I have some small motors (from my sons RC cars) spinning from mini windmills and hydro power. They are generating about 2.1 volts at about 1 amp*.
Is this sufficient to "trickle" charge a 12 volt battery? Or does the voltage HAVE to be higher than 12 volts so the battery doesn't try to reverse spin my motors? If so, can I "add" the volts of the motors/generators up to make them over 12? I have read a Battery University that 14.40 is recommended for a 12 volt but I can't find anywhere that says lower than 12 will not work. IF it just takes longer, fine.
Thanks,
Peter
*(I say about 1 amp because I plugged my 2.1 DC volts and 1.4 ohms into a ohms law calculator on a website) Do I just attach my multimeter to the 2 leads of the motor while it's not runing to get the resistance)
Is this sufficient to "trickle" charge a 12 volt battery? Or does the voltage HAVE to be higher than 12 volts so the battery doesn't try to reverse spin my motors? If so, can I "add" the volts of the motors/generators up to make them over 12? I have read a Battery University that 14.40 is recommended for a 12 volt but I can't find anywhere that says lower than 12 will not work. IF it just takes longer, fine.
Thanks,
Peter
*(I say about 1 amp because I plugged my 2.1 DC volts and 1.4 ohms into a ohms law calculator on a website) Do I just attach my multimeter to the 2 leads of the motor while it's not runing to get the resistance)