Ambrosia Energy has commenced construction on a 10 GWh battery factory near Austin, Texas. The factory, which will occupy 150,000 square feet, is set to reach full production in two to three years, allowing the company to build approximately 300 megawatt power plants annually.

The startup, which emerged from stealth in June, plans to construct power plants for data centers at a cost of £100 per megawatt hour. Ambrosia's founders, Ben Longmier and Sara Spangelo, chose solar plus batteries as the most cost-effective and deployable solution, with solar panels powering the load during the day and batteries discharging at night and on cloudy days to ensure 24/7 operation.

Ambrosia's first commercial power plant, to be built in West Texas, will feature 300 megawatts of solar panels and 660 megawatt-hours of batteries, delivering 30 megawatts of continuous power with a goal of 99.3% uptime. Even with overbuilding solar and batteries to achieve this, the company can remain profitable at £100 per megawatt hour, making it competitive with natural gas turbines that many hyperscalers are planning to use.

To hit its cost targets, Ambrosia has simplified its components, reducing part counts and manufacturing many components in-house. The startup claims its pack has the fewest parts by a factor of about 100 compared to its competitors, allowing it to achieve a cost of about 1.3x the cost of the bare cell, compared to 5-7x for most stationary storage systems.