FREEN OÜ (founded 2018, Kohtla‑Järve, Estonia) makes small vertical and horizontal wind turbines and modular sodium‑ion and LiFePO4 battery systems for homes, farms, commercial sites and microgrids, sold direct and via distributor partners.
FREEN OÜ, founded in 2018 and headquartered in Kohtla‑Järve, Estonia, designs and manufactures small wind turbines and modular battery energy storage systems. The company develops vertical‑ and horizontal‑axis turbines plus sodium‑ion and LiFePO4 battery packs for homes, farms, commercial sites and microgrids. FREEN’s mission is to make sustainable energy accessible and affordable by combining local generation and storage for resilient, behind‑the‑meter power. It offers product sales, turnkey system integration, and grant support to accelerate distributed renewable deployments.
FREEN develops vertical‑axis and horizontal‑axis turbine designs with in‑house metalworking and assembly, and modular BESS based on sodium‑ion and LiFePO4 chemistries. Sodium‑ion packs use abundant sodium and noncritical materials, targeting high cycle life (>4,000 cycles), ~90% DoD, broad temperature operation, and integrated BMS for cell balancing and protection. LiFePO4 systems provide thermal stability and long calendar life. Systems support hybrid integration with solar PV and common commercial inverters and are manufactured in Estonia with modular scalability for residential to commercial capacities.
Product lines include vertical‑axis turbines (Freen‑9, Freen‑20, Freen‑6 upcoming) and horizontal‑axis models, plus modular sodium‑ion (BSH/BSL) and LiFePO4 battery packs. Modules range from ~7.5–15 kWh and scale to larger arrays with integrated BMS. Offerings support hybrid wind+solar installations and target residential, agricultural, commercial, telecom, public infrastructure and microgrid use cases.
In 2025 FREEN advanced commercialization of the Freen‑6 vertical‑axis turbine and expanded production capacity at its Kohtla‑Järve plant. Expansion was supported by roughly €36.4 million in private commitments and €2.6 million in public grants from the EU Just Transition Fund and Ida‑Viru Entrepreneurship Investments, increasing metalworking and BESS assembly throughput and enabling contract manufacturing for other European wind suppliers.
Shareholders include Valerii Nebesnyi (~20.35%) and corporate entities MAKSICORE HOLDING LTD (~18.93%), BIH INVESTMENTS LTD (~15.11%), MEXERGY HOLDING LTD and KVV WINDEST LTD. A pool of private investors has committed approximately €36.4 million to wind energy expansion; public non‑equity support of about €2.6 million supplements funding for manufacturing scale‑up and product development.
