Generac Generators

Pricing a Generac? See unit and installed costs for every size →

Generac has 12 units on Outage Geek, priced from $599 to $24,000. The least expensive Generac model here is the Generac GP3300i at $599, and the lineup below runs cheapest first.

~$599

Inverter Generator · Gasoline

Generac GP3300i

Generac's play for the Honda EU2200i shopper who balks at $1,200: 2,500 running watts (700 more than the Honda), PowerRush surge tech, USB ports, and COsense CO shutdown for roughly half the money, in a 60-lb suitcase. What to know: Generac doesn't publish a noise spec, the 1-gallon tank is small, and the 3-year warranty runs through Generac's dealer network. A rational value pick if ultimate quiet isn't the goal.

2,500 W / 3,300 W surge · up to fridge, freezer and the essentials

running: 2,500 W

Best for Budget campers who want more watts than an EU2200i for half the price and accept more noise.

Full spec sheet Check price on Amazon

~$979

Portable Generator · Gasoline

Generac GP8000E COsense

The big-box storm generator: when a hurricane is three days out, this is what's stacked on pallets at Home Depot, and that availability is genuinely part of its value. 8,000 running watts, 10,000 starting via PowerRush, electric start, COsense shutdown, and an L14-30R for interlock feeding — a complete storm kit under $1,000 from a brand every service shop knows. Owner reports are solid on power delivery: it carries household essentials for days through an interlock or transfer switch. On the debit side: it's an open-frame roarer (Generac publishes no dB figure), UPS units often reject its non-inverter output, it's gasoline-only with a thirsty 420cc engine, and Generac portables were hit by recalls (2022 handle pinch; an April 2026 carburetor fuel-leak recall on certain GP units) — check your serial. One owner got six years from his on a manual transfer switch before a winter no-start ended in a carb rebuild.

8,000 W / 10,000 W surge · up to well pump or a small central AC

running: 8,000 W
Transfer switch: transfer-switch ready

Best for Storm-prep buyers who want maximum conventional watts from a big-box store the week before landfall.

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~$999

Portable Generator · Gasoline

Generac GP6500 COsense

A middle-weight open-frame that fits a manual transfer switch or interlock cleanly: the L14-30R twist-lock outlet takes a standard 30-amp inlet, and 6,500 running watts handles a furnace, fridge, sump and well pump with room to spare. COsense, Generac's carbon monoxide shutdown, is standard, which matters because most portable-generator deaths come from running one too close to the house. PowerRush raises the starting capacity to 8,125 watts so a well pump or small AC is less likely to stall it. The sheet gives no decibel figure, which is a flag in itself, and owners describe it as a typical loud open frame. Gasoline only means stale fuel and carburetor gumming if it sits, so anyone buying for storm backup should plan on stabilizer and a yearly run. At $999 it undercuts the 7,500 W Westinghouse and costs about what other 6,500 to 7,500 W open frames do, with the brand's dealer and parts network as the extra.

6,500 W / 8,125 W surge · up to furnace blower, sump pump or a window AC

running: 6,500 W
Transfer switch: transfer-switch ready

Best for Homeowners with a 30-amp transfer inlet who want a mid-size gasoline generator with CO shutdown and a national parts network.

Full spec sheet

~$1,249

Inverter Generator · Gasoline · 52 dB

Generac iQ3500

Generac's premium inverter was built to beat Honda's EU3000iS on paper — more starting watts, electric start, a PowerDial that combines start/run/stop in one twist, and a digital dashboard showing watts and runtime — and owners who have one call it super quiet, against a 50-52 dB rating. It starts 13.5k RV ACs and the 30A L5-30R twist-lock feeds RV adapters cleanly. The persistent owner complaint: 109 pounds with no wheels and only two handles, so moving it solo is miserable and owners bolt on a wheel kit, factory or homemade. The carburetor also wants running dry before storage, and a 2023-era recall covered certain units (stator faults causing fire risk), though current production is clear. At street prices near $1,250 it undercuts what the equivalent Honda cost by nearly half.

3,000 W / 3,500 W surge · up to fridge, freezer and the essentials

running: 3,000 W

Best for Buyers who want EU3000-class quiet and power with modern controls for far less money.

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~$4,399

Portable Generator · Gasoline

Generac GP18000EFI COsense

The biggest portable Generac sells, built for the buyer who wants to run a whole house, central air included, from a 50-amp transfer switch without buying a standby unit. The 816cc engine uses electronic fuel injection, which owners value for easier cold starts and less carburetor trouble after a season in storage, and the 14-50R receptacle plus 22,500 watts of starting capacity can start a 4 to 5 ton AC. THD under 5% means the output is clean enough for electronics. It also weighs about 443 lbs, burns through its 14.2 gallon tank in about nine hours at half load, and has no published noise figure, so expect it to be loud next to a neighbor's fence. At $4,399 it costs about the same as a Guardian 14kW before the transfer switch, so the real question is whether you will wheel it out and refuel it in a storm. The 50-state version is the one on the maker's current page.

18,000 W / 22,500 W surge · up to whole home with central air

running: 18,000 W
Transfer switch: transfer-switch ready

Best for Owners of large homes who want whole-house portable power through a 50-amp transfer switch and are willing to refuel it by hand.

Full spec sheet Check price on Amazon

~$4,619

Home Standby Generator · NG/LP · 61 dB

Generac Guardian 10kW

The entry point to the Guardian line, and the one bought for smaller homes with a short essentials list because it bundles a 100-amp, 16-circuit transfer switch in the box. The 460cc G-Force 400 engine covers essentials — furnace, fridge, well pump, some lights — not whole-house AC. At 61 dB it's the quietest Guardian. The battery, oil, and some setup parts aren't included, and warranty service depends entirely on how good your local Generac dealer is. Budget for install — most people pay more for wiring and gas work than for the unit.

10,000 W · up to well pump or a small central AC

running: 10,000 W
Transfer switch: transfer-switch ready

Best for Smaller homes that want automatic backup for essential circuits without paying whole-house prices.

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~$4,889

Home Standby Generator · NG/LP · 65 dB

Generac Guardian 14kW

The 14kW is the sweet spot Guardian for mid-size homes: it steps up to the 816cc twin-cylinder G-Force 800 engine, holds 14kW on both propane and natural gas, and will start a modest central AC with load management. This 7223 SKU is the bare generator; pair it with a 100A or 200A switch, and get quotes, because installed cost typically lands at double the hardware price.

14,000 W · up to well pump or a small central AC

running: 14,000 W
Transfer switch: transfer-switch ready

Best for Mid-size homes that want essential circuits plus one air conditioner covered automatically.

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~$5,279

Home Standby Generator · NG/LP · 65 dB

Generac Guardian 18kW

The 18kW is the value pick in the Guardian range on a dollars-per-kilowatt basis — same 816cc G-Force 800 twin as the 14kW, tuned for 18kW on propane and 17kW on natural gas, at only a few hundred dollars more. One owner's first real outage went as advertised, with the central AC starting on no more than a flicker of the lights, and the G-Flex variable-speed exercise keeps the weekly test tolerable at 65 dB. The ownership caveats are pure Generac: dealers are the only sanctioned path for warranty work, and the battery and cold-weather kit are extras to budget for up front. If you're between the 14 and this, most owner advice says spend up.

18,000 W · up to whole home with central air

running: 18,000 W
Transfer switch: transfer-switch ready

Best for Average-size homes that want near-whole-house coverage at the lowest cost per kilowatt.

Full spec sheet

~$5,999

Home Standby Generator · NG/LP · 67 dB

Generac Guardian 22kW

For years the best-selling home standby generator in America, and the sheer volume of owner reviews shows why: the 22kW carries most whole homes — two AC units with load management — and every electrician and gas fitter in the country has installed one. The G-Force 1000 engine and 67 dB noise level are unremarkable but proven; owners report units carrying whole houses through multi-day storm outages. The newer 24kW (7209/7210) has largely replaced it at similar money, but the 7042 remains widely stocked, slightly cheaper, and the known quantity — a big deal when your installer has done fifty of them.

22,000 W · up to whole home with central air

running: 22,000 W
Transfer switch: transfer-switch ready

Best for Whole-house backup buyers who want the most-installed, most-understood generator on the market.

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~$6,849

Home Standby Generator · NG/LP · 67 dB

Generac Guardian 26kW

The biggest air-cooled generator Generac makes, and the one owners of large homes buy to avoid stepping up to liquid-cooled money. 26kW on propane (22.5kW on natural gas) with a redesigned alternator delivering 230 LRA of starting grunt means dual 5-ton AC setups are realistic with load management. It's 'smart grid ready' and runs the same Evolution 2 controller and Mobile Link stack as the rest of the line. Generac claims 68% less space than comparable output, and the service ecosystem is familiar; the trade-offs are the usual dealer-dependent warranty service, the meaningful NG derate, and 67 dB of noise that a big home's yard absorbs better than a small lot does.

26,000 W · up to whole home with central air

running: 26,000 W
Transfer switch: transfer-switch ready

Best for Large homes with heavy AC loads that want maximum air-cooled power before liquid-cooled prices kick in.

Full spec sheet Check price on Amazon

~$7,249

Home Standby Generator · NG/LP · 67 dB

Generac Guardian 24kW

Generac's current volume flagship: 24kW on propane and 21kW on natural gas from the G-Force 1000 platform, bundled here with a 200-amp service-entrance transfer switch with PWRview energy monitoring. It's pitched as the 22kW's replacement, squeezing 2.6x the power of the baseline air-cooled units from the same-size enclosure. Real-world reports are mostly strong, with noise at 67 dB under load and a much quieter 57 dB Quiet-Test. The complaints are familiar: dealer-network variability makes your installer choice as important as the machine, and turnkey quotes for the same box differ by thousands. Ships as a complete package, which simplifies quotes compared to the à-la-carte SKUs.

24,000 W · up to whole home with central air

running: 24,000 W
Transfer switch: transfer-switch ready

Best for Larger homes that want a complete whole-house package with the transfer switch in the box.

Full spec sheet Check price on Amazon

~$24,000

Home Battery System · Battery

Generac PWRcell 2

The generator company's modular battery play: a cabinet holding three to six 3kWh modules (9-18kWh), so you can start small and slot in ~$2,500 modules later - a genuinely different upgrade path from fixed-capacity rivals. Price shown is estimated installed cost for a full 18kWh cabinet; a 9kWh starter system runs $17,000-21,000 installed, which is expensive per kWh next to a Powerwall 3. Where it earns its keep is ecosystem: PWRmanager load management sheds circuits automatically, it integrates cleanly with Generac standby generators for indefinite outages, and every system ships with an Ecobee smart thermostat. The baggage: failures of the SnapRS rapid-shutdown devices in first-generation PWRcell systems left Generac's battery line with a reliability reputation to rebuild, and dealer-only pricing makes apples-to-apples quotes difficult.

10,500 W · up to well pump or a small central AC

capacity: 18,000 Wh
expands to: 36,000 Wh
Transfer switch: transfer-switch ready

Best for Generac-generator households that want battery + generator orchestration from one dealer.

Full spec sheet