Fusion power startup Thea Energy has received a $20 million federal grant from ARPA-E to help manufacture its modular high-temperature superconducting (HTS) magnets. These magnets are crucial for magnetic confinement reactors, which are one of the key methods being explored to harness fusion energy.

Thea's reactor design, known as a stellarator, uses fewer types of magnets compared to traditional designs, reducing manufacturing costs. The 12 large magnets are made from four different templates, while over 300 smaller identical ones fine-tune plasma confinement. This arrangement allows for more forgiving construction tolerances, potentially lowering overall costs.

Thea Energy is among the top-funded fusion power startups, having raised $100 million in May after a $20 million Series A in 2024. The company aims to build a commercial-scale fusion power plant by the mid-2040s, joining other ambitious players aiming for this transformative technology.

While the path to commercial fusion remains challenging, grants like these offer hope that we might soon light up our world with sustainable and abundant energy, or at least create more heat in the process of trying.