Voltage output vs RPM curve for PPG-B300 DC Generator sold by Pedal Power Generator LLC
This graph shows actual data from this generator installed on a pedal power generator bike generator stand. It was measured using a LabVIEW program called “WattsVIEW” The red line on the chart shows the Amps measured while charging a lead acid 12V battery. The white line shows the Voltage of the battery. One can see that at one point the white line reached to approximately 14 Volts.
You may already know this but we will mention it here anyway. Watts is equal to Volts x Amps. So the graph below is the product of taking the data points from the red line above and multiplying each point with the from the white line. Below the green line is in Watts.