Fusion startup Inertia raises $450M to build laser-powered plant by 2030
What’s the deal? Inertia Enterprises, a US fusion startup, has raised $450 million in Series A funding to build a commercial power plant powered by giant lasers. The round was led by Bessemer Venture Partners and includes Threshold Ventures, Long Journey VenturesDealroom has a profile for this one. Try Dealroom →, and GV.
The Livermore, California-based company plans to begin construction in 2030. It also aims to build a facility to manufacture its lasers and produce millions of fuel pellets.
Inertia is betting on laser-driven fusion, the only approach proven to generate net energy gain in a lab. The method was validated in 2022 at Lawrence Livermore National LaboratoryDealroom has a profile for this one. Try Dealroom →, when an experiment produced more energy than it consumed.
Chief executive officer Jeff LawsonDealroom has a profile for this one. Try Dealroom →, Twilio co-founder, said the company is developing a laser a million times more powerful than those used in that test. It plans to deploy 1,000 lasers firing 10 times per second at a commercial plant.
Why now? The 2022 breakthrough gave laser-based fusion new credibility. Most rivals are pursuing magnet-based systems that have yet to demonstrate net energy gain.
Investor appetite for deeptech and climate solutions remains strong, especially for technologies seen as de-risked. Bessemer partner Byron DeeterDealroom has a profile for this one. Try Dealroom → said most of the scientific risk has been “meaningfully reduced.”
What could go wrong? A lab result is not the same as a working power plant. Scaling to 1,000 ultra-powerful lasers firing repeatedly poses major engineering and cost challenges.
Fusion projects are capital-intensive and slow to commercialise, with construction not expected before 2030. Delays could increase funding needs.
The signal: A $450 million Series A is one of the largest early rounds in fusion. It shows investors are backing capital-heavy energy bets where science has cleared key hurdles.
The raise marks a shift from lab validation to commercial buildout in fusion. The focus is turning from proof to scale.
Sources:
Inertia Enterprises
GlobeNewswire
TechCrunch
Bloomberg
Photonics Spectra
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