Generator Buying Guide

How Much Does a Generator Cost?

By Wildwood Repair Team Reviewed by a certified technician Updated August 12, 2026 7 min read
Quick Answer
How much a generator costs depends on the type. Portable generators run about $500 to $2,500, while whole house standby generators cost roughly $3,000 to $6,000 for the unit and $7,000 to $15,000 or more fully installed. Size, brand, and installation drive the price more than anything else.

The first question most buyers ask is how much does a generator cost, and the honest answer is that it ranges widely, from a few hundred dollars to well over ten thousand, because a generator can be anything from a small portable to a permanently installed whole house system. What you pay depends mostly on the type, the size in watts, the brand, and whether it needs professional installation. This guide breaks the cost down by type so you can budget for the one that fits your needs.

Cost by Generator Type

TypeTypical cost
Small portableAbout $500 to $1,000
Large portable or inverterAbout $1,000 to $2,500
Home standby unit onlyAbout $3,000 to $6,000
Whole house standby, installedAbout $7,000 to $15,000 or more

These are general ranges. Your actual price moves with the size, the brand, and, for standby units, the installation.

Portable Generators Cost the Least

A portable generator is the most affordable option, usually $500 to $2,500. You set it up during an outage, fuel it with gasoline, and power essentials directly or through a transfer switch. Inverter portables, which run quieter and cleaner, sit at the higher end. The cost stays low because there is no permanent installation.

Standby Generators Cost the Most

A home standby generator costs far more because it is a permanent system, not just a unit. The generator itself is roughly $3,000 to $6,000, but the installed total commonly reaches $7,000 to $15,000 once you add the transfer switch, a concrete pad, the electrical and fuel hookups, and permits. Large or complex jobs can exceed $25,000.

What Drives the Price

  • Size in watts or kilowatts: the single biggest factor, more power costs more.
  • Portable or standby: installation is most of a standby's cost.
  • Brand: premium brands like Honda or Generac cost more than budget units.
  • Fuel and features: dual fuel, inverter, and automatic start add cost.

Do Not Forget Running and Upkeep Costs

The purchase is not the only cost: budget for fuel, and for service. A generator needs regular oil changes and a yearly check to stay reliable, and that upkeep is far cheaper than a no-start during an outage. We service generators of every type on site.

Generator Service From Wildwood

Whatever generator you buy, Wildwood keeps it running. A technician comes to your driveway, services or repairs it on site, and quotes a flat rate before any work. More than 10,000 repairs since 2019, generator service from $75. Call 888-594-5516.

Frequently Asked Questions

How much does a generator cost?
It depends on the type. Portable generators run about $500 to $2,500, home standby units are roughly $3,000 to $6,000 for the generator alone, and whole house standby systems cost about $7,000 to $15,000 or more fully installed. Size and brand drive the price.
How much is a portable generator?
Usually $500 to $2,500. Small units for a few essentials sit near the bottom, while large or inverter portables that run quieter and cleaner sit at the top. You may also want a transfer switch or interlock, which adds a few hundred to a couple of thousand dollars.
Why are whole house generators so expensive?
Because a standby generator is a permanent system, not just a box. The unit is $3,000 to $6,000, but installation, the transfer switch, a concrete pad, electrical and fuel hookups, and permits push the installed total to $7,000 to $15,000 or more. Installation is most of the cost.
What is the cheapest type of generator?
A portable generator, usually starting around $500 for a small unit. It needs no permanent installation, so you avoid the electrical and fuel work that makes standby systems expensive. The trade-off is that you set it up and refuel it yourself during an outage.
Does generator size affect the price a lot?
Yes, size is the single biggest driver of price. More watts or kilowatts means a bigger, costlier engine and alternator. Buying only as much generator as you actually need, rather than the largest available, keeps both the purchase and running costs down.
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About the Author

Wildwood Repair Team

The Wildwood Small Engine Repair team has completed more than 10,000 mobile repairs on lawn mowers, snow blowers, generators and outdoor power equipment since 2019. Every guide is written from real bench experience and reviewed by a certified small engine technician before publishing.