Will 10kW run my whole house?

Usually not. It is sized for essential circuits such as the furnace, refrigerator, lights and well pump. A house with central air and electric appliances needs a larger unit or load management.

Does it run on natural gas or propane?

Both. It connects to your existing LP or natural gas supply, so there is no fuel to store or refill. Output differs slightly between the two fuels.

How fast does it start?

Generac rates it to start within seconds of sensing a utility outage, automatically, with no action from you.

Can I install it myself?

No. It needs a concrete pad, gas plumbing, electrical work and a transfer switch, all done by a licensed installer and typically permitted.

How often does it need service?

Generac advertises long service intervals for its class, but you still run a periodic self-test and change oil and filters on schedule.

Air-cooled generators are louder than liquid-cooled ones. Expect audible engine noise during an outage, so placement away from bedrooms matters.

Generac 10kW Air Cooled Home Standby Generator 7257

Best price now

$3,699.00at WalmartChecked Nov 11

Prices are checked against each store and labelled with when.

Visit Walmart

Generac 10kW Air Cooled Home Standby Generator 7257

Best price now

$3,699.00at WalmartChecked Nov 11

Prices are checked against each store and labelled with when.

Visit Walmart

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Price facts

Last seen at $3,699.00 at Walmart on Nov 11.

Our take on the Generac 10kW Air Cooled Home Standby Generator 7257

The Generac 7257 is a 10kW air-cooled home standby generator that runs on natural gas or LP and starts automatically within seconds of an outage. It is aimed at covering essential circuits rather than a whole house, which keeps it smaller and simpler than the larger liquid-cooled units. Generac is the best-selling standby brand in the US, and owners value the automatic operation and the nationwide dealer network. The trade-off is a 10kW ceiling: it will not carry central air plus a full panel of large loads at once, and air-cooled units are louder than liquid-cooled models.

Best forHomeowners who want automatic backup for essential circuitsHomes on natural gas or LP with a modest electrical loadBuyers who want a widely serviced, mainstream brandOutage-prone areas needing power within seconds, unattended

Pros

Starts automatically within seconds of a power loss
Runs on existing natural gas or LP supply, no refueling
10kW covers essentials such as furnace, fridge, lights and well pump
Long service intervals reduce maintenance visits
Nationwide dealer network and 24/7 support
Air-cooled design is simpler and cheaper to install than liquid-cooled

Cons

10kW will not run a whole house with central air and large appliances
Air-cooled engines are noticeably louder than liquid-cooled units
Requires professional installation, gas plumbing and a transfer switch
Needs a monthly self-test and periodic oil and filter changes

Generac 10kW Air Cooled Home Standby Generator 7257 prices at every store

WalmartNew
In stockSold by GENERAC POWER SYSTEMSReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$3,699.00Free shippingChecked Nov 11
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What reviewers say

Owners of Generac air-cooled standby units generally report reliable automatic starts and peace of mind during outages, with the brand's dealer coverage cited as a reason to buy. Complaints center on noise and on the limits of a 10kW rating when whole-house coverage is expected.

What people mention

Automatic startPraisedOwners say it kicks in on its own within seconds of an outage and runs until utility power returns.
NoiseCriticisedAir-cooled units are reported to be noticeably louder than liquid-cooled generators, especially near bedrooms.
CapacityMixed10kW is enough for essential circuits but owners warn it will not carry a whole house with central air.
MaintenanceMixedLong service intervals are a plus, but owners still note the monthly self-test and routine oil changes.
Dealer networkPraisedBuyers cite the wide dealer coverage and parts availability as a reason to choose Generac.

About the Generac 10kW Air Cooled Home Standby Generator 7257

The Generac 10kW Air Cooled Home Standby Generator (model 7257) is an automatic backup power system for a home. It connects to an existing LP or natural gas fuel supply. When it senses a loss of utility power, it starts within seconds on its own.

It runs for as long as needed until utility power returns. Generators in this line can cover essential circuits only or the whole house. The engine is air cooled, and the unit has long service intervals to keep maintenance to a minimum.

Power output: 10 kW
Cooling: Air cooled
Fuel: LP or natural gas, from an existing supply
Start-up: Automatic, within seconds of sensing power loss
Model: 7257
Color: Gray

Specifications

color: GraySource

Questions and answers

Will 10kW run my whole house?: Usually not. It is sized for essential circuits such as the furnace, refrigerator, lights and well pump. A house with central air and electric appliances needs a larger unit or load management.
Does it run on natural gas or propane?: Both. It connects to your existing LP or natural gas supply, so there is no fuel to store or refill. Output differs slightly between the two fuels.
How fast does it start?: Generac rates it to start within seconds of sensing a utility outage, automatically, with no action from you.
Can I install it myself?: No. It needs a concrete pad, gas plumbing, electrical work and a transfer switch, all done by a licensed installer and typically permitted.
How often does it need service?: Generac advertises long service intervals for its class, but you still run a periodic self-test and change oil and filters on schedule.
Is it loud?: Air-cooled generators are louder than liquid-cooled ones. Expect audible engine noise during an outage, so placement away from bedrooms matters.
Where is the Generac 10kW Air Cooled Home Standby Generator 7257 cheapest?: At Walmart, for $3,699.00, as of our latest check.