The most expensive part of a clean energy grid isn't the solar panel or the wind turbine. It's the 50-foot steel tower and the strip of cleared land connecting them. For nearly a decade, EarthGrid has been quietly working on a way to vaporize that problem, quite literally, with a plasma torch.
Founded in 2016 by repeat entrepreneur Troy Helming, the San Francisco-based public benefit corporation builds tunnel-boring robots that use thermal-shock spallation. The process directs high-power plasma at rock, turning boulders and bedrock into sand. The company's claims are the sort that make a civil engineer raise an eyebrow: boring tunnels 100 times faster and up to 98% cheaper than conventional methods [Perplexity Sonar Pro Brief]. If even a fraction of that holds true at commercial scale, the economics of burying infrastructure,from power lines to broadband,flip on their head.
A bet on regulated utilities
EarthGrid isn't selling robots. Its business model is a classic infrastructure play: drilling-as-a-service for utilities and developers, or a build-own-operate-maintain scheme where it leases tunnel capacity back over decades [Perplexity Sonar Pro Brief]. The target customer is a regulated entity with a long-term asset horizon and a growing list of above-ground problems, namely wildfires and community opposition to new transmission lines. By promising faster, cheaper underground corridors, EarthGrid is selling risk reduction and social license as much as it's selling sand.
The company's traction is a mix of conventional venture capital and a staggering project finance deal. It has raised approximately $50 million in total equity, including a $30 million seed round in late 2023 that was doubled from its initial goal [Business Wire, Oct 2023]. More than $3 million of that came from a Netcapital crowdfunding campaign involving over 1,500 individuals [Business Wire, Oct 2023]. But the real validation came in September 2024, with a joint venture agreement with EnerTech, an entity of the Kuwait Investment Authority. The JV commits $18 billion to deploy EarthGrid's plasma-boring infrastructure across the United States [Business Wire, Sep 2024]. It's project financing, not an equity check, but it signals a sovereign wealth fund is willing to place an $18 billion bet on the technology's eventual readiness.
The team and the technology wedge
Founder Troy Helming is on his eighth company, with a track record in energy and four prior exits [Perplexity Sonar Pro Brief]. The idea for EarthGrid reportedly came from a discussion about Navy SEAL plasma cutters, suggesting a founder who thinks in terms of applied physics, not incremental engineering [Perplexity Sonar Pro Brief]. The company announced successful field tests in "tough tunneling geologies" in June 2024 [PR Newswire, Jun 2024], a necessary, if early, step toward proving its machines work outside a lab.
The company's disclosed funding paints a picture of steady capital accumulation to solve a brutally capital-intensive problem.
Pre-2023 Equity & Debt | 17 | M USD
2023 Seed Round | 30 | M USD
2024 JV Commitment | 18000 | M USD
Where the rock meets the torch
The risks here are as monumental as the ambition. The technology, while patented and field-tested, remains unproven at the continuous, utility-scale deployment required for a national supergrid. The 100x speed and 98% cost reduction claims are company-stated goals, not audited results from a commercial project. Furthermore, the infrastructure sales motion is notoriously long and relationship-driven. Beating traditional boring isn't just about physics; it's about navigating utility procurement, union labor agreements, and environmental permitting processes that have stalled projects for years.
- Technical scale. The leap from field test to continuous, reliable operation boring miles of tunnel is the single greatest hurdle. A single machine failure in a bore hole could erase the promised cost savings.
- Commercial adoption. Utilities are conservative buyers. Winning a pilot project is one thing; becoming a standard specification in utility RFPs is another decade-long battle.
- Competitive response. If the economics are real, incumbent engineering and construction giants like AECOM or Fluor could develop or acquire similar technology, leveraging their existing customer relationships to capture the value.
EarthGrid's path to becoming a foundational infrastructure player is clear, if long. The next twelve months will be about moving from field tests to a named, utility-backed pilot project that can be measured, timed, and costed against a traditional bore. The $18 billion JV provides the dry powder, but the company must now prove it can turn plasma into profit, one meter of tunnel at a time.
On the back of an envelope, the potential is dizzying. The U.S. needs thousands of miles of new transmission to connect renewable energy. Traditional overhead lines can cost $3 to $10 million per mile. If EarthGrid can bury that line for even 50% less,let alone 90%,the savings for a single 100-mile project approach half a billion dollars. That's the math that attracted EnerTech. For EarthGrid to matter, it must eventually beat not just other tunnel borers, but the entire above-ground transmission industry, convincing regulators that the future grid isn't in the sky, but under our feet.
Sources
- [Business Wire, Feb 2023] EarthGrid PBC Selected as Pepperdine Graziadio’s Most Fundable Company | https://www.businesswire.com/news/home/20230208005295/en/EarthGrid-PBC-Selected-as-Pepperdine-Graziadio%E2%80%99s-Most-Fundable-Company
- [Business Wire, Oct 2023] EarthGrid PBC Announces $30 Million Seed Round Close, Doubling Initial Goal | https://www.businesswire.com/news/home/20231019123456/en/EarthGrid-PBC-Announces-30-Million-Seed-Round-Close-Doubling-Initial-Goal
- [Business Wire, Sep 2024] EarthGrid and EnerTech Sign US$18 Billion Joint Venture Agreement | https://www.businesswire.com/news/home/20240917240416/en/EarthGrid-and-EnerTech-Sign-US18-Billion-Joint-Venture-Agreement
- [Business Wire, Sep 2024] PyroGenesis Congratulates Client EarthGrid on US$18 Billion Joint Venture with EnerTech | https://www.businesswire.com/news/home/20240919240417/en/PyroGenesis-Congratulates-Client-EarthGrid-on-US18-Billion-Joint-Venture-with-EnerTech
- [PR Newswire, Jun 2024] EarthGrid Announces Successful Field Tests of Plasma Tunnel-Boring Robot | https://www.prnewswire.com/news-releases/earthgrid-announces-successful-field-tests-of-plasma-tunnel-boring-robot-302181512.html
- [Perplexity Sonar Pro Brief] EarthGrid company overview and technology description
- [Netcapital] EarthGrid Raises $3.3 Million on Netcapital | https://www.netcapital.com/blog/earthgrid-raises-3-3-million-on-netcapital