Standby Generator Installation Cost Breakdown for 2026
The total cost of installing a standby generator system in 2026 ranges from $7,000 to $20,000, combining equipment and professional installation labor. The wide range reflects differences in generator size, brand selection, transfer switch type, fuel line complexity, and regional labor rates. Here is a detailed breakdown of every cost component so you can budget accurately for your project.
Equipment Costs
Generator Unit
The generator unit is the largest single equipment cost. Pricing varies by output capacity (kilowatts) and brand. A 10kW to 14kW air-cooled generator costs approximately $3,500 to $5,500. A 16kW to 22kW air-cooled generator costs approximately $4,500 to $7,500. A 24kW to 26kW generator costs approximately $6,500 to $9,500. A 28kW generator costs approximately $8,000 to $11,000. Generac is generally the most affordable at each size point. Kohler commands a premium of $500 to $2,000 above comparable Generac models for the additional build quality and quieter operation.
Automatic Transfer Switch
The transfer switch is a required component purchased alongside the generator. A 200-amp whole-house ATS costs approximately $800 to $1,500 when purchased as part of a kit with the generator. A load-managed transfer switch for smaller installations costs approximately $500 to $1,000. Buying a matched generator and ATS kit from the same manufacturer is the standard approach and typically costs less than purchasing the components separately.
How to Save on Equipment
Purchasing your generator equipment online from an authorized dealer like IB Lighting and hiring a local electrician for installation typically saves $500 to $2,000 compared to buying through the installer, who marks up equipment as part of their profit model. You get the same full manufacturer warranty, the same product, and the same performance at a lower equipment cost.
Installation Labor Costs
Professional installation by a licensed electrician typically costs $3,000 to $6,000 for a standard residential installation. This includes the concrete or composite mounting pad (if poured on site), generator positioning on the pad, electrical wiring from the generator to the transfer switch and panel, transfer switch installation and wiring, gas line connection from the meter or propane tank to the generator (often subcontracted to a licensed plumber at $500 to $1,500), system programming, testing, and commissioning, and homeowner orientation on system operation.
Factors That Increase Installation Cost
Long distances between the generator location and the electrical panel require more wire and conduit. Complex gas line routing (long runs, through-wall penetrations, or new propane tank installation) adds plumbing cost. Homes with multiple panels or panel upgrades needed to accommodate the transfer switch increase electrical work. Difficult terrain, limited access, or extensive site preparation adds labor hours. High-cost metropolitan areas have higher labor rates overall.
Permit and Inspection Costs
Most municipalities require electrical and building permits for generator installation. Permit fees typically range from $100 to $500 depending on your jurisdiction. Your installer usually handles the permit application and scheduling the final inspection. Some areas also require a separate gas permit for the fuel line connection.
Total Cost by Configuration
For a basic essential-circuits system (14kW Generac plus load-managed ATS plus standard installation), the total project cost is approximately $7,000 to $10,000. For the most popular whole-house system (22kW Generac plus 200-amp whole-house ATS plus standard installation), the total is approximately $9,000 to $14,000. For a premium whole-house system (22kW to 26kW Kohler plus 200-amp ATS plus installation), the total is approximately $12,000 to $18,000. For a large-home system (26kW to 28kW Generac plus installation), the total is approximately $14,000 to $20,000.
Offsetting the Cost
A standby generator adds an estimated 3% to 5% to your home value, which on a $400,000 home translates to $12,000 to $20,000 in added equity. Some insurance companies offer premium discounts of 3% to 5% for homes with generators. The generator may qualify for tax deductions if installed for medical necessity, on a rental property, or for a home office. A single prevented outage event (frozen pipe repair at $5,000 to $20,000, or basement flood cleanup at $3,000 to $15,000) can offset a significant portion of the generator investment.
Get competitive equipment pricing from IB Lighting. Browse our Generac home standby generators 10kW to 28kW collection and Kohler generators, or call (800) 674-9019 for a quote. Add to cart to see final pricing. Free freight plus insurance included on every order.