Over 80 percent of US households experience at least one power outage per year, and the duration of those outages has been trending upward. Choosing the best generator for your home means matching the right type, wattage, and fuel source to your specific needs — whether that is keeping a refrigerator running for a few hours or powering your entire house through a multi-day ice storm.
Three Types of Home Generators
Generators fall into three broad categories, each with distinct advantages.
- Portable generators — open-frame units running on gasoline, propane, or both. Output ranges from 3,000 to 12,000 watts. Prices start at $400 and climb to $1,800. They must be stored outdoors and connected via extension cords or a transfer switch.
- Inverter generators — compact, fuel-efficient, and quiet (53-62 dB). They produce clean power safe for sensitive electronics. Output caps around 3,500 watts for single units, though parallel kits double capacity. Price range: $500 to $1,500.
- Standby generators — permanently installed units that run on natural gas or propane and turn on automatically within 10 to 30 seconds of an outage. Whole-house models deliver 10,000 to 26,000 watts. Installed cost: $5,000 to $15,000.
Top Portable Generators
Champion 4375/3500-Watt Dual Fuel
Champion consistently ranks as the best value in portable generators. This model delivers 3,500 running watts on gasoline, weighs 119 pounds, and includes an electric start. Dual fuel capability adds propane flexibility. Street price sits around $530, making it tough to beat for occasional outage protection.
Westinghouse WGen9500DF
For homeowners who need to power a well pump, electric range, or large window AC units, the WGen9500DF delivers 9,500 running watts. Transfer-switch-ready outlets, remote electric start, and a 6.6-gallon tank provide about 12 hours of runtime at half load. Expect to pay roughly $1,100.
Top Inverter Generators
Honda EU2200i
The gold standard for inverter generators. At 47 pounds, it is easy to carry and produces only 48 to 57 dB. Output tops at 2,200 starting watts. Honda’s reliability is legendary — these units routinely last 1,000+ hours with basic maintenance. Price: around $1,150.
Champion 3400-Watt Inverter
More power than the Honda at a lower price ($1,100), though slightly louder at 59 dB. Dual fuel operation, wireless remote start, and parallel-ready ports make this the best generator pick for tailgating, camping, and moderate home backup duty.
Top Standby Generators
Generac Guardian 22kW
Generac owns roughly 75 percent of the residential standby market. The Guardian 22kW model powers an entire 2,500-square-foot home including central AC. It runs on natural gas or propane, starts automatically, and includes Wi-Fi monitoring through the Mobile Link app. Installed cost averages $7,000 to $9,000 depending on your region and gas line requirements.
Briggs and Stratton 12kW
A more affordable standby option at $4,500 to $6,500 installed. The 12kW output covers essential circuits — refrigerator, furnace, sump pump, lights, and a few outlets. Symphony II power management automatically prioritizes loads so you get the most from available wattage.
How to Size a Generator for Your Home
List every appliance you need during an outage and note its running wattage. Here is a quick reference for common loads.
- Refrigerator: 150 watts
- Chest freezer: 100 watts
- Sump pump: 800 watts
- Gas furnace blower: 500 watts
- Window AC (10,000 BTU): 1,200 watts
- Well pump (1/2 HP): 1,000 watts
- Lights and charging: 200-400 watts
Add 20 percent to your total for starting surges. If your essentials total 3,000 watts, target a generator rated for at least 3,600 running watts.
Fuel Types Compared
Gasoline is widely available but degrades within 30 to 60 days without stabilizer. Propane stores indefinitely and burns cleaner, extending oil change intervals. Natural gas feeds standby units directly from the utility line — you never run out as long as the gas supply is active, which it usually is during electrical outages.
Diesel generators are rare for residential use but offer the best fuel efficiency at higher wattage. They are louder and heavier, making them impractical for most homeowners.
Safety and Installation Essentials
Portable generators must run outdoors, at least 20 feet from any opening in the home. Carbon monoxide detectors on every floor of the house are non-negotiable. A transfer switch ($200 to $500 for a manual unit, plus electrician labor) prevents backfeeding into the grid, which is both illegal and life-threatening to utility workers.
Standby generators require a concrete pad, a fuel connection, and a 200-amp automatic transfer switch. Permit requirements vary by municipality, so check local codes before installation. Total install time for a standby unit is typically one to two days.
Maintenance Schedule
- Run portable generators for 15 minutes monthly to circulate oil and prevent carburetor gumming.
- Change oil after the first 25 hours, then every 50 to 100 hours.
- Replace spark plugs annually or every 200 hours.
- Standby generators run a self-test cycle weekly. Schedule professional service annually, typically $200 to $350.
A well-maintained portable generator lasts 2,000 to 3,000 hours. Standby units with proper service routinely hit 10,000 hours or more.
