Can I charge deep cycle or AGM lead acid / car battery with a bike generator?
Yes, a permanent magnet DC motor used as a pedal power bicycle generator can charge a lead acid deep cycle / car battery. Data captured using software from http://wattsview.com This graph shows you the battery charging Amp-Hours from a 40 year old casual rider who works out 2 to 3 times a week. The green trend line shows you that after a 20 minute workout, the total amp-hours reached 1.8 This took the Duracell Powerpack from a SOC (State of charge) of 10% to 30% while it had been powering a laptop data logger computer which consumes 20 Watts. This laptop was running the WattsVIEW software that recorded this data. To completely charge the Duracell Powerpack when it is dead, you would need to put in anywhere from 6 to 10 amp hours. Depending on how fast you ride. More info on charging lead acid batteries here. A a charge controller is recommended for lead acid battery charging as shown in the diagram below. One of the cheaper solutions you can try and use is the NC25A charge controller.
