Thea Energy has received a $20 million award from the U.S. Department of Energy's ARPA-E program to support production of its modular high-temperature superconducting magnets for fusion systems.
The funding is designed to help the startup scale a key part of its reactor hardware: the magnets that shape and control plasma inside magnetic confinement designs. These components are central to fusion power, where intense magnetic fields keep superheated plasma stable long enough for energy-producing reactions to occur.
The company's approach is built around a stellarator architecture, a reactor style that uses carefully twisted magnetic geometry to improve plasma confinement. To make manufacturing more practical, Thea Energy reduces part variety: its 12 larger magnets come from four templates, while more than 300 smaller magnets use a single design and are arranged around the reactor like pixels on a screen.
That software-guided layout is intended to allow more flexible construction tolerances and lower production complexity. Thea Energy is already one of the better-funded fusion startups, with $100 million raised in May and an earlier $20 million Series A round in 2024.
As fusion companies move from concept to industrial engineering, advances in magnet manufacturing could become a defining step toward practical clean energy systems in the decades ahead.
