When the power goes out, a backup generator keeps your lights on, your refrigerator running, and your family safe. But not all generators are created equal. Understanding the types of home generators is the first step to choosing the right solution for your home.
Portable Generators: These are the most affordable option. A portable generator is a wheeled unit that you roll out during an outage, connect to appliances with extension cords or a manual transfer switch, and refuel with gasoline or propane. Pros: Low upfront cost ($500–$2,000), versatile for other uses like camping or tailgating. Cons: Manual operation required, limited power output (typically 3,000–10,000 watts), must be run outdoors due to carbon monoxide risk, and cannot power hardwired systems like central AC or well pumps without special setup.
Standby Generators (Whole‑Home): These are permanently installed units that sit outside your home like an AC condenser. They connect directly to your home’s electrical panel and fuel supply (natural gas or propane). When the power goes out, a standby generator automatically starts within seconds—even if you’re not home. Pros: Automatic operation, can power your entire home, no refueling needed, adds home value. Cons: Higher cost ($5,000–$15,000+ installed), requires professional installation. For cost details, see our home generator installation cost guide.
Inverter Generators: These are a type of portable generator that produces cleaner, more stable power, making them safe for sensitive electronics. They’re quieter and more fuel‑efficient than conventional portables. Pros: Safe for electronics, quiet, efficient. Cons: More expensive than standard portables, still limited in power output.
Which Type Is Right for You? If you want true hands‑off backup power for your entire home, a standby generator is the gold standard. If you need occasional, budget‑friendly power for essential items, a portable or inverter generator may suffice. For help determining what size you need, see our generator sizing guide. For choosing the right installer for a standby unit, see how to choose a licensed generator installer. And for keeping your generator running reliably, see generator maintenance tips. To understand fuel options, see generator fuel comparison.