Avalanche Energy, a startup based in Seattle, has raised $29 million to build fusion power machines that can sit on a table. The company wants to make fusion small and practical for uses like power on the moon, in deep sea vehicles, or even in transport. This fresh cash comes as they hit a big technical step forward with high voltages in their tiny reactors.
Background
Fusion power copies what powers the sun. It smashes atoms together to release huge amounts of energy without the long-lived waste from traditional nuclear plants. Most companies chase giant setups with massive magnets or lasers, but Avalanche takes a different road. They focus on machines so small they fit in a lab corner.
The company started in Seattle, part of a growing cluster of fusion firms in the Pacific Northwest. Two other outfits in the area also work on fusion. Avalanche's founders saw problems with big fusion projects. They take too long to test and build. Small size lets them change designs fast. In one year, they made 27 versions of their reactor. Workers can build new hardware right onsite in weeks.
Their setup, called the Orbitron, uses strong electric currents. Ions zip around an electrode in tight paths. As they speed up and pack closer, they crash and fuse. This releases energy and neutrons. Those neutrons have uses too, like testing materials or making medical isotopes.
Avalanche has pulled in cash before. They now have about $40 million total. A video from the team shows their path. They hit most goals for earlier funding but faced hurdles with plasma density. A old Soviet paper helped them redesign. That led to their latest success.
Key Details
The $29 million raise lines up with a key breakthrough. Avalanche ran their desktop machine for hours at 300,000 volts over just 2.5 inches. That's a density of 6 million volts per meter. The company says this gets them closer to a reactor that makes more energy than it uses.
Technical Milestone
Robin Langtry, co-founder and CEO, explained the approach.
"Getting to really high voltages is the key thing. That's the real unlock for us." – Robin Langtry, Avalanche Energy CEO
Unlike others who lean on magnets, Avalanche mixes electric fields with some magnetic help. This hybrid lets them build small. Their goal: reactors from 5 kilowatts to hundreds of kilowatts. Small enough to move, mass-produce, and use anywhere.
The funding will match part of a $10 million state grant from Washington. That money, from carbon market sales, builds FusionWERX. It's a testing site where other fusion teams can run gear and keep their ideas private. Avalanche expects rentals and neutron sales to bring profits by 2028. They predict $30 million to $50 million in sales by 2029.
Langtry said the raise is priority one to cover the grant match. They already have much of it in place.
What This Means
Avalanche's small fusion push challenges the big-reactor trend. If they succeed, fusion could power remote spots fast. Think lunar bases, undersea drones, or military gear. Neutrons from their machines open doors now. They can sell them for research, defense, or isotope production before full power plants work.
The Pacific Northwest hub grows stronger. FusionWERX could draw more teams, speeding tests across the field. Washington state's support shows governments betting on fusion clusters. Proceeds from carbon fees fund it, tying clean energy goals together.
For Avalanche, revenue paths look clear. Radioisotope sales and facility bookings build cash flow. That funds more reactor work. Their fast build cycle means quick fixes to problems. Plasma density was a wall last year. Now, with the redesign, they claim top density for small reactors.
Fusion stays tough. No company has net energy yet. But Avalanche's milestones build trust. Investors see a road to money soon. The $29 million signals belief in tabletop fusion. It could shift how the world sees this power source: not giant plants years away, but small units ready to ship.
The team keeps iterating. Weeks from design to test keeps them ahead. Applications span land, sea, space. Energy dense means one machine packs power of tons of coal. Secure and green, it cuts fossil fuel needs. As global power demand climbs, compact fusion fits mobile lives.
Langtry's vision: power without limits that scales with us. Seattle's startup shows fusion might come smaller than expected.
