Best Generator for Home Backup
This class of generator is sized for a manual transfer switch backing up several household circuits at once — a well pump, furnace blower, refrigerator, and possibly central AC. Getting the wattage right here means checking your central AC compressor's actual LRA rating, not just the box's headline number, and planning for a louder, unverified noise rating than the inverter-class units elsewhere on this site.
The one thing to know: For central air conditioners specifically, don't guess the surge — the compressor's data plate lists LRA (Locked Rotor Amps), the actual current draw the moment the motor is stalled at power-on. Multiply LRA by voltage and a ~1.2 safety margin (LRA x V x 1.2) to get a real starting-watt estimate; a unit with 60A LRA at 240V needs roughly 17,000 surge watts to start, which is why central AC is usually the single hardest appliance to add to a portable generator plan without a soft-start device.
Rough price bands only (no exact figures — check current Amazon pricing): mid-to-premium roughly $700-$1,200, premium high-output roughly $1,200+.
Our picks — sized for transfer-switch backup, not portable convenience
Research-based picks (how we evaluate), compiled from manufacturer specs and generator-sizing references, not hands-on load/sound testing. Live Amazon search links, no prices or ratings, an honest drawback on each.
DuroMax XP12000EH
12,000W starting / 9,500W rated, dual fuel, electric start, dB(A) claims in the 70s per aggregator sources, no consistently published test distance
Enough continuous wattage to run a central AC compressor alongside a fridge and other household loads through a transfer switch, which most portable units cannot do.
Best for: Homeowners wiring a manual transfer switch to back up most of a panel, not just a few circuits
Watch out: At this output class, a licensed electrician and a transfer switch are the safe, code-compliant way to connect to your home wiring — never back-feed a panel through a regular outlet. It is also loud (high-70s dB(A) territory per third-party reports) and heavy, and its noise figure has no consistently stated test distance to verify against.
Check price on AmazonGenerac GP8000E
10,000W starting / 8,000W rated, gasoline, electric start, dB(A) claims vary by source, no consistently published test distance
A recognizable brand name with wide parts and service availability, sized for backing up several major circuits (well pump, furnace blower, refrigerator, some lighting).
Best for: Buyers wanting a mid-size, gasoline-only backup unit from a widely serviced brand
Watch out: Gasoline-only means no propane storage-life advantage, and like most conventional (non-inverter) generators in this class, published dB(A) figures are inconsistent across sources and rarely tied to a stated test distance — assume it will be loud and plan placement accordingly.
Check price on AmazonDuroMax XP13000HX
13,000W starting / 10,500W rated, dual fuel, electric start with battery, dB(A) claims in the 70s per aggregator sources
One of the higher continuous-wattage portable units available, with enough headroom for a central AC startup surge per the Startup Watt Index guidance (verify against your unit's actual LRA).
Best for: Larger homes or well/central-AC combinations that exceed what a 8,000-9,500W unit can start
Watch out: This is a large, heavy, loud conventional generator meant for outdoor placement well away from windows and doors — carbon monoxide risk scales with engine size, so ventilation and distance from the house matter even more at this class. Always size against your panel's actual loads with an electrician, not just the box's headline number.
Check price on AmazonFrequently Asked Questions
Roughly speaking: mid-size units (8,000-10,000W) sit in a mid-to-premium band, and the highest-output units (12,000-13,000W) sit in the premium band. Check current Amazon pricing directly — we don't publish exact prices since they change constantly.
For backing up your home's wiring (versus running extension cords to individual appliances), yes — a manual or automatic transfer switch installed by a licensed electrician is the safe, code-compliant way to connect a generator to your panel. Never back-feed a panel through a regular wall outlet.
Some, depending on your specific compressor's LRA rating — see our LRA sizing explainer before assuming any single model here covers your central AC. A soft-start device on the compressor can bring the requirement down within reach of a lower-output unit in this list.
Generally yes — units in this output class are conventional (non-inverter) generators with correspondingly higher noise output, and none of the models here have a manufacturer-stated test distance we could verify, so treat published dB(A) figures as rough indicators only. See our full noise-normalization index and placement-safety guide before choosing a spot to run one.