Last Energy
Factory-built PWR microreactors sold through long-term power agreements
The product
The PWR-20, a factory-built 20 MWe pressurized-water microreactor plant using standard low-enriched uranium, and the PWR-5 pilot, a reduced-output design with the same physical dimensions and reactor geometry for demonstration at Texas A&M-RELLIS. Last Energy packages design, financing, construction, ownership and operation for behind-the-meter customers.
The thesis
Last Energy is pursuing conventional PWR physics in a compact, repeatable product and selling output rather than reactors. Its PWR-5 pilot has DOE approval of its Preliminary Documented Safety Analysis, creating a U.S. demonstration path alongside PWR-20 licensing and customer projects in the United Kingdom and Europe.
How it runs
Last Energy acts as a vertically integrated behind-the-meter independent power producer: it designs, finances, builds, owns, and operates modular PWR-20 plants at or near customer sites, so customers do not have to develop, finance, or run the nuclear asset.
How it earns
It sells electricity under long-term, fixed-price power purchase agreements. Public materials describe no-upfront-capital nuclear-as-a-service for customers; customer-specific contract economics are undisclosed.
Why it wins
Its 20 MWe plant combines established pressurized-water-reactor technology and standard low-enriched uranium with factory-built modules, compact siting, and repeatable deployment in 20 MWe increments, aiming to reduce project-delivery and financing risk.
Evidence ledger
- website · 2026-04-27
Last Energy identifies as a reindustrialization company.
https://www.lastenergy.com - organization-dossier-research · 2026-09-14
Dossier fields supported: operatingModel, revenueModel
https://www.lastenergy.com/ - organization-dossier-research · 2026-09-14
Dossier fields supported: strategicEdge, revenueModel
https://www.lastenergy.com/technology - first-party · 2026-09-23
Last Energy reports DOE approval of the PWR-5 preliminary safety analysis, the Texas A&M-RELLIS pilot, the PWR-20 UK design review and its DP World project.
https://www.lastenergy.com/news-press-categories/press-release - first-party · 2026-09-23
Last Energy describes itself as designer-owner-operator and behind-the-meter independent power provider selling power and heat as a service through PPAs.
https://www.lastenergy.com/faq - government · 2026-09-23
DOE documentation identifies Last Energy's PWR-5 pilot at the Texas A&M RELLIS campus.
https://www.energy.gov/sites/default/files/2026-04/NE_10CFR851_VariancePackage_Final_05JAN2026.pdf
Articles, news, and updates
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