IN Brief:
- Skeleton Technologies has secured a €33m first close in a larger pre-IPO funding round.
- Total venture capital funding now stands at €392m as the company prepares for a planned US IPO in 2027.
- The funding supports high-power energy storage for AI data centres, grid power systems, and manufacturing expansion.
Skeleton Technologies has secured a €33m first close in a larger pre-IPO funding round, taking its total venture capital funding to €392m.
The round forms part of the company’s preparations for a planned initial public offering in the United States in 2027. The first close adds Axon Partners Group, SmartCap, and Taiwania Capital to Skeleton’s investor base, with further investors expected as the wider round progresses.
Skeleton develops high-power energy storage systems for grid and AI infrastructure applications. The company operates mass-scale supercapacitor manufacturing in Germany and is developing a 1GW SuperBattery factory in Finland. It is also preparing to expand production into the United States.
The funding is directed at power infrastructure constraints around AI data centres, where electricity availability, grid connection capacity, and power quality are becoming limiting factors for expansion. AI workloads are increasing demand for high-density computing sites, and those sites place concentrated electrical loads on transmission and distribution networks.
Skeleton’s technology portfolio is based around supercapacitors and its Curved Graphene material, a synthetic carbide-derived material used to improve supercapacitor energy density. The company opened a €220m SuperFactory in Markranstädt, near Leipzig, in December, strengthening its European manufacturing base for high-power storage products.
The company has also been developing grid stabilisation applications. In February, it signed a strategic memorandum with Hyosung Heavy Industries and Marubeni Corporation covering South Korea’s first domestically produced next-generation e-STATCOM system, with commercialisation targeted for 2027. The arrangement integrates Skeleton’s supercapacitor-based high-voltage rack into Hyosung’s static synchronous compensator platform.
Data centre power constraints are becoming visible across European grid planning. Energinet has paused new Danish grid connection agreements after large-scale demand requests, including data centres, outpaced near-term network capacity. ENTSO-E has also examined data centres as both major loads and potential flexibility assets within the European power system.
High-power storage serves a different role from long-duration energy storage. Supercapacitors and related systems are built for rapid charge and discharge, power quality support, voltage stability, and short-duration response. That makes them suited to applications where the problem is not only the volume of energy stored, but the speed, stability, and repeatability of power delivery.
AI data centres combine high capacity requirements with low tolerance for interruption. Their electrical systems include UPS infrastructure, backup generation, grid connection equipment, on-site storage, power conversion systems, cooling infrastructure, and monitoring platforms. As compute density rises, the pressure on upstream networks and site-level electrical design increases.
Data centre power is moving into the same infrastructure category as grid reinforcement, storage, and power electronics. Annual electricity procurement is only one part of the problem. Developers also need capacity at the right network node, a deliverable connection timetable, stable power quality, and on-site systems that can support resilience without weakening wider grid operation.
European manufacturing capacity also sits within the same supply chain. Grid stabilisation equipment, storage systems, power electronics, and advanced materials are becoming strategic industrial technologies. Skeleton’s German supercapacitor production and Finnish SuperBattery plans give it a European manufacturing base at a point when demand for power infrastructure equipment is rising from AI, electrification, and grid modernisation.
The €33m first close gives Skeleton additional capital for a market where power delivery is increasingly connected to digital infrastructure growth. Data centre expansion now depends on grid capacity, storage performance, and electrical systems capable of responding at high speed under demanding operating conditions.