A portable generator is a movable unit that you set up and start by hand during an outage, while a standby generator is permanently installed outside the home and connected through transfer equipment, often starting automatically when utility power fails. Standby systems usually offer more capacity and convenience, while portable generators cost less up front but require more effort and care.
Both need safe placement and proper electrical connections.
Equipment Type and Backup Capacity
Portable generators range from small units for a few appliances to larger models that can supply several circuits. They are typically stored when not in use and wheeled outside during an outage.
Standby generators are mounted outdoors on a pad and connected to the home’s electrical system and fuel supply. They are often larger and can be sized for key circuits or most of the home, depending on the model and installation. Because they are permanent, standby systems are usually planned together with the transfer equipment and fuel supply.
Manual Versus Automatic Operation
A portable generator must be moved into place, fueled and started by hand, then connected to the home or appliances. When power returns, it must be shut down and disconnected.
Many standby generators use an automatic transfer switch. When utility power fails, the generator starts and the transfer switch moves selected circuits to generator power. When utility power returns, the system switches back. Not every standby setup is automatic, so the transfer equipment determines how it operates.
Transfer Equipment, Fuel and Maintenance
Either type must connect to home wiring only through approved transfer or interconnection equipment. For portable units, that usually means an outdoor power inlet and a manual transfer switch or approved interlock. Plugging a generator into a household outlet is dangerous and can backfeed utility lines.
Portable generators often run on gasoline that must be stored and refilled. Standby generators commonly use natural gas or propane supplied by a permanent connection. Both need regular maintenance and exercise runs to stay ready. Stored fuel should be kept in approved containers away from living spaces.
Placement and Carbon Monoxide Safety
Fuel-burning generators produce carbon monoxide, which can be deadly. The U.S. Consumer Product Safety Commission advises operating portable generators outside only, at least 20 feet from the house, and never in a home or garage, even with doors and windows open. Standby units must be installed outdoors following the manufacturer’s clearance requirements. CO alarms inside the home add another layer of protection.
Installation of either connection type involves the electrical panel and should be done by a qualified electrician. Standby installations also involve fuel connections that must follow the manufacturer’s instructions and applicable requirements in Utah.
If you are choosing between portable and standby backup power in Salt Lake City, our generator installation services can explain both options and how each would connect to your home.