Whole House Generator Cost in Eau Claire: Installed Prices, Sizes and Permits

Whole House Generator Cost: The Short Answer

Whole house generator cost runs $6,000 to $11,000 installed on average, according to HomeGuide’s national figures, and $9,500 to $24,000 when the unit sits far from the panel or is larger than 20 kW. Angi’s 2026 national data puts whole-house 22 to 48 kW units at $5,000 to $18,000. There is no published Eau Claire price, so use these national numbers to read quotes from electricians in Eau Claire, and expect the final figure to depend on your house, your fuel and how far the wiring and gas line have to run.

How much does a whole house generator cost installed?

HomeGuide’s national figure is $6,000 to $11,000 installed: $3,000 to $6,000 for the unit and $3,000 to $5,000 for labor. Labor climbs to $5,000 to $12,000 or more for longer distances or units over 20 kW, which is where the $9,500 to $24,000 total comes from.

Why do Angi’s numbers vary so much?

Angi’s national numbers depend on which figure you read: its average for a whole-house generator installation is $5,154, with a full range of $350 to $13,500, while its 2026 by-type table puts true whole-house 22 to 48 kW units at $5,000 to $18,000. The average is based on 4,364 verified projects, with most people paying $1,509 to $8,799. The same table lists portable 1 to 7.5 kW units at $500 to $2,000 and partial 9 to 20 kW units at $2,000 to $6,300, and Angi says a standby generator typically costs $5,000 to $25,000. Compare a quote against the row that matches the size you are buying.

Whole House Generator Cost by Size

What size generator do I need for my house?

Start by listing what you want running during an outage, then add up the wattage. That is Angi’s approach: a 10 kW generator provides 10,000 watts. HomeGuide says a whole house up to 3,000 sq ft typically needs 13 to 20 kW, and gives these running wattages: sump pump 1,000 W, well pump 1,000 W, furnace fan 500 W, refrigerator or freezer 1,200 W. Startup wattage can be double the running wattage.

In a Wisconsin winter outage, the loads that matter most are often the ones that protect the house. If your home relies on a sump pump, a well pump or a gas furnace with an electric blower fan, make sure those are on the list before anything else. For questions about how your furnace or heating system will behave on generator power, HVAC contractors in Eau Claire can help.

Angi’s 2026 national prices by size, with what each size can power:

Generator size	Angi 2026 national cost	What it can power (Angi)
1 to 6 kW	$500 to $1,800	Refrigerator, freezer, sump pump, lighting, a few small appliances
7.5 to 10 kW	$2,000 to $3,500	Adds well pump, furnace fan, more lighting and outlets
14 to 18 kW	$4,000 to $5,500	Adds air conditioning and a water heater
20 to 24 kW	$5,000 to $6,500	All essential and non-essential loads, multiple ACs, electric ranges
26 to 32 kW	$6,500 to $15,000	All home systems, including larger HVAC and multiple water heaters
36 to 38 kW	$14,000 to $16,000	All home systems, including commercial-grade equipment
45 to 48 kW	$16,200 to $21,000	All home systems, plus multiple ACs and electric ranges

Whole House Generator Cost: What a Quote Includes

A quote bundles the unit with several separate jobs. Ask for a full cost breakdown, which HomeGuide recommends, so you can see each one.

How much does a transfer switch cost?

HomeGuide puts transfer switch installation at $400 to $2,500 total nationally, and an automatic transfer switch at $600 to $2,500. Angi says about $1,200 of a standby installation goes to the transfer switch wiring. The switch is what keeps the generator from back-feeding the grid, which Angi warns can seriously injure or kill utility workers.

Is the concrete pad extra?

Often, yes, and it is worth asking. HomeGuide lists a pre-cast pad at $150 to $400 nationally. Angi puts poured pad site prep at $50 to $75 per sq ft, or about $1,000 for a standard 3 ft by 6 ft pad.

What other line items show up?

National line items from the two cost guides:

• Electrical wiring: $6 to $8 per foot (HomeGuide). Electricians charge $50 to $130 per hour for generator hookup (HomeGuide).
• Gas line: $15 to $50+ per linear foot (HomeGuide). Complex jobs may need long trenches for conduit and gas pipe.
• Propane tank: $400 to $1,800 if you need one (HomeGuide).
• Permits: $80 to $450 total, and separate electrical, plumbing and mechanical permits may be required (HomeGuide). Angi lists permits at $50 to $200.
• Electrical subpanel upgrade: $500 to $2,000 (Angi).
• New circuit: $570 to $1,000 (Angi).
• Labor: $1,500 to $5,000 (Angi); Angi says standby installation averages $4,520 for permits, assembly, placement and wiring.

Whole House Generator Cost by Fuel

Natural gas or propane?

Natural gas is cheaper to run if you already have a gas line; propane works where you do not. HomeGuide’s national unit prices are $3,000 to $6,000 for natural gas (uses your existing gas line, no fuel storage) and $2,000 to $6,000 for liquid propane (needs a large storage tank). Diesel runs $5,000 to $18,000 and needs manual refueling.

Running costs differ more than unit prices. HomeGuide puts a 20 kW unit at $30 to $40 per day on natural gas and $150 to $170 per day on propane, depending on local fuel prices. Angi estimates propane fuel at about $220 daily for a 20 kW unit. For the fuel decision beyond generators, see our guide to propane vs natural gas in Eau Claire. The gas line is plumbing work, and for gas and propane units HomeGuide recommends a pro certified for gas plumbing, so a quote may involve plumbers in Eau Claire as well as an electrician.

Will a standby generator start in an Eau Claire cold snap?

A cold-weather kit helps it start: HomeGuide lists one at $130 to $500 nationally and says it ensures the generator starts where temperatures drop below freezing. If an outage could put your plumbing at risk, our guides on how to keep pipes from freezing and sump pump installation cost cover the other half of that problem.

Whole House Generator Cost and Cheaper Options

Is a partial-home generator enough?

A partial-home unit costs less and covers the essentials. Angi puts partial 9 to 20 kW generators at $2,000 to $6,300 in 2026, and Angi’s first money-saving tip is choosing a partial-home generator. An electrician can connect only essential circuits, such as the refrigerator, kitchen, lights, heating, security, garage door and pumps.

Is a portable generator with an interlock cheaper?

Yes, by a wide margin. HomeGuide puts portable generators at $500 to $2,500 nationally, plus $400 to $1,300 for a transfer switch. A generator interlock costs $400 to $850 installed, according to HomeGuide, and lets a portable generator connect to the panel without a transfer switch.

The trade-off is safety and effort. DATCP says portable generators should never be connected directly to a building’s wiring; use a transfer switch installed by a licensed electrician. The CDC says to run a portable generator outdoors more than 20 feet from windows, doors and vents, never inside a home or garage even with doors and windows open, and to use a battery-powered or battery backup CO detector.

Whole House Generator Cost and Wisconsin Rules

Who can install a standby generator in Wisconsin?

DATCP says only a qualified professional, such as a licensed electric contractor, should install a permanent standby generator. The owner is responsible for making sure electricity cannot back-feed into power lines, and DATCP recommends a double-pole, double-throw transfer switch, which also protects the generator, wiring and appliances when service is restored. Back-fed voltage can be stepped up by the transformer and electrocute line workers. To check a contractor’s credentials, see our guide to the Wisconsin contractor license.

Do I need a permit in Eau Claire?

Yes, in most cases: the City of Eau Claire requires an electrical permit any time wiring involves a new or added electrical service, feeder or branch circuit. A licensed electrical contractor, or the homeowner residing in the home, must get the permit before any work begins. Inspections happen along the way: an underground rough-in before buried conductors are covered, then a final, and final approval closes the permit. Permits are valid 12 months, and inspection requests made by 3:00 pm are scheduled for the next day at (715) 839-4947. Outside city limits, check with your town, village or city.

Should I tell my electric company?

Yes: DATCP says to call your electric company when you install a permanent generator so they note it in their records for workers on outages. If you are unsure an existing standby generator was installed properly, DATCP says to call the local building inspector or a licensed contractor.

Where can the generator go?

HomeGuide says a standby unit belongs outside, at least five feet from doors, windows, vents and flammable material.

Whole House Generator Cost Over Time

How long do whole house generators last?

HomeGuide says 15 to 30 years, or 10,000 to 30,000 hours, with maintenance, and most come with 5 to 10 year limited warranties.

Maintenance is the recurring cost. HomeGuide puts it at $200 to $650 per year nationally for a full inspection plus oil and filter changes; Angi’s 2026 range is $80 to $300. DATCP advises starting and loading a generator at least once a month.

How can I pay less?

• Choose a partial-home generator, or cut the loads you need covered so a smaller unit will do (Angi).
• Ask an electrician about smart load management, which connects specific circuits; Angi lists it at $150 to $300 and HomeGuide lists a smart load manager at $130 to $250.
• Get at least three in-person estimates, a written contract and warranty, and avoid large upfront payments (HomeGuide).
• Ask whether the installer handles the gas plumbing or subcontracts it, what permits you need and whether they obtain them, and what the payment schedule is (HomeGuide).