Siemens leads late-stage round in supercapacitor maker Skeleton Technologies
What's the deal? Siemens has led a late-stage investment in Skeleton Technologies, an energy storage company that builds supercapacitors to manage power spikes in data centers. The deal, announced in October 2026, pairs the investment with an exclusive partnership between the two firms.
Why now? "The race to scale AI is increasingly becoming a race for power," said Peter Koerte, member of the managing board of Siemens AG and president of Smart Infrastructure. Data center operators face long waits for new grid and facility infrastructure, and supercapacitors help smooth demand without that delay.
What's the endgame? Siemens is adding supercapacitor technology to its electrical infrastructure portfolio, which already serves nine of the top ten global data center providers. Skeleton aims higher still: CEO and co-founder Taavi Madiberk said it plans "to become the world's largest provider of white-space power systems for AI data centers."
The two companies are not new partners. Siemens has backed Skeleton as a technology partner since 2022 and as an investor since 2023, making this round a deepening of an existing relationship rather than a fresh bet.
What could go wrong? The transactions still depend on customary completion formalities. The companies did not disclose the round size or Skeleton's valuation, leaving the scale of the commitment unclear.
The signal: Power, not chips, is becoming the bottleneck for AI growth. By tying its electrical infrastructure business to a supercapacitor specialist, Siemens is positioning itself at the point where energy supply meets compute demand — a chokepoint that is reshaping where data center money flows.
Read more: press.siemens.com
Image credit: Estonian Foreign Ministry
