Nidec Conversion awarded the Hertz 1 project, the largest BESS project in Estonia
This battery energy storage system (BESS) project, will be installed in Kiisa, near Tallinn, Estonia.
With more than 50 units, totalling 100 MW of power and 200 MWh of capacity, it is the largest BESS project of the Baltic region and the first of its kind for Nidec Conversion in this area.
Nidec Conversion has been awarded this project by the joint venture company Baltic Storage Platform formed by Estonian energy company Evecon, French renewable energy developer Corsica Sole and Mirova, an affiliate of Natixis Investment Managers dedicated to sustainable investing.
This new contract further solidifies Nidec Conversion’s expertise and competitiveness in the BESS market.
Roche-la-Molière, 18 March 2025 – Nidec Conversion, a leading international provider of power conversion solutions for energy, mobility and the environment, has been awarded a landmark project in the Baltic region. Baltic Storage Platform, a joint venture between Estonian energy company Evecon, French renewable energy producer Corsica Sole, and Mirova, aims to build a large-scale battery storage facility in Estonia. This facility, representing 100 MW and 200 MWh, is set for delivery by the end of 2025.
The site and its substation, built by Connecto, will be connected to Estonia’s Transmission System Operator (Elering) via a 330 kV AC underground cable—an unprecedented infrastructure development in Estonia. This milestone will enhance grid stability and contribute to the country’s synchronization with the European grid.
As the largest BESS project in the Baltic States and Nidec’s first in the region, this initiative highlights the company’s leadership in addressing the growing demand for energy storage, which is essential to the global energy transition.
As the Engineering, Procurement, and Construction (EPC) contractor, Nidec Conversion will deliver a turnkey solution for Baltic Storage Platform. Nidec will oversee detailed engineering, civil and electrical works, equipment integration, software implementation, and commissioning. The 54 AC-box containers will be assembled at Nidec Conversion’s French plant in Roche-la-Molière, near Saint-Étienne, where the company integrates batteries and installs its in-house manufactured electric inverters.
With rapidly increasing operations in France, Nidec Conversion is expanding its facilities in the Saint-Étienne region through a €17 million investment to meet growing market demands.
Dominique Llonch, CEO of Nidec Conversion, states: “We are proud to work with our long-standing partner Corsica Sole on this new project, the largest in the Baltic States, which will contribute to address the challenges of supporting grid frequency services there. This also marks the start of new opportunities in the Baltic area for Nidec. Nidec is committed to supporting the energy transition worldwide to guarantee a more reliable and a cleaner future, and can rely for that on very skilled and dedicated teams, in France and around the world”.
Franck Girard, President of Nidec ASI SAS, states: “We are delighted to work with our long-standing partner Corsica Sole on this project, the largest in the Baltic States. The increasing proportion of renewable energies in the electricity mix presents grid frequency stability challenges. As a committed supporter of the Energy transition, Nidec Conversion has the opportunity to offer its expertise recognised worldwide for a more reliable and cleaner future. A first in the Baltic area for Nidec Conversion”.
Michael Coudyser, CEO of Corsica Sole, adds: “As a pioneer in energy storage, Corsica Sole is proud to contribute to the largest battery storage project in the Baltic States. This initiative reflects our commitment to accelerating Europe’s transition to a low-carbon energy system. Through strategic collaborations like this one with Nidec and our partners, we continue to deploy innovative storage solutions that enhance grid stability and support the integration of renewable energy on a large scale.”
Karl Kull, CEO of Evecon, adds: “Kiisa Battery Park will reinforce and stabilise the Estonian power grid by providing frequency reserve and smoothing out fluctuations. It has a noteworthy connection capacity and it will allow for rapidly and efficiently responding to any changes in the power grid once it commences operation in the autumn. Therefore, the solution supports the security of the supply of the entire region and allows for more efficient integration of various types of renewable energy sources. This is a historic moment for the entire Estonian energy sector, but also for our region with respect to synchronisation with the European grid.”
About Nidec Conversion
Nidec Conversion offers complete, customized electrical systems for energy efficiency in all fields. Its target markets are petrochemical, traditional and renewable energy, steel, marine and industrial automation. The multinational company specializes in heavy-duty applications with electric motors and generators up to 65 MW power (87,000 hp), electronic power converters and inverters, automation and software for industrial processes, and the retrofitting of power plants and hydroelectric generators. In addition, the company has strong know-how in the field of integrated systems for the production and storage of electrical energy (i.e. BESS) from renewable sources and their integration into electricity grids, as well as in the design and implementation of infrastructures for recharging electrical machines. Nidec Conversion is also able to offer optimized technologies for motor control and to develop automation solutions for specific applications, customized to the client’s needs.
About Corsica Sole
CORSICA SOLE is an independent solar power producer and a leader in energy storage in Europe. Growing rapidly, the company now has more than 125 MWp of photovoltaic power plants and more than 160 MWh of power plants with energy storage in operation, and is developing a project portfolio of more than of over 1.5 GW. It is also expanding into the production of renewable hydrogen. Specialist in island areas since 2009, Corsica Sole develops, builds, finances and operates its own projects in France and throughout Europe. Corsica Sole deploys its know-how to use renewable energies and technological innovation, to provide a relevant response to the energy transition and the fight against climate change. For more information, visit www.corsicasole.com.
About Evecon
Evecon is the leading private equity-based energy company in the Baltic States, developing an energy portfolio of more than 2,7 GW, which has so far focused on the development of wind, solar and energy storage parks. The numerous developments of Evecon include, for example, the largest solar farm in the Baltic countries and the biggest battery park in Continental Europe.
About Mirova
Mirova is a global asset management company dedicated to sustainable investing and an affiliate of Natixis Investment Managers. At the forefront of sustainable finance for over a decade, Mirova has been developing innovative investment solutions across all asset classes, aiming to combine long term value creation with positive environmental and social impact. Headquartered in Paris, Mirova offers a broad range of equity, fixed income, multi-asset, energy transition infrastructure, natural capital and private equity solutions designed for institutional investors, distribution platforms and retail investors in Europe, North America, and Asia-Pacific. Mirova has been active in the energy transition infrastructure sector for 20 years and has financed more than 1,000 projects for a total of over 7.3 GW of potential generation capacity across 48 countries. Mirova and its affiliates had €32 billion in assets under management, of which €4.2 billion for energy transition infrastructure investments as of December 31, 2024. Mirova is mission-driven company, labeled B Corp*.
*References to a ranking, award or label have no bearing on the future performance of any fund or manager.
Mirova Energy Transition 5 (MET5) is a French limited partnership (société de libre partenariat), closed to new subscription. Mirova is the management company. The supervisory authority approval is not required for this fund. The fund is exposed to capital loss risk, market risks, industrial and public counterparty risk, credit risk, liquidity risk, project risk, operational risk, compliance risk, legal and regulatory risk, financial risk, electricity transmission and distribution network risk, valuation risk, deal flow risk, sustainability risk. This fund benefits from support from the European Union under the InvestEU Fund.
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