So let’s go to Ebay. Just use the blue text link and you are
there. Remember that you have to be connected to the
internet for this to work.
Here is what you are looking for, and how to find it.
You are looking for a surplus permanent magnet DC motor
to be used as a power generator. The attributes you will have
to pay attention to are RPM, shaft size, amps and voltage. All
of these will be explained in full as we go along.
The photo above shows the very first DC motor we bought
from Ebay, it was 72 volts and cost us a mere $42 with
shipping included. Awesome!
The best motor (made by Ametek) is a 99 volt DC motor that
works great. Unfortunately, they are almost impossible to
locate these days. There are a lot of other Ametek motors
around though. So let’s start there.
So what you are looking for is a motor that is rated for high
DC voltage, low rpms and high current. You want a motor
that will put out over 12 Volts at a fairly low rpm, and a
useful level of current.
So shop for motors accordingly.