Power

Power is a physical force, and in the Renewable Energy area we can divide it into two understandings. The first is kenitic, that is demonstrated in a spinning windmill or turbine blade. This twisting force can be described as torque. There is a huge amount of kenitic power available in a sixteen foot turbine being moved by a fifteen mile per hour wind. (See, Formulas).
The second form of power used and spoken about in the Renewable Energy area is, Electrical Power. This power is produced by an electromechanical device called a generator. The power from a generator is rated in watts. An example; This generator's output is, 1000 watts DC (direct current) it's voltage, 48 volts DC and 20.83 amps DC, at 1200 revolutions per minute. The term ''alternator' is now used to describe a generator that produces AC (alternating current). A 1000 watt AC alternator with comparable output would have an additional rating called frequency (Hz) hertz. An example; This alternator's output is, 1000 watts AC it's voltage, 120 volts AC and 8.33 amps AC. The frequency of the AC output is 60 Hz (hertz) at 1200 revolution per minute. ( See, Three Phase)