Ambrosia Energy to Build 10 GWh Battery Factory in Texas for Off-Grid Data Center Power

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Ambrosia Energy plans a 150,000-square-foot factory near Austin to produce 10 GWh of batteries, enabling solar-powered, continuous off-grid energy for data centers at competitive costs.

Ambrosia Energy, a startup focused on delivering clean power solutions for data centers, announced plans to build a large-scale battery manufacturing facility near Austin, Texas. The factory will span 150,000 square feet and is expected to reach full production capacity within two to three years. This facility aims to produce batteries with a combined capacity of 10 gigawatt-hours, enabling the creation of approximately 300 megawatts of power plants annually for deployment at various field sites.

The company was founded by Ben Longmier and Sara Spangelo, who previously established the satellite startup Swarm, later acquired by SpaceX. Ambrosia emerged publicly in June with the goal of providing data centers with renewable power solutions combining solar panels and battery storage at a cost target of $100 per megawatt-hour. Their system uses solar energy during daylight hours to power operations and charge batteries, which then supply electricity overnight and during cloudy conditions, maintaining uninterrupted service.

Later this year, Ambrosia will begin constructing its first commercial power plant in West Texas. The facility will feature 300 megawatts of solar panels paired with 660 megawatt-hours of battery storage, designed to deliver 30 megawatts of continuous power with an uptime goal of 99.3%. This approach offers a clean energy alternative that competes favorably on cost and reliability with traditional natural gas turbines commonly used by hyperscale data centers.

Ambrosia has also been developing a pilot-scale power plant capable of continuous 200-kilowatt production, which has operated for over 100 days to date. To meet cost objectives, the startup has innovated by simplifying components, including designing proprietary solar mounts and battery packs with dramatically fewer parts than typical stationary energy storage systems. By manufacturing many components in-house and purchasing existing battery cells, Ambrosia has reduced costs to approximately 1.3 times the price of bare cells, a significant improvement over the 5 to 7 times costs typical in the industry.

This strategy could position Ambrosia Energy as a notable player in the clean energy infrastructure segment, providing scalable, cost-effective off-grid power solutions tailored to the demanding uptime requirements of modern data centers.