Exowatt is a Miami-based renewable energy company that develops modular solar thermal systems designed to generate electricity on demand and provide reliable power for data centers, industrial facilities and other high consumption users. Founded in 2023, the company focuses on capturing solar energy, storing it as heat and converting it into electricity whenever required, allowing customers to access renewable generation during both daytime and nighttime hours.

Electricity demand continues to grow as artificial intelligence, cloud computing and digital services expand, and that growth places new demands on energy infrastructure. Traditional solar panels produce electricity only when sunlight is available, while wind generation depends on weather conditions. Battery storage can extend supply, yet large scale installations require substantial materials and can add cost. Exowatt developed its system to address these challenges by storing solar energy in thermal form and releasing it as power when facilities need it most.

How the P3 System Works

Exowatt’s flagship product, known as the P3 system, captures sunlight through optical components that concentrate solar radiation into a heat-based storage medium. The system stores energy at high temperatures inside a proprietary material that retains heat for extended periods with minimal loss. When electricity is required, the stored heat drives a heat engine that produces power for onsite consumption. This configuration enables dispatchable electricity that can operate throughout the day and night.

The company designed the P3 as a modular unit that fits within a standard shipping container, which simplifies transportation and installation. Each unit can function independently or operate alongside additional modules to increase total output. This scalable structure allows customers to begin with a smaller installation and expand capacity over time as energy requirements grow. By building systems that can be deployed at customer sites, Exowatt reduces dependence on long transmission lines and allows facilities to generate power close to where it is used.

Meeting the Demands of Data Centers and Industry

Data centers require reliable electricity to support cloud computing, artificial intelligence training and data storage services that run around the clock. Interruptions in power supply can disrupt operations and affect performance, so operators seek energy systems that deliver consistent output without depending entirely on grid availability. Exowatt’s technology provides onsite renewable generation that can help meet these requirements while supporting sustainability objectives.

Large technology companies and hyperscale operators have expanded their energy consumption as digital services grow. In response, many organizations are pursuing renewable energy procurement and infrastructure solutions that reduce reliance on fossil fuels. Exowatt’s modular solar thermal system offers one pathway for customers that want to secure long duration power while maintaining operational flexibility. Because the system stores energy as heat rather than relying solely on chemical batteries, it provides a different method for delivering electricity during periods when sunlight is unavailable.

The company reports strong interest from customers seeking power solutions that integrate with new data center projects. By offering a system that can be installed at or near facilities, Exowatt supports developers who want to reduce interconnection delays and begin operations with onsite generation capacity. This model allows energy production to align closely with facility construction timelines.

Funding, Manufacturing and Expansion

Since its founding, Exowatt has raised substantial venture capital funding to support product development, manufacturing and deployment. Investors include firms focused on technology, infrastructure and sustainable energy solutions. The financial backing enables the company to scale production of its modular systems and expand installations across regions with strong solar resources.

Exowatt manufactures its systems in the United States, which supports quality control and supply chain reliability. Factory production allows standardized assembly of components and consistent system performance across installations. The company has stated that domestic manufacturing helps shorten delivery timelines and supports large scale deployment for customers that require multiple units.

With capital in place, Exowatt has expanded beyond early pilot projects into commercial deployments and new infrastructure initiatives. The company has announced plans to develop powered land projects that integrate energy generation with site development for hyperscale facilities. This strategy allows customers to secure both land and renewable energy in a single coordinated project, reducing coordination between multiple providers.

Thermal Storage as an Alternative to Chemical Batteries

A distinguishing feature of Exowatt’s system is its use of thermal energy storage rather than lithium-ion batteries. While chemical batteries store electricity directly, thermal storage retains energy as heat and later converts it into electricity through a heat engine. This method allows long duration energy storage without depending on battery chemistry or rare earth materials commonly used in other storage systems.

Thermal storage systems can hold energy for extended periods, which supports continuous power delivery even after sunset. Because the stored energy exists in a stable form, operators can plan electricity production according to demand cycles. The system can provide consistent output for facilities that operate day and night, which makes it suitable for data centers, manufacturing sites and other continuous load environments.

Exowatt’s design integrates solar collection, storage and generation within a single modular unit. By using concentrated sunlight and high temperature storage materials, the company has created a platform that aligns renewable generation with industrial demand patterns. The technology reflects a focus on delivering electricity when it is required rather than only when sunlight is available.

Strategic Growth in Solar Regions

The company has identified regions in the United States with strong solar resources as attractive locations for deployment. Areas in the Southwest offer high levels of sunlight and available land that can support modular installations. By situating systems in regions with favorable solar conditions, Exowatt can maximize energy capture and deliver consistent output for nearby facilities.

Exowatt continues to expand its presence through partnerships, infrastructure projects and customer agreements. The company has reported a backlog of interest from data center developers and energy buyers seeking renewable solutions that support long term operations. As demand for electricity grows across digital industries, the company plans to scale manufacturing and installation capacity to meet that need.

Hannan Happi, Co-Founder & CEO, Exowatt