Apart from providing power backup, it serves a wide variety of purposes like powering electrical appliances with high wattage, powering a huge number of low wattage lights when you have an outdoor event, and many more. These are to name a few. And if it is a portable generator it can serve a huge benefit to someone who is faced with some serious disaster such as situations which restricts people from using the main source of electricity or simply be used by somebody who needs to power up some lights in areas that have no access to electricity