A kilowatt is a measure of 1000 watts of electric power. All kilowatts and watts represent a transfer rate of energy. Your electric bill bills you in terms of kilowatt-hours (kWh) for electricity. One kilowatt-hour is an electricity unit which is equal to one kilowatt of power consumed for an hour.
The production of a Solar Panel depends on its scale. A 100-watt panel left in the sun for 1 hour would produce 100 watt-hours of electricity (or 0.1 kilowatt-hours). If you have a1-kilowatt solar system and five peak sun hours a day (an approximate Florida average), then your 1-kilowatt solar system will generate 5-kilowatt hours of electricity a day.