Gasoline Generators are also known as Petrol Generators. The generators which use petrol as fuel to run their engine are known as Petrol Generators. Petrol engines are used to convert the chemical energy of petrol into mechanical energy. Power output may vary with respect to different generator models available in the market. Power requirements as low as 2.1 kW (or even less) and going up as high as 500 kW and above can be met by petrol generators.