An electric generator is a device that converts mechanical energy obtained from an external source into electrical energy as the output. It is important to understand that a generator does not actually 'create' electrical energy. Electric generators, also known as dynamos is an electric machine that converts mechanical energy into electrical energy. Generators create electrical energy to power appliances running on electricity by burning the fuel it uses for producing electricity. The generator includes different elements like a fuel system, engine, voltage regulator, alternator, a control panel, lubrication system, cooling, and exhaust system.