A home generator keeps essential appliances running during power outages, protecting food, sump pumps, medical equipment, and HVAC systems. The wrong generator lacks the wattage for your essential loads, runs a noisy engine that disrupts neighbors, or skips the automatic transfer switch that prevents dangerous utility backfeed. Natural gas standby units run unlimited from utility hookup, while gasoline portables provide flexibility at lower upfront cost. After comparing 13 current home generators, these seven stood out for wattage delivery, transfer switch integration, and reliability.
Picks were narrowed by wattage, fuel type, automatic transfer switch availability, noise level, and warranty coverage.
Quick Comparison
| Generator | Type | Wattage | Fuel | ATS Included | Best for |
|---|---|---|---|---|---|
| Generac Guardian 22kW | Standby | 22000W | NG/LP | Yes | Overall |
| Champion 100925 | Portable | 9375W | Dual fuel | No | Portable |
| Westinghouse WGen9500DF | Portable | 9500W | Dual fuel | No | Budget portable |
| Briggs Stratton 20kW | Standby | 20000W | NG/LP | Yes | Budget standby |
| Kohler 26RCAL | Standby | 26000W | NG/LP | Yes | Premium |
| DuroMax XP12000EH | Portable | 12000W | Dual fuel | No | High wattage |
| Honda EU7000iS | Portable | 7000W | Gasoline | No | Quiet |
Generac Guardian 22kW, Best Overall
The Guardian 22kW powers most US homes including central AC, electric stove, and well pump on a single unit. Auto-detects power loss and starts within 10 seconds. Runs on natural gas or propane.
Includes 200 amp automatic transfer switch with smart load management. Wi-Fi monitoring through Mobile Link app. Quiet operation at 67 dB at 23 feet. Five year limited warranty.
Trade-off: 5,000 to 7,000 dollar installation cost on top of generator price. Worth it for whole-house coverage.
Champion 100925, Best Portable
The 100925 delivers 9,375 peak watts on dual fuel (gasoline or propane) at a moderate price point. CO Shield sensor detects carbon monoxide buildup and shuts down before dangerous levels. Electric start with remote.
Powers essential circuits plus a window AC unit through a transfer switch or interlock kit (purchased separately). 8 hour runtime on full tank.
Trade-off: requires manual setup and transfer switch installation. Plan 800 to 1,500 dollars extra for electrician work.
Westinghouse WGen9500DF, Best Budget Portable
The WGen9500DF delivers 9,500 peak watts on dual fuel at the lowest price for a name-brand portable in this wattage class. Electric start with remote and battery included. Three year warranty.
12 hour runtime on full 6.6 gallon gasoline tank. Transfer switch ready outlets.
Trade-off: 74 dB noise level louder than premium competitors. Acceptable for occasional outage use.
Briggs Stratton 20kW, Best Budget Standby
The Briggs Stratton 20kW provides whole-house standby power at the lowest price for a name-brand standby generator. Auto-start, 200 amp transfer switch included, and natural gas or propane operation.
Symphony II power management cycles loads to maximize available wattage. Five year limited warranty.
Trade-off: louder than Generac at 70 dB. Acceptable for rural properties, less ideal for tight suburban lots.
Kohler 26RCAL, Best Premium
The 26RCAL provides 26,000 watts on natural gas (24,000 on propane) for largest US homes with central AC, electric oven, well pump, and electric water heater simultaneously. Kohler engine and US-made construction.
200 amp automatic transfer switch, OnCue Plus monitoring with smartphone app, and PowerBoost feature for hard-starting loads. Five year warranty.
Trade-off: 12,000 to 15,000 dollar installed price. Worth it for large luxury homes with full electric loads.
DuroMax XP12000EH, Best High Wattage
The XP12000EH delivers 12,000 peak watts in a portable format on dual fuel. Powers more circuits than any other portable in this lineup, including a 5-ton central AC compressor on startup surge.
Electric start with remote, fuel selector, and idle control to reduce noise during low-load periods. Wheel kit for mobility.
Trade-off: 224 pound weight challenges single-person handling. Plan placement at the install location.
Honda EU7000iS, Best Quiet
The EU7000iS runs at 60 dB at 23 feet, the quietest portable in this lineup, using Honda's inverter technology that varies engine speed to match load. Clean sine wave output protects sensitive electronics.
7,000 watts continuous, electric start, fuel injection, and 18 hour runtime at 25 percent load. Three year warranty.
Trade-off: 4,000 to 5,000 dollar price. Premium for the quiet operation and Honda reliability.
How to choose
Standby for frequent outages
Standby generators auto-start and power whole house. Worth the investment for areas with multiple outages over 24 hours per year.
Portable for occasional outages
Portables work for short outages with essential circuits. Lower upfront cost but require manual setup.
Transfer switch is non-negotiable
Transfer switches prevent backfeed and protect lineworkers. Skip the extension cord routine.
Dual fuel for fuel flexibility
Dual fuel portables run on gasoline or propane, providing fuel security during shortages.
The home generator class covers backup power across portable essential-circuit and standby whole-house formats. Match the wattage to your essential loads, prioritize automatic transfer switches, and the generator will serve through the typical 20 to 30 year lifecycle.
Frequently asked questions
Standby or portable generator, which do I need?+
Standby generators run on natural gas or propane, start automatically within 10 seconds of power loss, and power whole-house essentials including HVAC. Portable generators run on gasoline, require manual setup with extension cords or interlock switches, and power 4 to 8 essential circuits. Standby costs 4,000 to 15,000 dollars installed. Portable costs 500 to 2,500 dollars. Pick standby for areas with frequent outages over 24 hours, medical equipment dependence, or work-from-home professionals. Pick portable for occasional outages under 12 hours.
How many watts do I need for my house?+
5,000 to 7,500 watts powers essentials (refrigerator, lights, sump pump, basic AC unit). 10,000 to 12,000 watts adds central AC or electric stove. 20,000 to 25,000 watts powers most whole-house loads. Calculate by adding running watts of essential appliances plus 30 percent margin for startup surges. A central air compressor draws 3,500 to 5,000 starting watts but 1,800 running watts. Check appliance labels for actual draw.
What is an automatic transfer switch?+
Automatic transfer switches detect utility power loss and switch the home to generator power within 10 seconds. They prevent backfeed into the utility grid (which can electrocute lineworkers) and protect appliances from voltage spikes during the transition. Standby generators include transfer switches in the installation package. Portable generator transfer switches cost 300 to 800 dollars plus electrician labor of 500 to 1,000 dollars to install. Without a transfer switch, portable generators require running individual extension cords to each appliance.
What fuel type is best for home generators?+
Natural gas is best for standby generators because it runs unlimited from utility hookup. Propane is the alternative when natural gas is unavailable, requiring a 500 to 1,000 gallon underground tank. Gasoline is best for portable generators because it's widely available, but storage is limited to 6 months before deterioration. Diesel handles long-duration commercial use but is rare for residential. Dual-fuel portable generators run on gasoline or propane, providing fuel flexibility during shortages.
How long do home generators last?+
Standby generators last 20 to 30 years of standby duty with annual maintenance. Run hours during outages are the wear factor, typically 100 to 500 hours per year. Portable generators last 1,000 to 3,000 hours depending on quality. Engine oil changes every 50 to 100 hours and air filter changes annually are critical. Spark plug failures cause most no-start issues and cost 5 to 15 dollars to fix. Annual professional service runs 200 to 400 dollars for standby units.
Taylor Quinn
Taylor Quinn writes for The Tested Hub.