The global race to sustain AI’s energy appetite has turned into a contest of engineering breakthroughs. Years of overextended grid capacity and mounting data center demands have forced energy innovation to the forefront. That pressure is now translating into tangible results.
Massachusetts-based VEIR, backed by Microsoft’s Climate Innovation Fund, reached a key milestone this week. Its superconducting cable system successfully transmitted 3 megawatts of power through a single low-voltage line during a live demonstration near its Woburn headquarters. The startup recently closed a $75 million Series B round to accelerate commercialization, signaling confidence that AI-scale infrastructure may finally be catching up to AI-scale ambition.
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Technical milestone
VEIR’s system, called Superconducting Technology for AI Racks (STAR), uses superconducting tapes cooled by liquid nitrogen to carry electricity without resistance. During the demo, the STAR cable delivered continuous power with no measurable energy loss, a feat conventional copper or aluminum lines cannot match. In efficiency terms, just one megawatt can power up to a thousand homes. The company’s engineers expect their design to move ten times more power through cables twenty times smaller than current high-voltage setups.
Structural limits
Traditional data centers depend on bulky cabling and high-voltage conversions that waste energy as heat. Each additional cooling or safety system compounds cost and space constraints. VEIR’s compact, low-voltage configuration aims to eliminate those bottlenecks, allowing denser rack arrangements and longer power routing without additional substation upgrades. The demonstration suggests a future where grid delivery and compute scaling advance together instead of at odds.
Industry positioning
CEO Tim Heidel described power access as “the single biggest constraint for AI and data center growth.” His framing aligns with broader market trends. OpenAI’s and Meta’s facilities alone account for an estimated 13 gigawatts of upcoming load capacity, far beyond what regional grids were designed to support. As companies experiment with nuclear sourcing and on-site generation, superconducting infrastructure offers a path that scales within existing networks rather than outside them.
Commercial path
Beyond AI, VEIR’s technology could improve efficiency across utilities and renewable transmission lines. Microsoft’s Brandon Middaugh called it a “critical enabler for delivering carbon-free electricity at scale,” reflecting how large investors now view energy innovation as core to AI competitiveness. The next step will involve validating STAR systems under real operating loads, a stage that will determine whether superconducting cables can transition from demonstration to deployment in 2026.
Market outlook
If the performance metrics hold, data center design will shift toward modular, high-density layouts with dramatically lower energy loss. That change would influence not only AI operators but also national grid planning and corporate sustainability targets. The current moment resembles early semiconductor scaling, where each efficiency gain expanded what the market could imagine building next.
AI’s growth is now inseparable from the power lines that feed it. VEIR’s demonstration converts a theoretical solution into a working prototype, suggesting the next wave of AI infrastructure will depend as much on cryogenics as on chips. The test marks progress toward an industry where energy delivery evolves at the same pace as computation.
Reference
Gil, B. (2025, November 12). Microsoft-backed startup hits a milestone in the race to power AI. Gizmodo. https://gizmodo.com/microsoft-backed-startup-hits-a-milestone-in-the-race-to-power-ai-2000684401
