Skeleton technologies

Power systems for
AI infrastructure

The only provider of full power systems from the IT rack to the electrical grid: CBU and BBU sidecars, double-conversion UPS, and power support for Solid-State Transformers

Why Skeleton

Stabilizing AI infrastructure from microseconds to minutes with intelligent power systems

10 µs Dynamic Response Time

Achieved only by Skeleton, Bypassing the 20µs speed required for GPUs peak shaving.

45% More Energy Efficiency

By eliminating the need for artificial compute loads, reducing heat and increasing efficiency.

High quality at scale

Dedicated engineering teams for AI data center power systems with integrated hardware & software capabilities.

Products

Full value chain engineering and production

The largest power systems engineering team in the AI data center industry.

High-Density AI Data Center UPS GrapheneUPS Double-conversion UPS built for AI infrastructure UPS Density 242 kW/m² Footprint 50% smaller than comparable UPS systems Show details Hide details

Peak Shaving Capacitor Shelf (PCS) GrapheneGPU AI Peak Load Shaving Dynamic Reaction Speed 10 µs Voltage 48-54V & 800V Show details Hide details

800 VDC Battery Backup Unit (BBU) GrapheneBBU Backup Power for Data Centers Backup duration Up to 90 seconds Nominal Output Voltage 800V Show details Hide details

High-Power Grid Energy Storage SkelGrid Grid-Scale Systems Max power (1s) 1132 kW - 2830 kW Max current (1s) 1400A - 2500A Show details Hide details

Customers' Quotes

What Others
Are Saying About Us

Skeleton Technologies brings the necessary quality mindset to critical applications. The highest power density and efficiency in the industry provides us with a very clear competitive advantage"

Stanislav Vizur

Strategic Purchasing

Choosing to work with the best ultracapacitor manufacturer on the market was easy. Not only is their technology best suited for our marine and offshore applications but they care deeply about establishing long-lasting relationships with support to us and our clients"

Paul Cairns

Managing Director

Skeleton Technologies’ ultracapacitors provide a major fuel saving and will reduce maintenance with a long lifetime. It is also a “Plug & Play” solution adding safety and reliability to the vehicles"

Mark Nodder

Former Chairman & CEO

We have tested all the leading suppliers on the market and are convinced that Skeleton Technologies has by far the best offer. The lowest internal resistance (ESR) and highest efficiency levels of Skeleton’s ultracapacitors lets us explore new solutions that were not thinkable with other products."

Valter Arosio

CEO, DIMAC RED S.p.A.

solutions

High-power
solutions designed to
fit your unique
requirements.

Data Centers

Grid Stability

Defense

See all  solutions

Skeleton Locations

Made in Europe, Delivered Globally

Leipzig Superfactory, Germany

World's Largest Supercapacitor Production Facility

Varkaus, Finland

SuperBattery Factory

Bitterfeld-Wolfen, Germany

Curved Graphene Synthesis and Production

Tallinn, Estonia

Module and Systems Development

Lappeenranta, Finland

AI Data center Infrastructure & Power Systems Development

technology

Unique Product Roadmap, Supported by the Largest Largest Power Systems R&D Team in the AI Industry

Sustainable Raw Materials

Free from cobalt, nickel, and copper

Robust & Safe

Safe even when pierced, crushed, or overheated, due to no lithiated graphite or lithium plating.

Curved Graphene

Skeleton's proprietary material allowing unmatched low internal resistance and high capacitance

Learn More

Talk to us

Contact Us

Discuss your unique power systems requirements.

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blog & news

Skeleton Blog & News

We're committed to making a positive impact on our planet — not just today but every day.

Explore More

Skeleton Technologies secures strategic investment led by Siemens to expand US manufacturing

SAN JOSE, Calif., Oct. 14, 2026 – Skeleton Technologies, a global leader in high-power systems for AI infrastructure, today announced a strategic investment from Siemens, bringing Skeleton’s valuation to more than $1 billion. The...

Skeleton Team , October 14th, 2026

Infineon and Skeleton collaborate on solid-state transformers and sidecars for AI power to enhance AI data center resilience

Infineon Technologies AG (FSE: IFX / OTCQX: IFNNY) and Skeleton Technologies have signed a Memorandum of Understanding (MoU) to collaborate on high-efficiency, resilient power solutions for modern...

Skeleton Team

Skeleton Technologies Joins the Finnish American Chamber of Commerce New York as U.S. Operations Expand

Skeleton Technologies has joined the Finnish American Chamber of Commerce New York (FACC-NY). Skeleton provides hyperscalers and data center operators with intelligent power systems that manage rapid...

Skeleton Team

DG Matrix and Skeleton Technologies Join Forces to Deliver Resilient, Fast-Response Power for 800 VDC AI Data Centers

Collaboration brings together Skeleton’s peak-shaving and backup power systems alongside DG Matrix Interport™ solid-state transformer technology for next-generation AI data center deployments DG...

Skeleton Team

faqs

Frequently Asked Questions

What are supercapacitors? How do they work?

A supercapacitor is an energy storage medium, just like a battery. The difference is that a supercapacitor stores energy in an electric field, whereas a battery uses a chemical reaction. Supercapacitors have many advantages over batteries, such as safety, long lifetime, higher power, and temperature tolerance, but their energy density is lower compared to batteries. Learn more.

What are SuperBatteries?

Skeleton’s SuperBattery technology is a fast-charging, high-power battery technology that fills the gap between supercapacitors and batteries. SuperBatteries offer the ideal combination of energy, power, and safety for applications under 30 minutes.

What's the Difference between an Ultracapacitor and a Supercapacitor?

The short answer is that there is no difference in how the words are used today. To learn more about the history of these terms, read our blog post “What’s the Difference between and Ultracapacitor and a Supercapacitor?”.

Can supercapacitors replace batteries?

Supercapacitors and batteries serve different purposes. Supercapacitors excel in short-term applications (typically a few seconds of power) and have a longer lifespan, higher reliability, and efficiency in extreme temperatures. Batteries are more economical for long-term energy needs. See our infographic explaining the differences to help you choose the right energy storage technology.

What is ESR and why is it important?

ESR (Equivalent Series Resistance) measures the internal resistance of a supercapacitor, and it's crucial as it affects efficiency, heat generation, and voltage drop. Lower ESR means higher efficiency, less heat, and better performance, especially in high-frequency applications. The lower the ESR of a supercapacitor, the better the performance.

How do supercapacitors perform in extreme temperatures?

Supercapacitors operate normally and maintain efficiency from -40 °C to +65 °C (-40 °F to 149 °F), with minimal to no effect on performance. However, high temperatures do reduce the lifetime of a supercapacitor cell, module, or system.

Power systems for
AI infrastructure