Ampner Oy’s Power Engineering business unit continues strong growth. The wind power project expert participates in the implementation of Ilmatar Energy Oy’s power plant project in Alajärvi.

The Alajärvi wind farm in Southern Ostrobothnia, Finland, includes 36 wind turbines and two substations, Möksy and Louhukangas. With nominal power of approximately 220 MW the plant is expected to be completed during 2023.

Ampner has been involved in many ways already during the predesign and concept phases of the wind farm project, for instance by dimensioning the main components as well as carrying out electrical design and energy loss calculations. In January 2022 Ampner and Ilmatar signed an agreement of implementation phase where Ampner, in addition to earlier tasks, continues as a consultant in grid compliance. The agreement includes electrical planning design during the building phase, coordinating the protection settings and studies of sub-synchronous interaction.

Ampner’s CEO Tero Manner: “We are proud to able to continue co-operation with Ilmatar in one the most significant wind power projects in Finland. We are also pleased to note, that Ilmatar trusts our competence and we appreciate very much the opportunity to participate in Alajärvi project, already from the concept phase to the grid code compliance and commissioning.”

Petri Ainonen, Director, Construction, Ilmatar: ”Ampner has in our previous, mutual projects been able to meet our expectations, so it was natural to choose to continue the co-operation with them also in the Alajärvi wind power project. We value Ampner’s extensive experience in electrical engineering and their understanding of the Finnish grid code compliance.”

Additional information

Tero Manner, CEO, Ampner Oy

Tel. +358 45 663 9913,

Petri Ainonen, Director, Construction, Ilmatar Energy Oy

Tel. +358 40 847 3364,


Ampner provides products and services for connecting renewable energy sources to the grid. Ampner creates smart solutions for managing, testing and assuring the quality of a variety of renewable energy sources. The company designs, calculates and simulates electrical connections to the grid, whatever the energy source: wind, the sun, water, biomass or battery energy storage. The company also designs and manufactures string inverters capable of operating in demanding conditions in photovoltaic power plants and battery energy storage systems globally.

Ilmatar Energy Oy

Ilmatar is a Finnish energy company and an independent power producer, that focuses exclusively on renewable energy. Ilmatar was founded in 2011. Our operations range from greenfield development and construction management to operational asset management and retail sales of renewable energy as well as being a leading long-term PPA (power purchase agreement) provider in Finland. The wind farms of Ilmatar are built unsubsidised and Ilmatar owns the wind farms through their whole operational life. Ilmatar is owned by its founders, private investors, funds managed by Omnes capital, and the company’s management board.

Ilmatar Energy Group includes several project development companies and Ilmatar Service Oy, responsible for the technical and commercial management of our wind farms.  Ilmatar is founded in Finland and our headquarters are in Helsinki. Our other offices are in Oulu, Tampere, and Kuopio.