A 230-megawatt (MW) data center represents a very large electrical load: if it drew 230 MW continuously, it would use 5,520 megawatt-hours (MWh) of energy each day, or 2.0148 terawatt-hours (TWh) over a 365-day year. Those are constant-load calculations, not a prediction of any facility’s actual consumption. Whether the site needs new grid infrastructure depends on its location, connection conditions, available supply and operating profile—not on the 230 MW figure alone.
What does 230 MW mean?
A megawatt measures power—the rate at which electricity is being used at a given moment. One MW equals one million watts, so 230 MW is a demand rate of 230 million watts when the facility is drawing power at that level.
Energy measures use over time. Multiply power by the number of hours to calculate energy: MW × hours = MWh. This distinction matters because a facility’s stated MW capacity or connection figure does not, by itself, tell you how much energy it will consume over a day or year.
How much electricity would a 230 MW data center use?
If the data center drew a constant 230 MW, the arithmetic would be:
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- One hour: 230 MWh.
- One day: 230 MW × 24 hours = 5,520 MWh, or 5.52 GWh.
- One 365-day year: 230 MW × 8,760 hours = 2,014,800 MWh, or 2.0148 TWh.
These figures are calculations from an assumed constant load, not measured consumption for a named facility. Actual annual use depends on how much power the site draws at different times. The Missouri Public Service Commission explains the distinction between power and energy in its energy impacts material.
How that compares with U.S. data-center demand
The U.S. Department of Energy reported that U.S. data centers used 176 TWh in 2023, about 4.4% of U.S. electricity use. The department’s 2024 announcement of a Lawrence Berkeley National Laboratory report gave an estimated range of 325–580 TWh for 2028, equivalent to an estimated 6.7–12% of U.S. electricity use. These are national totals and estimates, not a forecast for a particular 230 MW site. DOE’s announcement provides the figures and context.
Why 230 MW matters to the grid
FERC describes large loads generally as demand greater than 20 MW in its proceeding on interconnecting large loads to the interstate transmission system. A 230 MW load is more than 11 times that general threshold, making its grid connection a substantial planning matter. The threshold is regulatory context; it does not establish that a project will need a particular upgrade or follow the same process everywhere. See FERC’s RM26-4 proceeding.
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The grid impact depends on local conditions. Relevant considerations include the supply available near the site, the concentration of other large loads, the connection point and the upgrades required to serve the demand reliably. A 230 MW figure alone does not reveal whether the site’s power comes entirely from the grid, whether it has on-site generation or storage, or how often it operates at full demand.
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The Alberta Electric System Operator (AESO) lists “P3083 Keephills Data Centre Phase I – 230 MW” among its large-load projects. AESO says its interim 1,200 MW connection limit was fully allocated and that listed projects would proceed through its connection process. The page references a September 2025 update, and its status may change. This is an example of a 230 MW data-center phase in a grid-operator process; it does not identify the project in this article’s title as Keephills or establish whether that figure means IT load, total facility demand or another capacity measure. See AESO’s large-load project page.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Does a 230 MW data center need new grid infrastructure?
Not necessarily in the same way—or to the same extent—at every location. A large connection may require new or expanded transmission, substations or other grid equipment, but the need and scope depend on the local network and project details. A general load threshold or a connection number cannot determine the upgrades for an individual site.
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The U.S. Department of Energy identifies several broad ways to address growing data-center electricity demand: clean generation and storage, grid enhancement or expansion, energy efficiency, and demand-side flexibility. These options address different parts of the challenge:
- Generation and storage: add or arrange supply, with storage helping shift energy across time. Variable generation, storage and firm supply play different roles in meeting demand.
- Transmission and substations: strengthen or expand the network that carries electricity to the facility.
- Efficiency: reduce the electricity required to provide a given amount of computing service.
- Flexible demand: shift or adjust some electricity use when grid conditions require it.
These are response categories, not a prescribed package or ranking for every project. DOE notes that data-center demand is growing rapidly, varies by region, can be geographically constrained and often requires firm power. The measures a project needs depend on its location and specific requirements. See DOE’s overview of resources to meet data-center demand.
Quick Recap
What the 230 MW figure does—and does not—tell you
- It tells you: the stated power level or capacity is large; if sustained continuously, it equates to 5,520 MWh per day and 2.0148 TWh per 365-day year.
- It does not tell you: the facility’s measured or expected annual energy use, because that depends on its actual load over time.
- It does not establish: whether 230 MW refers to IT equipment, total facility demand, contracted grid capacity or a proposed connection.
- It cannot determine by itself: which grid upgrades, generation resources or operating measures will be needed.
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