Whole house generators are designed to provide backup power for an entire home or for a large group of essential circuits during an outage. They are commonly used to run refrigerators, freezers, lights, sump pumps, well pumps, furnace blowers, internet equipment, security systems, and selected large appliances. Some systems can also support central air conditioning, depending on generator size and load management.

There are two main options: portable high-watt generators and permanently installed standby generators. Portable models cost less and can be stored when not in use, but they require manual setup, fuel management, and a transfer switch or interlock kit. Standby generators are more expensive but can start automatically when the power goes out.

When shopping for a whole house generator, compare running watts, starting watts, fuel type, outlet options, noise level, runtime, transfer switch compatibility, and safety features. Dual fuel and tri-fuel portable generators are popular because they offer gasoline, propane, or natural gas flexibility.

Always size the generator around your actual home loads. For safe operation, never backfeed through a wall outlet. Use a properly installed transfer switch and run portable generators outdoors only, far away from windows, doors, garages, and vents.