What stops generators from producing electricity/voltage? The loss of residual magnetism is the main reason why portable generators don't produce power. Electrical conductors are moved through a magnetic field by generators. Magnets are not present in your generator. By converting a portion of the generator's output voltage to direct current (DC) and feeding it to a coil to construct an electromagnet, the magnetic field is produced. Residual magnetism is the trace quantity of magnetism that remains after the generator has stopped operating. The meager amount of magnetism is sufficient to generate a tiny amount of electricity. An even stronger electromagnet can be made using this little electricity. Your generator generates even more power as the engine rotates this magnet, which moves its electric field through the stator windings. When the remaining magnetism is gone, the generator won't start up and produce any power. The loss of this residual magnetism might occur spont