Solaris Takes Equity Stake in Deployable Energy as Unity Reactor Inches Toward Market

Deployable Energy has taken an equity investment from Solaris Energy Infrastructure, a deal Solaris disclosed on Aug. 5, 2026 that pairs an early-stage nuclear developer with an operator that already builds and runs power infrastructure. The transaction amount, ownership stake, valuation and formal round name were not disclosed.

The Houston-based company, founded in 2025 and located in the city's Energy Corridor, is developing the Unity Nuclear Battery, a compact 1 MWe gas-cooled microreactor designed for modular deployment in remote, distributed and behind-the-meter applications. Unity uses standard low-enriched uranium dioxide fuel and a helium primary cooling loop. The company is led by co-founder and CEO Bobby Gallagher.

The deal is not a conventional venture announcement built around a large disclosed check and a list of financial backers. It reads more as an industrial alignment: Solaris gains early exposure to next-generation nuclear technology, while Deployable Energy picks up a collaborator with experience across generation, distribution, installation, commissioning, operations and maintenance. Solaris said the two companies plan to collaborate on commercializing Deployable Energy's technology, and that it expects the technology could eventually complement its existing generation capabilities.

That overlap matters because Solaris delivers power generation and distribution systems to data centers, energy companies and industrial customers, and has framed grid interconnection delays and speed-to-power requirements as durable demand drivers. Deployable Energy is targeting sites where grid capacity, fuel logistics or conventional construction become constraints.

The investment follows Unity's zero-power fueled criticality demonstration on June 30, completed through the U.S. Department of Energy's Nuclear Energy Launch Pad initiative at Idaho National Laboratory. The DOE identified Unity as the third DOE-authorized advanced reactor to reach criticality before July 4, 2026. That test was deliberately limited to zero-power operation, and a DOE environmental review states it did not generate electricity, usable thermal energy or sustained reactor power. Criticality validated reactor-physics assumptions; licensing, engineering, manufacturing, financing, site integration and customer deployment remain ahead.

The NRC has been engaged with Deployable Energy on pre-application activities for Unity since October 2025 — a regulatory path to work through, not a completed license. Solaris has not announced a deployment contract or guaranteed commercial timeline, and a strategic investor does not remove the technical, regulatory or economic risk surrounding a new reactor design. What it can do is bring commercial context earlier into the development cycle, when decisions about manufacturability, installation, service, operations and customer requirements can still shape the product.