Powered by diesel or gas, portable generators provide temporary electricity up to certain level of wattage. These generators are generally used by residents and businesses to keep the vital appliances operating during a power cut. Stringent regulations by government in various countries to reduce toxic emissions is encouraging manufacturers to focus on developing gas generators instead of diesel generators. As compared to diesel generators, gas generators emit very less amount of pollution and also operate silently. Manufacturers have also started focusing on developing bi-fuel portable generators. As these generators lead to low gas emission and save cost. Meanwhile, tri-fuel portable generators are also being developed as they can run on gasoline, natural gas as well as liquid propane.