Can you explain the difference between W, kW and kWh?

Can you explain the difference between W, kW and kWh?

Kilowatt hours (kWh) show how many kWs an appliance uses each hour to run. It is simply a unit of measurement that equals the amount of energy you would use if you kept a 1,000-watt (W) appliance running for an hour.

How much would it cost to run a 1000w (1kW) heater for 1 hour if you are charged 25c/kWh by your energy retailer?

 

1 - Find out how much you pay per unit of electricity - In this example, we are paying 25 cents per kilowatt-hour (kWh)

 

2 - Find out how much input power the appliance uses in kilowatts (kW) - The input power is usually marked on the appliance, its packaging or in the instruction manual in 'watts'. Kilowatts can be calculated by dividing watts by 1000. Using our example of an 1000w heater: 1000 watts รท 1000 = 1kW

 

3 - Estimate hourly running cost - Multiply the input power in kW by the price of your electricity per kilowatt-hour (kWh).

1kW x 25c per kWh = 25 cents per hour

    • Related Articles

    • How do I know how much an appliance costs to run?

      Electrical appliances are rated in watts (W) or kilowatts (kW). For example, a 100W globe left running for 10 hours would use 1 kWh of electricity, while a 1 kW-rated portable heater switched on for 5 hours would use 5 kWh of energy.
    • Can you explain my energy charges?

      Electricity is measured in a unit of power called a watt. 1,000 watts is equivalent to 1 kilowatt (kW). Your electricity charge on your bill is in cents per kilowatt hour (c/kWh).   Check the second page of your bill for the c/kWh tariffs.   Gas is ...
    • What are the running costs of box coolers and electric space heaters?

      Heater type Running cost / 500 hours Portable electric heater (2.4kW) $312.50 https://www.sustainability.vic.gov.au/You-and-your-home/Save-energy/Cooling/Cooling-running-costs   Cooler type Energy star rating Annual energy cost* Annual GHG emissions ...
    • What is the Victorian Energy Assistance Program (EAP)?

      LIMITED NOW (from July 2021) TO HELPING WITH THE $250 POWER SAVING BONUS APPLICATION. This Victorian State Government program was a COVID-19 initiative and started in October 2020. It is for Victorians only, and is delivered by Brotherhood of Saint ...
    • Who can the Energy Assistance Program (EAP) help?

      If you live in Victoria and if as a result of COVID-19, you have worked or are working from home, and your energy bills have gone up we want to provide you with some advice tailored especially for you and your circumstances. This is a free service to ...