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The Hallanvahti project is 100% owned by the Taaleri SolarWind III fund, managed by Taaleri Energia, a Finnish-based wind, solar and battery energy storage developer and fund manager.

129MWp PV solar park is an impressive renewable energy project situated approximately 6.5 kilometers from Joroinen in east-central Finland. Spanning around 200 hectares of wet peatland with a lightly dense forest, the site features a thick layer of peat, ranging from 500mm to 7000mm in depth. Beneath this peat layer, geotechnical surveys have identified silt, marine silt, and bedrock. The water table consistently remains around 500mm from the top of the peat layer, with a steady flow from external reservoirs. The project’s goal is to preserve the peat layer throughout its construction and lifecycle while effectively managing the water flow.

This solar park is equipped with over 206,000 solar panels on an east/west tracking system, making it the largest of its kind currently under construction in Finland. It is expected to generate between 130 and 145 GWh of electricity annually, sufficient to power thousands of homes and businesses. Over its projected 40-year lifespan, the park will produce a total of 5,200 to 5,800 GWh of clean energy. The plant would supply energy to nearly 300,000 single-family homes or nearly 1.5 million apartment buildings. With the energy produced by the project, it would also be possible to drive an electric car for up to 25 billion kilometres.

Extensive environmental, soil, and hydrological investigations have been conducted to ensure the sustainability and efficiency of the site. The project has been in development for the past two years, driven by the collaborative efforts of Etec Automation Oy and 3Flash Finland Oy. As part of the project process, Etec Automation Oy and 3Flash Finland Oy worked with Pelastakaa Sysmäjärvi ry, Joroinen municipality, and Pohjois-Savo ELY Centre on a locally important water protection project, aiming to significantly improve the water quality of Sysmäjärvi in the long term.

When realised, the project will be a significant employer, creating up to 290 person-years of work with annual maintenance work for at least 30 years.