Generac Generator Cost: $5,000–$25,000 (Average $9,500) in 2026

How much does a Generac generator cost?

A fully installed Generac generator typically runs $5,000 to $25,000, averaging around $9,500. That’s not a single source’s headline number — it’s synthesized from how Generac prices compare to the market. HomeAdvisor and Bob Vila both put Generac’s starting unit-only cost at $6,000, the highest starting price of the five brands each of them compares by name (Champion $2,000, Honda $1,310, Briggs & Stratton $3,150, Cummins $3,700, Generac $6,000). HomeGuide’s Generac-specific pricing breaks that down further: a 7 kW unit runs about $2,000, a 22 kW unit (the most common whole-home size) about $5,000, and 30 kW-and-up systems around $12,000 — all before installation labor, which HomeGuide puts at $3,000 to $5,000 on top. Fixr’s brand range stretches from $2,000 to $30,000 to account for the largest custom systems. None of that is a bargain-basement number: Forbes Home is explicit that “Champion and Honda tend to offer some of the most affordable generators, while Generac generators are on the more expensive side. For middle-of-the-road options, consider looking at generators from Briggs & Stratton or Cummins.”

Is Generac worth the premium?

Weighed against the broader whole-house generator category — which averages about $9,000 installed with a $4,000-$25,000 range — Generac’s pricing sits at or modestly above that average rather than below it. That’s the honest way to read the numbers: you are not finding a below-market deal by choosing Generac over a lesser-known brand at the same kW size. What the higher starting price buys is scale — Generac is, per HomeGuide, “the leading brand in whole-home generators,” which in practice means a larger network of authorized dealers and technicians who stock Generac parts, plus a widely recognizable resale name if you ever sell the house. Whether that’s worth several hundred to a couple thousand dollars more than a Briggs & Stratton or Cummins unit of the same size depends on how much you value dealer density and service-network familiarity over saving money on an equivalent-capacity machine. As Consumer Reports generator testing engineer Paolo Fu puts it, “Whole-house generators are for people who want peace of mind for their homes without the hassle of portable or inverter generators” — a description that applies to any standby brand at this size, not something unique to Generac.

What size Generac generator, and what does each size cost?

Size is the biggest driver of price within the Generac lineup itself. HomeGuide’s Generac-specific figures show unit-only costs climbing steadily with capacity: about $2,000 for a 7 kW unit (enough for a handful of circuits), $3,800-$4,000 for 16-17 kW (a small-to-mid-size home’s critical systems), roughly $5,000 for the 22 kW size most homeowners land on for whole-home backup, and around $12,000 once you’re in the 30 kW-and-up range built for larger homes. Add HomeGuide’s general installation-labor estimate of $3,000-$5,000 to each of those, and a small 7-10 kW system lands around $5,000-$8,000 installed, a mid-size 16-20 kW system around $6,800-$9,500, the popular 22 kW size around $8,000-$10,000, and a large 30+ kW system $15,000-$17,000 or more. Installation cost climbs further for long gas-line or electrical runs, or for any system over 20 kW, where HomeGuide’s total installed range for the category overall reaches $9,500-$24,000.

How to keep the cost down without giving up the Generac name

• Size the unit to your actual load, not the largest option a salesperson shows you. A 22 kW unit covers most homes’ main systems; oversizing into the 30+ kW tier roughly doubles or triples the unit cost for capacity most houses don’t need.
• Get multiple installer quotes, since labor — not just the Generac unit price — makes up $3,000 to $5,000 or more of the total, and that portion varies by contractor and region (HomeGuide).
• Compare a mid-tier brand at the same kW size before committing. Fixr and HomeGuide both show Briggs & Stratton and Cummins covering similar size ranges for less than Generac’s starting price, if dealer-network breadth isn’t your top priority.
• Ask what’s bundled and what’s a separate line item. The transfer switch, concrete pad, electrical panel work, and permits are quoted the same way regardless of brand, so a Generac quote that looks unusually low may be excluding one of them.

Prices vary by region, generator size, and installer, so treat the figures above as a planning budget rather than a quote. Get two or three local quotes, and confirm whether the transfer switch, concrete pad, and permits are included before comparing bids against the numbers here. For the broader category context, see our whole house generator cost guide; once installed, ongoing upkeep is covered separately in our generator maintenance cost guide.