The company’s power plant, the PWR-20, consists of a few dozen rectangular modules that are factory-made and produces 20 MW of electricity through a pressurized water reactor.

[5] In 2019, the Center introduced the Nuclear Energy Grand Challenge, a prize competition that asked university students to develop business proposals for mitigating the cost, duration, and risks of power plant construction and maintenance.

[8] In February 2020, the EIC introduced OPEN100, an open-source platform that aims to ease the design and construction process of nuclear power plants by providing freely-available blueprints.

[18] Kugelmass gave a speech at SXSW that month outlining how to reignite nuclear power by focusing on reducing the cost and timeline of construction.

[23] In April 2024, Kugelmass confirmed during a BBC interview that data centers made up approximately half of Last Energy's commercial agreements, which were for over 55 reactors at that point.

The 80MW project is expected to create a capital investment of £300 million[28] and will provide power to regional industrial customers in Bridgend in South Wales.

[32] According to Reuters, in December 2024, the Export-Import Bank of the United States issued a letter of intent to Last Energy indicating a willingness to provide $103.7 million in debt financing for the delivery of its first microreactor in Wales.

The company’s first product, the PWR-20, is a 20 MWe micro-modular nuclear power plant,[34] made up of modules that collectively fit inside of a standard shipping container.

The purpose of modular design is to ensure that all pieces of the power plant can be constructed in a factory, transported via trucks, and then delivered as a kit onsite with a "plug-in ready" electrical system.

[47] Due to its reliance on air cooling systems, the PWR-20 does not need to be sited near a water source and is tailored to serve dispersed energy users.