AB Gensets full line of natural gas generator sets are built with top-quality brushless revolving field alternators providing 1% automatic voltage regulation from 10 to 600 kW. These are directly coupled to a heavy-duty 4-cycle generator drive spec engine and mounted on a solid welded C-channel base frame with rubber isolators to minimize vibration. Each set is factory tested at 100% load to ensure that they are capable of the advertised output and that the governor drop is no more than 3% from no load to full load.