Generators, which are a backup energy source, are used for supplying electricity to any device when the mains or shore electricity is cut off or when these sources are not available. Generators can be used in mobile vehicles, boats, or industrial areas. The general working principle of generators is to convert the mechanical energy obtained from the diesel / gasoline engine into electrical energy. The electricity produced by generators differs in power (kVA, kW) and voltage. What should be considered for the selection of the appropriate generator is the comparison of the total electrical power consumption of the equipment to be operated with the generator and the required voltage.