Pentagon’s Energy Expo Showcases Military Microgrids, Nuclear Microreactors

The U.S. Department of War opened a three-day Energy Innovation Expo, branded “Energy Sentry,” at the Pentagon on September 22, 2026, displaying more than 100 energy projects from the Army, Navy and Air Force. The exhibits ranged from standardized tactical microgrids to nuclear microreactor programs, underscoring a shift in how the U.S. military is treating energy — not as a background utility, but as a core operational and industrial priority spanning both domestic bases and forward-deployed forces.

What the Expo Put on Display

According to the Department of War, the exhibits at Energy Sentry included the Army’s Tactical Microgrid Standard, a common architecture meant to let generators, batteries and renewable sources on a base or in the field interoperate; the Navy’s Common Operational Resilience and Energy Storage system; a Navy concept for beaming power from space using microwaves; and the Air Force’s METEOR system (Modular Energy for Tactical Expeditionary Operations Resource), a deployable tactical power platform. Officials framed the expo around what they called the convergence of “installation energy” — the power running domestic bases — and “operational energy” — the fuel and batteries that power forces at the tactical edge.

The Nuclear Track: TRISO Fuel, Janus and ANPI

A significant share of the expo focused on nuclear power. The department said it is accelerating development of TRISO (tristructural isotropic particle) fuel to build a domestic supply chain for advanced reactor fuel. That supply chain is meant to support two parallel microreactor efforts: the Army’s Janus program, which plans to deploy commercially owned and operated nuclear microreactors at domestic installations, and the Air Force’s Advanced Nuclear Power for Installations program (ANPI).

The Janus program itself was formalized in late August 2026, when the Army, working with the Department of War’s Defense Innovation Unit, selected five vendors — Antares Nuclear, BWXT, General Atomics, Radiant and Westinghouse — to build microreactors at five installations: Fort Bragg, Fort Campbell, Fort Hood, Fort Benning and Fort Drum. Funding is structured as up to $2.2 billion across fiscal years 2027 through 2031, paid on a milestone basis tied to technical progress rather than disbursed upfront. The Army has set a target of September 2028 for the first reactor to reach operation, and expects more than 20 microreactors to eventually be built and operated across Department of War installations once private capital is factored in.

Why the Pentagon Is Merging Base and Battlefield Power

Officials tied the expo to a broader energy self-sufficiency mandate: installations are being pushed toward roughly 14 days of independent power capability, a target driven in part by rising base electricity demand from data-heavy training systems, electrified logistics equipment and AI workloads. The department also said its Army and Navy microgrid and storage systems are components that support Golden Dome, the U.S. homeland missile-defense architecture, without detailing site-specific configurations. The framing reflects a recurring theme in this year’s defense-energy planning: installation power reliability and battlefield energy logistics are increasingly treated as one continuous problem rather than two separate ones.

Where This Technology Shows Up in Civilian Energy

Each of the technologies on display has a direct civilian analogue. Tactical microgrid standards mirror the interoperability work utilities and campus/industrial microgrid operators have pursued for grid-edge resilience, letting batteries, generators and renewables share a common control layer. TRISO fuel and the reactor vendors selected for Janus — BWXT, General Atomics, Westinghouse and Radiant, alongside newer entrant Antares Nuclear — are the same companies pursuing microreactor and small modular reactor designs for civilian customers, including data centers and remote or off-grid industrial sites. The Navy’s storage systems draw on the same lithium-ion and grid-scale battery technology being deployed by civilian utilities for frequency regulation and renewable-firming applications. In effect, the Pentagon’s procurement is helping seed manufacturing capacity and supply chains — particularly for TRISO fuel and microreactor components — that the same vendors can subsequently offer to civilian utility and industrial customers.

Sources

• U.S. Department of War — “Pentagon Showcases Dozens of Advanced Energy Projects,” September 22, 2026 — war.gov
• U.S. Army — “Army Reaches Agreement with Private Industry for Nuclear Micro-Reactors,” August 2026 — army.mil
• World Nuclear News — “US Army selects five microreactor vendors to power bases” — world-nuclear-news.org
• ExchangeMonitor — “Pentagon shows off new nuclear projects at energy expo” — exchangemonitor.com

Illustrative image. Photo: Shixart1985, CC BY 2.0, via Wikimedia Commons — source