The inability to be operated indoors due to regulatory issues and effects of pollution. Risks associated with carbon monoxide poisoning due to emissions. The need for regular maintenance. Handling gasoline which is a hazardous substance to have around the home. In addition, gasoline becomes stale after a few months.
Generators are expensive.
Poor voltage regulation on many generators can damage appliances. Many generators won't start a vehicle when its battery is dead. It provides safety features including accurate electronic voltage regulation. It can be used indoors or outdoors, anytime-anywhere. It jump-starts a vehicle without the need of another car.