MWp is an abbreviation for Megawatt peak – a unit of measurement for the output of power from a source such as solar or wind where the output may vary according to the strength of sunlight or wind speed. MWp is a measure of the maximum potential output of power. A Megawatt is 1,000 kilowatts. A kilowatt is 1,000 watts. A watt is one amp flowing through one volt. The average UK house consumed about 4,700kwh of electricity in 2010.