Exowatt Raises $140M to Scale Dispatchable Solar Power for AI Data Centers
Exowatt, the Miami‑based renewable energy startup focused on developing modular, dispatchable solar power solutions for data centers and other energy‑intensive applications, has rapidly become one of the most closely watched companies in the clean energy and AI infrastructure space after securing significant venture funding to accelerate its technology development and deployment. Founded in 2023 by Hannan Happi and Atomic CEO Jack Abraham, Exowatt’s mission is to make sustainable renewable energy always available and nearly free.
The company’s fundraising journey began with a $20 million seed funding round in April 2024, which helped kick‑start product development and build early momentum. This initial round was backed by prominent investors including Andreessen Horowitz (a16z), Atomic, and Sam Altman, CEO of OpenAI, along with other strategic participants such as 8090 Industries and Climate Capital. The seed capital was deployed to accelerate engineering work on Exowatt’s flagship product, the Exowatt P3, hire talent, and secure early capacity reservations from data center customers.
Building on that early success, Exowatt closed a $70 million Series A funding round in April 2025, raising its total funding to $90 million to date. The Series A was led by Felicis, a venture capital firm based in Silicon Valley known for backing disruptive technology companies across sectors. Of the $70 million raised in the Series A, $35 million came from equity and $35 million from debt financing provided by HSBC Innovation Banking and other lending partners. Exowatt said this mix of equity and debt underscored investor confidence in both its technology and commercial strategy.
In addition to Felicis and HSBC Innovation Banking, a wide range of institutional investors participated in the Series A round, reflecting broad interest in dispatchable renewable energy solutions. These included Andreessen Horowitz (a16z) returning from the seed round, along with Starwood Capital, Thrive Capital, MCJ Collective, MVP Ventures, GOAT VC, StepStone Group, and others. Many of these investors also supported Exowatt in earlier rounds, demonstrating continued belief in the company’s long-term potential.
The capital raised in the Series A round has been earmarked for scaling production and deployment of the Exowatt P3, a modular solar system that captures solar energy and stores it as heat in a long‑duration thermal battery before converting it into electricity on demand. This design enables 24‑hour dispatchable power output, a capability that distinguishes Exowatt’s solution from traditional solar technologies and positions it as a compelling option for AI data centers and other commercial and industrial power consumers seeking reliable, clean power. The company reported a backlog of over 90 GWh in capacity reservations across U.S. data centers, energy developers, and hyperscalers, signaling strong market demand for its technology.
The momentum behind Exowatt’s fundraising and product strategy continued into late 2025 with additional capital infusions. In November 2025, Exowatt announced an additional $50 million in funding, extending its Series A and bringing cumulative funding raised to around $140 million. This tranche was led by MVP Ventures and 8090 Industries, and included participation from investors such as The Florida Opportunity Fund, DeepWork Capital, Dragon Global, Massive VC, New Atlas Capital, BAM, Overmatch Ventures, Protagonist, StepStone, Atomic, and Bay Bridge Ventures. The new capital is set to accelerate the U.S. rollout of Exowatt’s P3 systems, expand manufacturing capacity, and further position the company to meet growing energy needs driven by AI and data center growth.
Collectively, Exowatt’s funding milestones—seed, Series A, and subsequent extensions—highlight the rapid rise of the company in the renewable energy sector and the growing investor appetite for technologies that can deliver reliable, scalable clean power. With a diverse investor base that includes leading venture capital firms, strategic energy investors, and tech industry figures, Exowatt is leveraging its financial backing to bring dispatchable solar energy products to market at a time when power demand from data centers and AI workloads is surging.
As Exowatt scales its operations and moves toward commercial deployments, its leadership has emphasized the importance of domestic manufacturing and rapid deployment to meet urgent energy needs. The company’s fundraising achievements underscore its ambition to make long‑duration renewable power a cornerstone of next‑generation energy infrastructure.
