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Our history
of success

It took us almost 10 years to reach this current point. Our tremendous journey has been full of trial and error, continuous R&D, rigorous testing of new hypotheses, application of innovative materials, and non-stop invention — all to finally succeed in creating Darrieus wind turbines with industry-leading energy conversion efficiency, a low cost of ownership, and outstanding applicability to all kinds of usage scenarios.

The first commercial vertical wind turbines, based on Georges Darrieus’ invention, were deployed in the United States back in the 1980s. 30 years later, Valerii Nebesnyi, the founder of ANEM and a serial inventor, revolutionized the original concept paving the way, to the emergence of a patented technology for building turbines that are considerably lighter than both traditional propeller-type turbines and the rigid vertical-axis Darrieus turbines.

Key milestones



George Darrieus patents the vertical-axis wind turbine.



Commercial use of large vertical wind turbines begins.



ANEM's founder introduces a new disruptive concept.



Patent received, prototyping of the FREEN large-size wind turbine begins.



Freen is established in Estonia, finalizing the R&D phase of the vertical wind turbine.



Start of the factory construction and initiation of investment rounds.



The company secures
EUR 36.4 million in funding, purchases and installs manufacturing equipment.



Official launch of our production lines and entry into the international market.



Expansion of the Freen product portfolio and services.

Today, our family of small wind turbines — based on our proprietary designs and patented technical solutions — offers consumers and energy operators worldwide a great opportunity to start reaping the benefits of renewable energy without making million-dollar investments.


Our facility

Our production facility is strategically located on the shore of the Gulf of Finland, in close proximity to major European highways, ports, and railway hubs, which dramatically facilitates logistics and enables us to ship our products worldwide without delays.

This modern factory has a combined area of over 25,000 square meters and is designed for the mass production of small wind turbines (4,000 units yearly with potential for a higher output).

In addition, our wide range of modern CNC equipment in combination with our technical expertise enable us to manufacture high-quality, complex metal assemblies and turbine components

End-to-end quality control is achieved through a well established multi-tier QA process and a corporate ERP system that logs the results of each production stage. Precision-sensitive components are additionally checked using the ZEISS Contura machine.

Our production processes are
EN 1090-1
ISO 9001:2015
ISO 3834-2

Our mission

Our company’s mission is to make small wind energy affordable and accessible to consumers in every corner of the world, including the most remote locations without a regular or reliable power supply. To that end, our R&D team works tirelessly to improve our current turbine designs and come up with new features, materials, and components to stay ahead of the curve and follow the chosen path of continuous improvement.


We are committed to excellence in every aspect of our business, from the design and production of cutting-edge wind turbines to exceptional customer service and strong partnerships worldwide. With our unwavering dedication to sustainability, we strive to empower individuals and businesses to harness the power of wind energy, reducing their carbon footprint and contributing to a greener future. Through continuous research, development, and collaboration, we are making wind energy accessible and efficient for consumers and partners across the globe.

Andrey Khimenkov, CEO

Project funding

Freen OÜ is backed by a considerable pool of private investors who have already committed EUR 36.4 million to our wind energy project. In addition, we actively apply to relevant green energy programs and have succeeded in securing additional funding from various European renewable energy initiatives.

For example, we have received substantial financial support under the Ida-Viru Entrepreneurship Investments grant of EUR 2.6 million from the EAS-administered Just Transition Fund, to bolster our production capacity and generate new employment opportunities.

The company’s initiative comprised construction of an extension to our existing factory and procurement of additional manufacturing equipment. The overarching objective was to diversify the Freen’s business pursuits by enabling the company to manufacture our patented wind turbines and offer our metal processing capabilities to other European wind turbine manufacturers.

This initiative entailed acquisition of essential metal processing machinery and expansion of the existing production facility. A number of high-value jobs were created in the area as a result of this undertaking.

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Our achievements

As a proud member of the WindEurope association and recipient of numerous grants from the European Union’s green initiatives, we are committed to expanding our market exposure through partnerships, media, and participation in relevant industrial events, such as the WindEurope Annual Event 2024 in Bilbao, Spain.

General Advisor

The IOPARA company is a General Advisor of Freen OÜ in the field of wind turbine research and calculations (including performance studies, characteristics improvement, and wind field certification). The company is represented by Ion Paraschivoiu, its Founder and CEO who has a PhD in energy science and has a recognized status of professor at Polytechnique Montréal School, Canada.

Patent Information

Wind generators of Freen OÜ use a highly efficient design of a wind turbine wing — the Darrieus type. Freen OÜ made a licensing agreement with the A.N.E.M. (Alternative Energy and Manufacturing Ltd) company on the use of the wind generator wing property rights (the “Horizontal Axis Troposkein Tensioned Blade Fluid Turbine” patent registered in the USA, No. USOO9441615B1).

Strategic Partner

The Ida-Viru County Industrial Areas Development Foundation state-owned company (IVIA.ee) is a Strategic Partner of Freen OÜ in cooperation with the Estonian Government for the implementation of plans to build a wind generator manufacturing plant and create wind fields.


Sunsa appreciates Freen for their innovative technological solutions in creating hybrid renewable energy parksutilizing small wind generators. The advanced technologies offered by Freen give a competitive edge, and partnering with Freen creates fresh opportunities to contribute to the development of a sustainable future.

Gregory Levkovets, CEO at Sunsa OÜ