What Is A Kilo-Watt Hour (KWh)?
A KWh is one thousands watts for one hour.
Or the equivalent; for instance 2000 watts for 1/2 an hour or 500 watts for 2 hours.
Watts are units of power. Many different fields of engineering use watts but watts are most often used in an electrical context.
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Why Use KWh?
A KWh measures electrical power over time. A KWh measures the quality of the solar panels; how hard the solar panels work over time.
Photo Voltaic (PV) solar panels produce electricity; electricity is described by current and voltage. The unit of measurement ‘Watt’ combines voltage and current:
watts = current x voltage
If a PV solar panel produces 5 amps of current at 250 volts:
watts = current x voltage
watts = 5 x 250 = 1250 watts
Divide by 1000 to get KW = 1250/1000 = 1.25 KW.
Breakdown Of The Term KWh
Kilo Watt Hour (KWh)
Kilo = 1 thousand.
Hour = a unit of time.
1 KWh = 1 thousand watts for one hour.
A KWh is a measure over time similar to 50 miles per hour, £10 per hour or £225 per week.
Watt Hour
Different Measures Over Time
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