Estonia’s Skeleton Technologies and Hyosung are building Korea’s first next‑gen grid stabilizer — keeping power steady as AI and renewables grow.
Fueled by the AI boom, the world is scrambling for more efficient, modern cleantech solutions. Estonian engendering is here to help. This week, Tallinn-based energy storage innovator Skeleton Technologies has signed a strategic agreement with South Korea’s Hyosung Heavy Industries to develop Korea’s first domestically produced e-STATCOM grid stabilization solution, targeting commercialization in 2027. The MoU signing was announced in an official press-release.
The partnership, which also includes Japanese trading conglomerate Marubeni Corporation, addresses one of the most pressing challenges in modern power grids: maintaining stability as renewable energy and AI data centres create unprecedented volatility in electricity supply and demand.
What’s e-STATCOM grid technology
Traditional power grids were designed for predictable, steady generation from coal and nuclear plants. But as solar and wind power fluctuate with weather conditions, and AI data centres create massive, sudden power draws, grids are increasingly stressed. When renewable generation drops sharply or data centres spike demand, grid frequency can destabilize — potentially causing blackouts.
e-STATCOM (enhanced Static Synchronous Compensator) solves this by combining reactive power compensation with active power injection. Skeleton’s supercapacitor-based high-voltage racks can discharge energy in milliseconds, providing “virtual inertia” that mimics the stabilizing effect of traditional spinning generators.
Unlike batteries, supercapacitors can charge and discharge hundreds of thousands of times without degradation, making them ideal for the rapid cycling required in grid stabilization applications.
The announcement comes as Hyosung Group Chairman Cho Hyun-joon declared that global power markets are entering a “super-cycle” driven by the convergence of AI and renewable energy. South Korea, home to major semiconductor manufacturers and data center operators, faces acute grid modernization needs as it transitions away from fossil fuels while supporting the explosive growth of AI infrastructure.
Marubeni, one of Japan’s biggest trade houses, will act as a strategic partner and Asia-Pacific distributor, creating even more export potential in the future.
Skeleton’s grid track record
This isn’t Skeleton’s first rodeo in grid applications. The Estonian company — believed to be the next local unicorn — has previously deployed supercapacitor systems in Germany’s grid stability projects and has established itself as a leader in high-power energy storage for applications ranging from mining equipment to electric buses.
Are you interested in trading with Estonia? Enterprise Estonia is providing sourcing services for foreign enterprises. Contact Estonian export advisors or use our free e-consulting service to start trade with Estonia.
