How Much Does a Generac Generator Cost?

Updated on August 30, 2026 | Written by Alec Pow
This article was researched using 7 sources. See our methodology and corrections policy.

A Generac generator can cost around $500 to $2,000 for many portable models, while a permanently installed Generac standby system commonly reaches about $10,000 to $13,000 for a typical natural-gas installation. Larger generators, difficult fuel runs, service-panel work, trenching, permits, and other site complications can push an installed standby project toward $16,000 to $25,000+.

The generator itself is only part of the standby price. Generac’s current Next Generation 22 kW system starts at $7,369 when bundled with a transfer switch. Electrical work, gas or propane plumbing, pad preparation, permits, inspection, startup, and load-management equipment can add thousands more.

Portable generators have a much lower entry price. Generac currently lists its 6,500-watt GP6500 at about $979, but safely connecting a portable generator to household circuits may require a professionally installed manual transfer switch or other approved connection equipment.

Article Highlights

• Generac portable generators commonly fall in the broad $500 to $2,000 (at $30 per hour, earning that amount would take about 0.4 to 1.7 full-time workweeks, before taxes) price category, depending on output and features.
• Generac currently lists a 6,500-watt GP6500 portable at about $979.
• The current Next Generation 22 kW standby generator bundled with a transfer switch starts at $7,369.
• Natural-gas standby installations commonly total around $10,000 to $13,000 in current 2026 cost data.
• The current Next Generation 22 kW uses about 221 to 311 cubic feet of natural gas per hour at published 50% to 100% loads.
• At those published rates, 24 hours of continuous operation works out to about 5,304 to 7,464 cubic feet of natural gas.
• Current standby-generator maintenance averages roughly $150 to $300 per year, while professional service visits can cost around $171 to $395.

How Much Does a Generac Generator Cost?

Generac example	Current price	What the price represents
GP6500 portable	About $979 (about 4.1 full-time workdays at $30 per hour)	Current Generac MSRP for 6,500 running watts
PowerPact 7.5 kW package	About $2,240	Retail equipment example with transfer equipment
Older Guardian 22 kW package	About $6,839	Older-generation retail package example with 200A transfer switch
Next Generation 22 kW bundle	$7,369	Current Generac starting MSRP with transfer switch
Typical natural-gas standby installation	$10,000-$13,000	Current 2026 installed planning range
Larger or complicated standby project	$16,000-$25,000+	Large generator or substantial installation scope

The current Next Generation 22 kW bundle has a starting MSRP of $7,369. It includes a transfer switch and adds Generac’s newer Power Zone controller, cellular connectivity, remote diagnostics, electronic fuel and ignition control, and longer service-interval features.

An older 22 kW Guardian package remains a useful retail comparison. Ace has listed that previous-generation package at about $6,839.

ThePricer math: the newer $7,369 bundle costs $530 more than the $6,839 older-package example.

$530 ÷ $6,839 = about 7.7%.

So the current Next Generation bundle carries roughly a 7.7% equipment premium in this comparison. Generac says its newer electronic fuel and ignition controls improve fuel efficiency on average versus Guardian-series generators, which means the higher purchase price is not purely a cosmetic model change.

Portable, Inverter, or Standby?

Generac sells backup power at very different price levels because a portable generator and an automatic home standby system solve different problems.

Portable generators are the lowest-cost route. A current Generac GP6500 starts around $979 (about 4.1 full-time workdays at $30 per hour) and supplies 6,500 running watts with 8,125 starting watts. It can run refrigerators, lights, internet equipment, sump pumps, and other selected loads when properly sized.

Inverter generators are also portable but generally trade some watt-per-dollar value for quieter operation, better efficiency at partial loads, and controlled electrical output. They make particular sense for RVs, electronics, working from home during outages, or neighborhoods where generator noise matters.

Standby generators live permanently outside, connect to natural gas or propane, and automatically start after a utility outage. They also require an automatic transfer switch and professional integration with the home’s electrical system.

This is why the comparison is not simply $1,000 versus $7,000. A portable generator can be purchased and stored until needed. A standby generator becomes a permanent home system with installation, inspection, fuel plumbing, startup, and ongoing maintenance.

Installation Is the Expensive Part

Installation is where two homeowners buying the same generator can receive very different totals.

Current Angi 2026 natural-gas generator pricing puts many installed projects at approximately $10,000 to $13,000. Larger systems and more complicated installations can move substantially higher.

A standby installation can include:

• Generator and automatic transfer switch
• Concrete or composite mounting pad
• Electrical wiring and conduit
• Transfer-switch integration
• Natural-gas or propane plumbing
• Gas meter or regulator changes where required
• Trenching for electrical or fuel runs
• Grounding and bonding
• Permits and inspection
• Load-management modules
• Generator startup and commissioning

Suppose a buyer starts with the current $7,369 Next Generation 22 kW bundle and receives a $12,000 complete installed quote.

The implied non-generator portion is:

$12,000 – $7,369 = $4,631.

That means about 38.6% of the modeled installed total is outside the headline generator-and-transfer-switch price.

A quote with a long gas run, service upgrade, trenching, or difficult placement can move that percentage much higher.

Compare each bid by the work included rather than the final number alone. Ask contractors to identify equipment, electrical work, fuel work, pad, permits, inspection, startup, load management, and any recurring service plan separately.

Our separate guide to whole-house generator installation costs goes deeper into the labor and site-work side of the project.

Sizing Changes the Bill

Generator sizing should begin with the loads you want to operate rather than the square footage of the house.

An essentials-only system may need to support refrigerators, lighting, a furnace blower, Wi-Fi, sump pump, and selected outlets. A whole-home plan may also need central air conditioning, well pumps, electric cooking, dryers, and other high-demand appliances.

Motors and compressors create another complication because their starting demand can be substantially higher than their normal running wattage.

Load management can sometimes reduce the generator size required. Generac’s Smart Management Modules can control high-demand loads so several large appliances do not all start simultaneously.

This creates an important cost question: paying for load management can be cheaper than buying a substantially larger generator just to cover a few brief overlapping peaks.

The current Generac air-cooled standby range extends through 28 kW, while larger liquid-cooled products serve homes and commercial properties requiring still more capacity.

Fuel Can Cost More Than Expected

Fuel becomes the major hidden expense during a long outage.

The current Generac Next Generation 22 kW specifications list natural-gas consumption of:

• 221 cubic feet per hour at 50% load
• 311 cubic feet per hour at 100% load

Propane consumption is listed at:

• 2.45 gallons per hour at 50% load
• 3.71 gallons per hour at 100% load

The 24-hour natural-gas math is:

221 × 24 = 5,304 cubic feet at the published 50% load rate.

311 × 24 = 7,464 cubic feet at the published 100% load rate.

For propane:

2.45 × 24 = 58.8 gallons at 50% load.

3.71 × 24 = 89.04 gallons at 100% load.

These numbers are theoretical 24-hour calculations using Generac’s published consumption rates. A real household load moves up and down throughout the day, so actual use will not normally sit at one fixed percentage continuously.

As another reality check, current standby-generator operating data puts fuel cost around $2 to $5 per hour, with an average near $3 per hour.

At that average, 24 continuous hours would be roughly:

$3 × 24 = $72 per day.

A five-day outage at the same modeled average becomes $360 in fuel-related operating expense.

Portable Safety Has a Cost Too

Portable generators avoid a five-figure permanent installation, but they require more hands-on operation and careful safety planning.

The Electrical Safety Foundation International’s portable generator guidance says generators should be operated outdoors at least 20 feet from the home and away from doors, windows, and vents because of carbon monoxide.

Never run a portable generator inside a garage, even with the garage door open. Carbon monoxide is colorless and odorless and can accumulate to lethal levels.

ESFI also recommends carbon-monoxide alarms, grounded cords rated for the load, GFCI protection, and an approved transfer switch when connecting generator power to household wiring.

Connecting a portable generator directly to a home’s wiring without a safe transfer method can backfeed utility lines and create an electrocution hazard for utility workers.

A proper portable setup can therefore include the generator plus:

• Heavy-duty outdoor-rated extension cords
• Fuel cans and safe fuel storage
• CO alarms
• Power inlet
• Manual transfer switch or approved interlock arrangement
• Electrician labor

A homeowner who only prices the $979 GP6500 is not necessarily pricing the complete backup-power setup.

If backup power is only needed temporarily for a particular event, compare those costs with generator rental pricing before purchasing equipment.

Maintenance Is Part of Ownership

Standby generators have to remain ready while sitting unused for much of the year, so maintenance is not optional.

Current Angi data puts typical ongoing standby-generator maintenance around $150 to $300 per year. A professional scheduled maintenance visit currently averages about $171 to $395, depending on generator size, fuel system, service scope, and location.

Generac’s current air-cooled maintenance schedule is more specific:

• Break-in maintenance after 25 runtime hours for Next Generation models
• PowerPact break-in oil change after 20 runtime hours
• Yearly maintenance at 100 hours or one year, whichever comes first
• Schedule A at 200 hours or two years
• Schedule B at 400 hours or four years

A long outage can bring those intervals forward quickly. Generac’s July 2026 continuous-use guidance says a standby unit running continuously should receive checks every 24 hours, including oil level and inspections for leaks and blocked enclosure openings.

Consider a generator that runs for five uninterrupted days:

5 days × 24 hours = 120 runtime hours.

That single outage can exceed the normal 100-hour annual service threshold even though only a few calendar days have passed.

Current Next Generation standby models also carry a 5-year limited warranty. Exact warranty and maintenance requirements should be checked for the model purchased rather than assuming every Generac product uses the same terms.

Three Realistic Cost Builds

Case 1, portable essentials backup. Start with a current GP6500 at approximately $979. Add appropriate cords and fuel storage. A permanent inlet and transfer arrangement raises the cost further but gives a safer, cleaner way to power selected household circuits. This approach can remain far below a permanent standby system when automatic operation is not required.

Case 2, small essentials-focused standby. A smaller PowerPact-style system can start with hardware around the low $2,000s. Electrical work, fuel plumbing, pad, permits, and startup can still cause installation expenses to equal or exceed the equipment price.

Case 3, current 22 kW whole-home setup. Start with the $7,369 Next Generation generator-and-transfer-switch bundle. At a modeled $12,000 installed total, installation and associated work account for approximately $4,631. Difficult sites can move the finished price toward the current $16,000 to $25,000+ upper benchmark.

A GenerLink can provide another connection strategy for some portable-generator installations where the utility permits it. Our GenerLink cost guide explains how that approach differs from a conventional manual transfer switch.

Which Setup Makes Sense?

Makes sense if:

• You want automatic backup and can justify a $10,000 to $13,000+ standby investment.
• Your household has medical, well-pump, sump-pump, refrigeration, HVAC, or work-from-home loads that make outage protection particularly valuable.
• You have natural gas or sufficient propane storage and suitable outdoor placement.
• You have compared generator size using actual loads rather than buying the largest model by default.
• You are prepared for recurring fuel and maintenance costs after installation.

Does not make sense if:

• You only need occasional power for a refrigerator, lights, internet, and a few outlets and could safely use a portable generator instead.
• You are budgeting from the generator box price and ignoring another several thousand dollars of installation.
• You plan to place a portable generator in a garage, porch, or other enclosed or semi-enclosed location.
• You are oversizing a standby generator instead of considering load management.
• Your quote does not identify transfer equipment, fuel plumbing, permits, electrical work, and startup separately.

What We Checked

• Checked Generac’s current 2026 Next Generation standby lineup and confirmed that air-cooled residential models now extend through 28 kW.
• Confirmed the current $7,369 starting MSRP for the 22 kW Next Generation bundle with transfer switch.
• Verified current 22 kW fuel consumption of 221 to 311 ft³/hour for natural gas and 2.45 to 3.71 gallons/hour for propane.
• Cross-referenced July 2026 installed and operating-cost estimates before retaining the $10,000 to $13,000 natural-gas installation range.
• Verified current Generac break-in, 100-hour, 200-hour, and 400-hour maintenance intervals.
• Confirmed the portable-generator 20-foot placement rule and transfer-switch guidance against current electrical safety recommendations.

Answers to Common Questions

How much does it cost to install a Generac whole-house generator?
A typical natural-gas standby installation currently costs around $10,000 to $13,000. Larger generators or homes needing long fuel runs, trenching, electrical upgrades, complicated placement, or other work can reach $16,000 to $25,000+.

How much does a 22 kW Generac generator cost?
Generac’s current Next Generation 22 kW model bundled with a transfer switch starts at $7,369. That is equipment pricing rather than a complete professionally installed project.

How much does a portable Generac cost?
Portable-generator pricing varies widely by output. A current Generac GP6500 starts around $979, while the broader portable category commonly runs from several hundred dollars to around $2,000 for larger or more feature-rich units.

How much fuel does a 22 kW Generac use?
The current Next Generation 22 kW uses about 221 cubic feet of natural gas per hour at 50% load and 311 cubic feet per hour at 100% load. Published propane consumption is approximately 2.45 to 3.71 gallons per hour.

How much does a Generac cost to run for 24 hours?
Current standby-generator operating estimates average about $3 per hour, which calculates to roughly $72 for 24 hours. Actual cost depends on fuel price, generator size, and electrical load.

How much maintenance does a Generac need?
Current annual standby maintenance commonly costs around $150 to $300. Generac also specifies service according to runtime, including break-in work after about 25 hours on Next Generation units and recurring service at 100-, 200-, and 400-hour intervals.

How far should a portable generator be from the house?
Electrical-safety guidance says to operate a portable generator outdoors at least 20 feet away from the home and away from doors, windows, and vents. Never operate one inside a garage or other enclosed space.