Megawatt (MW)

A megawatt (MW) is a unit of power equal to one million watts, or 1,000 kilowatts. It expresses the rate at which electricity is consumed or produced at a given instant, and it is the standard unit for describing the capacity of power plants, substations, and large compute facilities. When a Hashcenter is described as a "20 MW site," that figure is its instantaneous electrical capacity — the load it can draw when fully populated and running flat out.

Power versus energy

The most common confusion in the field is between a megawatt and a megawatt-hour (MWh). The megawatt is a rate, like the reading on a speedometer; the megawatt-hour is a quantity, like the distance traveled. A 1 MW load running continuously for one hour consumes 1 MWh of energy; run it for a year and it consumes about 8,760 MWh. The distinction matters for every miner because power capacity determines how many machines you can energize, while energy consumed over time is what appears on the electricity bill. Utilities often bill large customers on both axes — an energy charge per MWh plus a demand charge based on peak MW — which is why flattening your peak can matter as much as trimming your consumption.

The scale ladder

It helps to walk the ladder from the wall socket up. A single modern ASIC draws on the order of a few kilowatts — about the same as a clothes dryer. A home miner's panel might responsibly host a handful of machines, perhaps 10–20 kW. A small container site runs a few hundred kilowatts. At 1 MW you can energize roughly 250 to 300 modern machines at about 3.5 kW apiece, before cooling and conversion overhead — and you have left the world of ordinary electrical service entirely. Megawatt-scale loads require dedicated grid interconnection through an electrical substation, three-phase distribution, engineered transformers and switchgear, and a utility relationship measured in months of study and negotiation rather than a service call.

Sizing a mining load honestly

Nameplate arithmetic understates a real facility. Beyond the miners themselves, budget for power conversion losses in every PSU and transformer, fans or pumps for cooling — immersion systems shift the load but do not eliminate it — plus networking and lighting. Designers also derate: continuously loading electrical gear at 100% of its rating is how equipment dies young, so a "1 MW site" typically deploys meaningfully less than 1 MW of miners. Working the problem in kilowatts per machine and megawatts per site, rather than in machine counts, is the habit that keeps a deployment inside its breakers.

The unit also converts directly into hashrate, which is the fastest way to sanity-check any facility claim. Divide watts by efficiency: a fleet averaging 20 joules per terahash turns 1 MW into roughly 50 PH/s, while an older 30 J/TH fleet yields about 33 PH/s from the same megawatt. Run the arithmetic in reverse and a "100 PH/s farm" implies about 2 MW of modern machines before overhead — if the pitch deck says 1 MW, someone is rounding creatively. Joules per terahash is watts per terahash-per-second, so the conversion needs no constants to memorize, just division; it is the single most useful back-of-envelope habit in mining diligence.

Why the unit runs the economics

Nearly every number that decides mining profitability is denominated against this unit: hosting is quoted per kW or per kWh, energy bills per MWh, renewable certificates per MWh, curtailment programs per MW of interruptible load, and machine efficiency in joules per terahash — which is just watts per terahash by another name. Fluency with the megawatt is therefore not trivia; it is the shared language of the engineering and the economics of any serious facility, and the reason a miner who understands their meter usually outlasts one who only understands their hashrate.