Exowatt

Exowatt is a Miami-based energy company building modular power systems aimed at AI data centers and other large industrial loads. Its main product, the Exowatt P3, packages solar collection, long-duration thermal storage, and electricity generation into a single 40-foot shipping container. The unit uses specialized lenses to concentrate sunlight, stores the heat in a thermal battery, and dispatches power on demand through a heat engine, providing up to 24 hours of round-the-clock generation per cycle. The company has claimed an unsubsidized cost of roughly four cents per kilowatt-hour and reports a demand pipeline measured in tens of gigawatt-hours. Backers include Andreessen Horowitz and Sam Altman, with about $90 million raised by early 2025. First commercial deployments are targeted across multiple North American sites with hyperscaler and industrial customers.