A petrol generator is a portable power source that uses gasoline as fuel to generate electricity. It consists of an engine that drives a generator to produce power. Petrol generators are commonly used as a backup power source in case of power outages, as well as for outdoor activities such as camping or construction work. They come in different sizes and power outputs, and can be used to power a wide range of electrical devices. However, they can be noisy, emit fumes and require regular maintenance to ensure safe and efficient operation.