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How Much Does a Whole-House Generator Cost?
Fuel generators run $999 to $6,499, with portable and mid-size backup units around $1,399, while larger standby-capable units reach the top of the range before installation costs.
Generator price depends mainly on running wattage and fuel type, with portable gas units at the low end and larger standby-capable units at the high end. Whole-house standby installations also need professional electrical work priced separately from the unit 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)
For whole-house standby setups, professional electrical installation, transfer switch, and permitting typically add several thousand dollars on top of the unit price and aren't included in the ranges above.
Bottom line
A mid-size portable generator in the $1,399-$2,800 range covers most home backup needs for essential circuits. If you want true whole-house standby coverage, budget for a higher-output unit near $4,500-$6,499 plus several thousand dollars in separate professional installation costs.
Shop GeneratorsCost FAQs
Does the generator price include installation?
No -- the $999-$6,499 range covers the generator unit only. Whole-house standby installation with a transfer switch and electrical work is handled by a licensed professional and typically adds several thousand dollars on top.
What size generator do I need to power my whole house?
It depends on the home's total electrical load, but the highest-output standby-capable units in the $4,500-$6,499 range are built for near-whole-house coverage -- a licensed electrician can confirm the exact wattage needed.
Is a portable generator cheaper than a standby generator?
Yes -- portable generators start around $999 and cover essential circuits, while standby-capable units near $4,500-$6,499 plus installation costs are what's needed for whole-house coverage.
Prices shown are item prices from Steelhaul Co.; freight delivery is quoted to your ZIP at checkout.