1000 watts = 1 KW, so: 820 watts = 0.82 KW 0.82 KW * 24 hours = 19.68 KWH
Power consumption is measured in kilowatt hours.
100 watts × 10 hours = 1000 watt hours = 1 kilowatt hour (= 1 kwh) = 1 unit of electricity.
First, divide watts by 1000 to get kilowatts: watts / 1000 = kW Then multiply kilowatts by the hours of usage to get kilowatt-hours kW * hours = kWh Finally, multiply kilowatt-hours by the cost per: kWh * (cost per kWh) = cost to operate
Two formulas are needed to calculate the answer:[Energy (watt-hours)] = [Power usage rate (watts)]? x [Time (hours)]and[Power usage rate (watts)] = [Voltage (volts)] x [Current (amps)]?
The 12 v light should have the voltage and the power in watts printed on it. When it is running, it uses that amount of watts continuously. The energy is measured by the watt-hours, in other words the watts multiplied by the number of hours it runs for. 1000 watt hours makes 1 kilowatt-hour, which is a Unit on the electricity bill.
Power consumption is measured in kilowatt hours.
About 10 to 50 amps current or 2000 to 10000 watts.
100 watts × 10 hours = 1000 watt hours = 1 kilowatt hour (= 1 kwh) = 1 unit of electricity.
Kilowatt hours.
You multiply the number of watts by the number of hours those watts are used, resulting in watt-hours. Electrical usage is often billed in increments of kilo-watt-hours, or how many thousands of watt-hours were used during the billing period.
Need to know the voltage. Quantity of electricity is expressed in Watts. Watts = amp x volts. Total quantity is expressed in watt/hours.
If by "200 vs. 400" you mean a power unit like watts, you will consume the same energy (800 Wh or 0.8 kWh) in both cases.
Amps times volts = watts Watts measures the rate of power usage. watts times hours = watt hours Watt hours is a measure of the amount of power used.
First, divide watts by 1000 to get kilowatts: watts / 1000 = kW Then multiply kilowatts by the hours of usage to get kilowatt-hours kW * hours = kWh Finally, multiply kilowatt-hours by the cost per: kWh * (cost per kWh) = cost to operate
electricity usage is measured in watts. How many a house uses depends on a lot of things. Heating air, conditioning water heating etc.
Two formulas are needed to calculate the answer:[Energy (watt-hours)] = [Power usage rate (watts)]? x [Time (hours)]and[Power usage rate (watts)] = [Voltage (volts)] x [Current (amps)]?
The 12 v light should have the voltage and the power in watts printed on it. When it is running, it uses that amount of watts continuously. The energy is measured by the watt-hours, in other words the watts multiplied by the number of hours it runs for. 1000 watt hours makes 1 kilowatt-hour, which is a Unit on the electricity bill.