Skip To Main Content

Energy storage

Skeleton

Skeleton’s SkelCap ultracapacitor series is unique in the world of ultracapacitors

Skeleton

Commercialised by

Skeleton

Tallinn, Estonia

Sepise 7, 11415 Tallinn, Estonia

Sustainable developement goals
SDG 07SDG 08SDG 09SDG 11SDG 12SDG 13

Next-generation supercapacitors for energy storage

To meet the surging energy demands of AI, Skeleton’s patented Curved Graphene technology delivers the highest energy and power density for supercapacitors and high-power batteries. Produced at its pilot plant in Bitterfeld-Wolfen, Germany, Curved Graphene powers AI peak shaving, grid-scale energy storage, and EV boardnets with unmatched efficiency. Skeleton’s E-statcom system enhances grid stability, offering 2× higher power density and 50% fewer power losses. This technology enables up to 40% more computing power, 33% energy savings, and 40% less power connection need—making it essential for future AI infrastructure. Skeleton is ready to scale—delivering smarter, cleaner, and more resilient energy.

Visit site

The need

Skeleton Technologies is a global leader in high-power, fast-charging energy storage for AI data centres, grid stability, mobility, and industry. Our mission is to help companies cut CO₂ emissions and save energy through our supercapacitor and SuperBattery solutions.

The solution

Skeleton’s high-power storage solutions offer ultra-fast charge/discharge, high-power density, and long cycle life. In data centres, we enable microsecond-level peak shaving and GPU power smoothing. On the grid, we support frequency regulation, voltage stabilisation, and renewables integration, delivering unmatched reliability and responsiveness.

The value proposition

  • Ultra-fast response (<1 ms) for AI surges, load spikes, and micro-outages.
  • High power density enables peak shaving and sub-second load balancing.
  • Over 1M cycles with no thermal runaway.
  • Modular design integrates at rack, row, or grid level.
  • Reduces TCO through durability and efficiency.
  • Supports FFR, voltage stabilisation, and renewables.
  • Safe in high-temperature, high-vibration environments.

Related news

From bottlenecks to breakthroughs: how Skeleton is powering the next industrial era

Insights Jun 5, 2025

Skeleton’s GrapheneGPU Powers More Efficient, Greener AI Data Centres

News May 30, 2025
Data Center

EVENT: DECARBONISING DATA CENTERS

Events

Capturing Europe’s Clean Tech Opportunity: Now is the moment to lead

Insights Apr 8, 2025

Decarbonising data centers: Innovation and Energy Efficiency

Events

Three InnoEnergy portfolio companies recognised by TIME as the world’s top greentech companies of 2025 

News Mar 31, 2025

Skeleton Technologies expands R&D capabilities with new unit in Finland

News Nov 13, 2024

Skeleton’s graphene-based ultracapacitors boost double and single decker-buses through low emission zones

News Jan 17, 2023

EIT InnoEnergy supported Skeleton to build Siemens-designed supercapacitor factory in Germany

News Sep 13, 2022

Skeleton goes after the Polish market and announces agreement with ZPUE for sustainable energy solutions

News May 12, 2022

Skeleton Technologies and H2 Green Steel listed on 2022 Global Cleantech 100

News Jan 17, 2022

Skeleton Technologies receives an additional €51 million funding to scale up ultracapacitors production

News Mar 15, 2021

Skeleton Technologies raises €41.3 million in equity round from top European entrepreneurs

News Nov 6, 2020

Skeleton Technologies launches UL-certified ultracapacitors for warehouse robotics and smart factories

News Nov 29, 2019

Skeleton’s ultracapacitors to power Škoda trams in Mannheim

News Aug 23, 2019

Interested? Contact us