Generator — General Information (Peugeot 207)

The alternator supplies current to the components that use electricity when the engine is running and maintains the battery charge. The alternator's output depends on the engine speed. When the engine is idling, the alternator operates at approximately half its maximum output. When the engine is idling but many components that use electricity are running, the alternator's output may not be sufficient to maintain a full charge of the battery. In cold conditions, the battery's ability to recharge is lower than in warmer temperatures. This means that when the engine is idling for a long period of time and many components that use electricity are running, the battery may become discharged.

If the alternator charging is disabled, the vehicle's power-consuming components are powered only by the battery, which can also lead to battery discharge.

The generator produces alternating current, which becomes direct current thanks to the generator's rectifier unit.

The rectifier unit is equipped with a built-in charging regulator.

(Source can be seen at: PEUGEOTBOOK.ru)