Nelja Energia AS (also branded as 4Energia) is a

renewable energy Renewable energy (also called green energy) is energy made from renewable resource, renewable natural resources that are replenished on a human lifetime, human timescale. The most widely used renewable energy types are solar energy, wind pow ...

developer based in

Tallinn Tallinn is the capital city, capital and List of cities in Estonia, most populous city of Estonia. Situated on a Tallinn Bay, bay in north Estonia, on the shore of the Gulf of Finland of the Baltic Sea, it has a population of (as of 2025) and ...

Estonia Estonia, officially the Republic of Estonia, is a country in Northern Europe. It is bordered to the north by the Gulf of Finland across from Finland, to the west by the Baltic Sea across from Sweden, to the south by Latvia, and to the east by Ru ...

. The main areas of business of the company are the development of the renewable energy industry and the operation of power production. The name of the company, meaning Energy of Four, is referring to the four types of renewable energy:

wind Wind is the natural movement of atmosphere of Earth, air or other gases relative to a planetary surface, planet's surface. Winds occur on a range of scales, from thunderstorm flows lasting tens of minutes, to local breezes generated by heatin ...

water Water is an inorganic compound with the chemical formula . It is a transparent, tasteless, odorless, and Color of water, nearly colorless chemical substance. It is the main constituent of Earth's hydrosphere and the fluids of all known liv ...

biomass Biomass is a term used in several contexts: in the context of ecology it means living organisms, and in the context of bioenergy it means matter from recently living (but now dead) organisms. In the latter context, there are variations in how ...

and

solar Solar may refer to: Astronomy * Of or relating to the Sun ** Solar telescope, a special purpose telescope used to observe the Sun ** A device that utilizes solar energy (e.g. "solar panels") ** Solar calendar, a calendar whose dates indicate t ...

. The company is focused on the renewable energy development in the

Baltic countries The Baltic states or the Baltic countries is a geopolitical term encompassing Estonia, Latvia, and Lithuania. All three countries are members of NATO, the European Union, the Eurozone, and the OECD. The three sovereign states on the eastern co ...

. The CEO of the company is Aavo Kärmas. Nelja Energia owns and operates eleven

wind farms A wind farm, also called a wind park or wind power plant, is a group of wind turbines in the same location used to produce electricity. Wind farms vary in size from a small number of turbines to several hundred wind turbines covering an exten ...

in Estonia with the total capacity of 140.8 MW, and four wind farms in

Lithuania Lithuania, officially the Republic of Lithuania, is a country in the Baltic region of Europe. It is one of three Baltic states and lies on the eastern shore of the Baltic Sea, bordered by Latvia to the north, Belarus to the east and south, P ...

with the total capacity of 78.9 MW. In addition, the company operates two biogas-fuelled co-generation plants in Estonia. In

Latvia Latvia, officially the Republic of Latvia, is a country in the Baltic region of Northern Europe. It is one of the three Baltic states, along with Estonia to the north and Lithuania to the south. It borders Russia to the east and Belarus to t ...

, it owns and operates a cogeneration plant and pellet factory in

Brocēni Brocēni (; ) is a town in Saldus Municipality (2021–present), Saldus Municipality in the Courland region of Latvia. The town is situated along the river Ciecere, near lake Cieceres, which contains a large deposit of limestone that is used in t ...

. The company plans a 700–1,100 MW offshore wind farm off

Hiiumaa Hiiumaa ( , ) is the second largest island in Estonia and is part of the West Estonian archipelago, in the Baltic Sea. It has an area of 989 km2 and is 22 km from the Estonian mainland. Its largest town is Kärdla. It is located within ...

, Estonia. The company operates since 2005. It started as an operator company for the wind farms owned by Vardar Eurus, a company owned by Norwegian Vardar AS (90%) and the

Nordic Environment Finance Corporation The Nordic Investment Bank (NIB) is an international financial institution founded in 1975 by the five Nordic countries (Denmark, Finland, Iceland, Norway, and Sweden). In 2005, the three Baltic states (Estonia, Latvia, and Lithuania) also becam ...

(10%), and Freenergy, a company owned by Estonian investors and the

European Bank of Reconstruction and Development The European Bank for Reconstruction and Development, shortened to EBRD ( French: ''Banque européenne pour la reconstruction et le développement'' or ''BERD''), is an international financial institution founded in 1991 in Paris. As a multilate ...

, and it was owned equally by both companies. In 2012, Freenergy merged with Nelja Energia and the current ownership structure was adopted. The main shareholder of Nelja Energia was Vardar Eurus (77%). Estonian private investors owned 23% of the shares. On 29 May 2018, it was announced that

Enefit Green Enefit Green AS is a renewable energy company located in Tallinn, Estonia. It had gone public on Nasdaq Tallinn in October 2021 with 23 % of shares, but then reprivatized back in May–July 2025 up to complete control of the state-owned energy co ...

, a subsidiary of

Eesti Energia Eesti Energia AS is a public limited energy company in Estonia with its headquarters in Tallinn. It is the world's biggest oil shale to energy company. The company was founded in 1939. As of 2014, it operates in Estonia, Latvia, Lithuania, Fi ...

, will acquire 100% of Nelja Energia shares for €289 million. In addition, it will take over €204 million of Nelja Energia loans. The deal was approved and completed in November 2018.

References

{{Reflist Electric power companies of Estonia Wind power companies Biofuel producers Wind power in Estonia Estonian companies established in 2005 Companies based in Tallinn Energy companies established in 2005

See also

References