* Watt * are you talking about?

A Watt is a unit of electrical energy. All electrical devices identify how many Watts are required to run them. For instance, and energy efficient light bulb might be described as an 18W globe. A large space heater might use 2,400 Watts.

A kilowatt is a thousand Watts. In the space heater example, 2,400 Watts can also be described as 2.4 kilowatts. This is written as 2.4kW.

A megawatt is a million Watts. This is written as 1MW.

Electricity must be used at the same moment it is made, or it is lost. For this reason, the production of electricity must be sustained for a period of time for it to be useful (a bolt of lightning is very powerful but very brief and therefore not very useful). The convention is to describe electrical output in terms of hours. My system is rated at 6.75kW. If it were operated in ideal lab conditions for an hour it would produce 6.75kWh. In reality, the most I've seen it produce is 6kW (which, if run for an hour, would make 6kWh). The Gross Feed-In Tariff pays 50.05 cents for each kilowatt hour. If my system is running at capacity, I can earn $3.00 / hour. Refer to Energy Production to review actual energy production data.