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Watch Video Demonstration here:

http://www.youtube.com/watch?v=hiWwXp95doY

 

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waveform plot chart showing bike pedal current voltage

At this point in the chart the battery is connected directly to the inverter and the Toshiba TV set is playing a Clifford DVD cartoon.  The red and white lines show you that the battery is supplying a voltage of  around 12 Volts DC.   

The blue line is the current that the Toshiba Television Set is drawing from the battery.  You can see that it is moving up and down from about 4 to 7 Amps.  It is moving up and down because when the Clifford cartoon shows a scene where the screen is mostly white, the current goes up  because all 3 guns on the television tube are active. (the blue, red, and green all at once).  When the screen goes dark, the current drops down to 4 Amps. 

If you want to know how much power the battery is putting out at this point then you need to use the Power formula:

 Power = Voltage x Current.  Or P=IV

At this point you can see that some times the battery is supplying 4X12=48 Watts, and sometimes 7X12= 84 Watts.