city is the regional centre of South Savo. Mikkeli is the 18th largest city in Finland. The eastern parts of the city are located on the shores of Lake Saimaa, Europe’s fourth largest freshwater area. In the west, the urban area of Otava borders the provincial lake Puula.

The city of Mikkeli covers an area of 3,230 m2, of which 681 m2 is water areas. In addition to the city centre, significant urban areas include Otava, Haukivuori, Anttola, Ristiina and Suomenniemi. 80% of the population live in built-up urban areas.

Founded in 1838, Mikkeli is one of Finland’s largest concentrated leisure areas. The city has 27,721 permanent households and 10,349 holiday homes. As 70% of holiday home owners live outside the economic area, second home ownership is a significant factor in the city’s service structure and purchasing power. On average, a holiday home is used for 85 days a year.

In 2022, the Mayor of Mikkeli is Mr. Timo Halonen and the Chairman of the City Board is Mrs. Pirjo Siiskonen.

73.6% of the population of Mikkeli have completed further education and 29.8% have a higher education degree. At the end of 2016, there were 22,500 jobs in the city with 21,700 people in the working population. 90% of the city’s workforce worked in Mikkeli. As a regional centre, Mikkeli also attracts workforce from the neighbouring municipalities, which in December 2018 had a total population of 24,600. The share of entrepreneurs in the workforce is 15%, which is one of the highest in the country.

Kuopio Water Cluster and BEM Mikkeli exhibiting at the Aquatech 2021

Kuopio Water Cluster (KWC), and Blue Economy Mikkeli (BEM), will join the Aquatech exhibition in Amsterdam, the Netherlands, on 2-5 November 2021.

Aquatech Amsterdam is the world’s leading water trade show for process, drinking and wastewater. “Taking part in the exhibition gives Kuopio Water Cluster and Blue Economy Mikkeli a unique opportunity to reconnect with water professionals from all over the world after a long period of remote and hybrid work”, said Panu Jouhkimo, Programme Coordinator at BEM.

During the 4-day event, we will connect with 18,000+ water experts and 650+ exhibiting companies. As a refreshing change after extended lockdowns, during fairs, there will be opportunities to join inspirational seminars and presentations, topical round tables, HUBs and pavilions, as well as Aquatech Innovation Award Show.

“Kuopio Water Cluster and Blue Economy Mikkeli respond to strong demand for Finnish water expertise and innovation, especially in the circular economy and digitalization” – said Patryk Wójtowicz, Research Manager responsible for internationalisation in KWC. Furthermore, by taking part in the Aquatech 2021, this unique interregional cooperation aims to build strong and diverse international partnerships.

Join us at booth 05.451

The Kuopio Water Cluster (KWC) concentrates Finnish water expertise providing product development, testing and commercialization services. Water Cluster aligns network of universities, and multi-disciplinary national research institutes focused on the water sector. KWC is a collaborative network for start-ups, SMEs and large companies to stimulate growth and innovation.

Blue Economy Mikkeli (BEM) is a part of an eco-industrial park combining the utilization of municipal and industrial material cycles with water circularity. Excellence in research, world-class RDI environments, and collaboration with companies create the conditions for the development, commercialization and business development of new solutions and services. State-of-the-Art MBR WWTP with full-scale testing and piloting environments for wastewater treatment and water reclamation make BEM a unique environment and collaboration network for business and RDI.


Panu Jouhkimo,
Programme Coordinator, Blue Economy Mikkeli Development Platform
Mikkeli Development Miksei Ltd
+358 44 598 6854

Patryk Wójtowicz,
Research Manager,
Kuopio Water Cluster
Savonia University of Applied Sciences
+358 44 785 55 64