The 12-volt DC generator can charge the battery.
1. If it is a multi-winding DC generator with rated voltage of 12v, the output voltage waveform is \"flat\" with the increase of the winding, and the maximum voltage range is 12v 10%, which can be charged for the 12v battery, but the termination charging voltage of the battery is 14.4v, so the battery is not fully charged.
2, generally commonly used DC generators are mostly AC waveform after full wave rectification, and AC after rectification to obtain DC basically consistent, rated voltage 12v AC rectification after the maximum voltage 12*1.414=17v theoretical value, with full bridge rectification minus about 2v diode voltage drop, there is still about 15v voltage, very suitable for battery charging.