The charging system has two jobs:

1. To put back into the battery the current used to start the engine
2. To handle the load of the lights, ignition, radio, and other electrical and electronic equipment while the engine is running.

The charging system includes the generator, regulator, and battery, with connecting wires.

The generator converts mechanical energy from the engine into electrical energy. It keeps the battery in a charged condition and handles electrical loads while the engine is running. The alternator produces alternating current (ac) inside the stator windings. Diodes convert this ac into direct current (dc).