Founded in 2004 and headquartered in Türkiye, YEO Technology currently executes global projects and investments across diverse sectors, ranging from advanced energy storage solutions and electrical grids to high-voltage substations, renewable energy power plants, and the energy transformation of industrial/commercial facilities and households, as well as hydrogen technologies.

To date, YEO Technology has reached over 400 projects across more than 40 countries on 4 continents. In doing so, the company not only undertakes its own energy investments and develops proprietary technology but also positions itself as a prime contractor for EPC (Engineering, Procurement, and Construction) and EPC-F (EPC + Financing), delivering turnkey industrial power plants for major investors.

By establishing a “Global Impact“ through projects that leave a lasting footprintworldwide, the company strives for a more sustainable world under the motto “It’s Possible.”

CALL Energy, the subsidiary managing YEO Technology’s renewable energy investments, holds a project development portfolio exceeding 1,500 MW across 10 countries on four continents. Focusing on the sourcing, development, and investment of renewable energy projects, CALL Energy manages projects end-to-end—from early-stage development and permitting to financing and commercialization.

Reap Battery, YEO Technology’s battery energy storage systems company, provides scalable, utility-scale storage solutions for grid-connected, hybrid, and renewable-integrated energy systems, supported by its production facility aiming for a 5 GWh capacity by the end of 2025.

Active in every link of the energy value chain—from smart grids to green hydrogen, and battery storage to digitalization—YEO Technology operates as a group that has established its own ecosystem in this field. Through its subsidiaries Ni-Cat, BrandIT, and ION Membran, the company supports the battery and hydrogen sectors with critical components and intelligent software solutions. Furthermore, YEO Technology, through its subsidiary Mikrohes, constructs eco-friendly hydroelectric power plants utilizing the Archimedes screw system, a technology dating back to the 3rd century BC.

As an umbrella organization encompassing energy investments, energy technologies, project development/EPC execution, and energy storage systems, YEO Technology continues to provide energy solutions that create sustainable value for its customers, business partners, investors, and the world.

CEO’s Perspective

“The energy transition is no longer just about technology; it is being empowered by global-scale financing and collaborations. As the global energy transition gains momentum, the strategic importance of the Dii Desert Energy Leadership Summit—which brings together key regional players and advances the clean energy agenda—continues to grow. Hosted in Istanbul, the 16th Dii Desert Energy Leadership Summit will create exceptional opportunities for international cooperation, highlighting Türkiye’s role as a regional energy bridge and Istanbul’s unique position connecting continents.

At YEO Technology, we have built an extensive platform spanning from Türkiye to over 40 countries across 4 continents, covering everything from energy storage and grid infrastructure to renewable generation, EPC, and financing. This year also marks a new milestone for us. The commencement of Battery Energy Storage Systems (BESS) production at our Reap Battery facility in Istanbul further strengthens the city’s position within the global clean energy value chain.

With our motto ‘It’s Possible,’ we will continue to work not just to produce energy, but to build the energy of the future today.”

Tolunay Yıldız Chairman of the Board & CEO, YEO Technology