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  2. Kilowatt-hour - Wikipedia

    en.wikipedia.org/wiki/Kilowatt-hour

    The cost of running an electrical device is calculated by multiplying the device's power consumption in kilowatts by the operating time in hours, and by the price per kilowatt-hour. The unit price of electricity charged by utility companies may depend on the customer's consumption profile over time. Prices vary considerably by locality.

  3. List of countries by electricity consumption - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    By 2025, Asia is projected to account for half of the world’s electricity consumption, with one-third of global electricity to be consumed in China. [1] This list of countries by electric energy consumption is mostly based on the Energy Information Administration. [2]

  4. Load factor (electrical) - Wikipedia

    en.wikipedia.org/wiki/Load_factor_(electrical)

    In electrical engineering the load factor is defined as the average load divided by the peak load in a specified time period. [1] It is a measure of the utilization rate, or efficiency of electrical energy usage; a high load factor indicates that load is using the electric system more efficiently, whereas consumers or generators that underutilize the electric distribution will have a low load ...

  5. Units of energy - Wikipedia

    en.wikipedia.org/wiki/Units_of_energy

    A unit of electrical energy, particularly for utility bills, is the kilowatt-hour (kWh); [3] one kilowatt-hour is equivalent to 3.6 megajoules. Electricity usage is often given in units of kilowatt-hours per year or other periods. [4] This is a measurement of average power consumption, meaning the average rate at which energy is transferred ...

  6. List of countries by energy consumption per capita - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    The data are given in kilograms of oil equivalent per year, and gigajoules per year, and in watts, as average equivalent power. Notes on conversions. 1 kg of oil equivalent (kgoe) = 11.63 kWh or 1 kWh = 0.08598 kgoe [2] 1000 kgoe = 42 GJ; 1 GJ/a = 31.7 W average; 1 W average = 8.76 kWh per year (365 × 24 Wh per year)

  7. Energy conversion efficiency - Wikipedia

    en.wikipedia.org/wiki/Energy_conversion_efficiency

    For example, an ideal fuel cell operating at a temperature of 25 °C having gaseous hydrogen and gaseous oxygen as inputs and liquid water as the output could produce a theoretical maximum amount of electrical energy of 237.129 kJ (0.06587 kWh) per gram mol (18.0154 gram) of water produced and would require 48.701 kJ (0.01353 kWh) per gram mol ...