Key idea
Monthly energy can establish average power. It cannot identify the timing or size of the peak.
Power and energy answer different questions
The U.S. Energy Information Administration distinguishes power, expressed in watts or kilowatts, from energy used over time, expressed in watthours or kilowatthours. A 1 kW load operating for one hour uses 1 kWh. A monthly energy total records accumulated use, not its time profile.
A transparent numerical example
Consider a hypothetical 30-day month with 720 kWh of energy. Average power is 720 kWh ÷ 720 h = 1 kW. A steady 1 kW profile and a profile using 2 kW for half the hours can have the same energy total. Their peaks differ. This example is illustrative and contains no utility consumer data.
What this means for research
A next-month energy forecast should be reported in kWh. Dividing observed energy by period hours gives average power, which is a lower bound on the peak over that period; it is not a peak estimate. Studies of hourly load shifting or peak reduction need finer-resolution observations and explicit response assumptions. This boundary shapes the IIMEEE forecasting and sanctioned-load projects.
Evidence basis: official-source educational synthesis. No original experimental result or hands-on product test is claimed.
Sources & verification
EIA — Measuring electricity
Definitions of watts, kilowatts and energy measured over time. The worked example and research implications are IIMEEE explanations.
Sources checked 3 October 2026. Recheck changing claims before publication and record dated corrections.