It is programmable, just like a remote control almost. It
safeguards both the engine and the batteries, and provides
smooth control of the motor in any circumstance. It works
great.
We have put together a comprehensive list of motor
controller suppliers for you. If you are the least bit handy you
can use a salvaged controller available at your industrial
scrap yard.
Where to find controllers-
http://www.electricvehiclesusa.com/category_s/140.htm
http://www.grassrootsev.com/control.htm
http://cafeelectric.com/products/price/
http://www.metricmind.com/index1.htm
BatteriesYour battery bank is truly the heart of your electric car
system. Batteries are used to store DC electricity during your
daily charging cycle for use at a future time.
Choosing your batteries is a very critical decision in
designing your electric car. If your battery bank is too small
then your system will not perform well and your batteries
will have a very short life. If your battery bank is too large it
will be difficult to maintain a full charge, again resulting in
poor system performance.