Prometheus enables 100% 24/7 renewable power, storing electricity surpluses as liquid fuels and dispatching the energy when needed, for 1500+ hours at a capital cost of less than $5/kWh.
Prometheus stores electricity as low cost clean diesel and methanol through direct air capture and advanced electrochemistry.
With the ability to store thousands of GWH of energy and generate power at any rating conventional generators can achieve, a unique new capability is introduced for the first time – data centers and grids that can operate using 100% renewables. No more “fossil fuel backup” required.
Prometheus fuels generate power using conventional generators, with high reliability, peaking and baseload capability. When grid connected, our systems offer spinning reserves and inertia that high reliability requires.
Because we purpose-built our tech stack for intermittent operation, we don’t need a grid. Our energy storage systems can quickly switch from charging to discharging to match dynamic renewable availability and provide high reliability power, on or off-grid. Our low capital costs mean that our systems can store energy at the low capacity factors typical of off-grid solar.
A new way to store and use energy
Prometheus absorbs CO2 from the atmosphere and stores it as carbonate (CO3). Using its proprietary technology, carbonate and electricity are transformed into hydrocarbon fuels.
When electricity is abundant, Prometheus can store thousands of hours of energy from intermittent renewable sources, making that energy available again for firm, dispatchable power when needed.
When the fuels are used to generate power, the carbon and water from these fuels is recaptured and stored again as carbonate salts in water. This capture can be done at any time, with the carbonate turned into fuel later when energy is abundant again. Near zero emissions.
The electricity stored in the chemical bonds in the fuel is dispatched, returning the hydrocarbon to water and carbonate again. The principle is similar to batteries that store and release electricity from lithium or iron by changing their oxidation state. We do the same, but with carbon.
No capex for data center developer, 100% of project finance capex for site developer consists of conventional proven equipment, paid for entirely by tax credits. Prometheus technology leased as operating expense. Built in phases — Prometheus pays for first phase (demonstration at scale).
300 MW (continuous, 24/7)
1,500 hours (August–September)
450 GWh
99.99% pure methanol (tank storage)
Longview, Cowlitz County, Washington
Mint Farm Generating Station (310 MW CC)
Zero (closed carbon loop + DAC)
1–2 ppm (10X lower than natural gas’ 9–25 ppm)
150,000+ tons annually
18–24 months from financial close
$984M
$3,279/kW, / $2.19/ kWh
$145/MWh
Cover more than 100% of capital cost
Negative (net revenue generating)