Use a multimeter to measure the battery voltage. The battery voltage measured before starting is usually 24 V. After starting, the voltage increases significantly to 26-28 V, which proves that the generator is producing electricity.
Never use a fire to check if the generator is producing electricity. Today's generators all use integrated circuit regulators. A fire will damage the generator regulator.
If the motor's phase line is shorted, it will sink because all three input phase lines are shorted, meaning the motor's electricity is also shorted. A corresponding magnetic field will also be short-circuited. be generated inside the engine, so it will be heavy. Because the battery motor itself has a strong magnet inside, it can be used as a generator when turned on, it becomes a motor et when rotated it becomes a generator.