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How Much Does a Whole-House Generator Cost?
Fuel generators span $999 to $6,499; portable and mid-size backup models sit around $1,399, while the bigger standby-capable units climb to the upper end of that range before any installation is figured in.
Running wattage and fuel type are the main drivers of a generator's price, with portable gas models occupying the low end and the larger standby-capable units the high end. Whole-house standby setups also call for professional electrical work, billed apart from the generator itself.
Price by type
| Type | Typical price | Notes |
|---|---|---|
| Portable generator (small wattage) | $999–$1,399 | Covers essentials like a fridge, lights, and a sump pump during an outage. |
| Mid-size portable generator | $1,399–$2,800 | The most common backup unit, powering multiple circuits or a small workshop. |
| Large portable/dual-fuel generator | $2,800–$4,500 | Higher running wattage for larger homes or job sites needing more simultaneous power. |
| Standby-capable/highest-output unit | $4,500–$6,499 | Highest wattage in the lineup, suited to near-whole-house backup before installation costs. |
What affects the price
Running wattage
Higher continuous wattage output raises price since it needs a larger engine and alternator.
Fuel type
Dual-fuel (gas/propane) units typically cost more than single-fuel gas models of similar output.
Portable vs standby-ready
Units built for permanent standby installation with automatic transfer switch compatibility cost more.
Noise reduction and inverter technology
Quieter inverter generators with cleaner power output for electronics add to the price.
Professional installation (additional)
With whole-house standby setups, the professional electrical installation, transfer switch, and permitting generally add several thousand dollars beyond the equipment price and fall outside the ranges shown above.
Bottom line
For essential circuits, a mid-size portable generator between $1,399 and $2,800 handles most home backup situations. Should you want genuine whole-house standby coverage, plan on a higher-output model in the $4,500-$6,499 range plus several thousand dollars in separate professional installation.
Shop GeneratorsCost FAQs
Does the generator price include installation?
No -- what's shown in the $999-$6,499 range is the generator alone. A licensed professional handles whole-house standby installation, including the transfer switch and electrical work, which usually adds several thousand dollars on top.
What size generator do I need to power my whole house?
That comes down to the home's overall electrical load, though the top-output standby-capable units running $4,500 to $6,499 are designed for near-whole-house coverage -- a licensed electrician can pin down the exact wattage you'll need.
Is a portable generator cheaper than a standby generator?
Yes -- portable generators begin near $999 and handle essential circuits, whereas whole-house coverage calls for standby-capable units around $4,500-$6,499 plus the cost of installation.
Prices shown are item prices from Station Containers; freight delivery is quoted to your ZIP at checkout.