The YANAN SLG brushless alternator is applicable for paralleling with mains or other generator sets. This brushless apparatus functions to assure a low radio and a low frequency protection. This device is equipped with a high capacity base mounted fuel tank with a standard fuel tank size for a minimum operation time of 10 hours at full load. In addition to the said details, this device has an anti-vibration pad that are fixed between engine alternator feet and the base frame.