A backup generator costs $1,512 to $16,000 installed in 2026
A backup generator costs $1,512 to $16,000 installed in 2026. HomeAdvisor says the average is $5,157 and most homeowners pay $1,512 to $8,803. Bluetti says Generac installs run $8,000 to $16,000. AJ Long Electric lists a portable generator hookup at $900 to $2,500. The size, the transfer switch, and the labor move the price. Costs also differ by home and region.
What price guides say
We checked 4 price guides and read every number on their pages on October 7, 2026. They do not all measure the same thing, so read each line for what it counts.
| Source | What it found |
|---|---|
| HomeAdvisor | HomeAdvisor says installing a backup generator costs $5,157 on average and $1,512 to $8,803 for most homeowners, with sizes of 1 to 6 kW at $500 to $1,800, 7.5 to 10 kW at $2,000 to $3,500, 14 to 18 kW at $4,000 to $5,500, 20 to 24 kW at $5,000 to $6,500, 26 to 32 kW at $6,500 to $15,000, 36 to 38 kW at $14,000 to $16,000, and 45 to 48 kW at $16,200 to $21,000; labor is $1,500 to $5,000, a manual transfer switch is $500 to $2,000, an automatic transfer switch is $2,000 to $30,000, permits are $50 to $200 each, and a concrete pad is about $1,000; yearly care is $80 to $300. |
| AJ Long Electric | AJ Long Electric lists a portable generator hookup with an inlet and transfer switch at $900 to $2,500, a portable battery setup at $2,500 to $6,000, and whole-home battery power at $6,000 to $15,000 or more in Northern Virginia. |
| Bluetti | Bluetti says installing a Generac generator costs $8,000 to $16,000 on average, with a 10 kW unit at $3,769 and a 24 kW unit at $6,729, and bundles with a transfer switch at $4,619 and $7,789; a sample quote lists a transfer switch at $1,200, electrical labor at $2,500, plumbing and gas at $1,500, site prep and pad at $500, and permits and testing at $400. |
| ContractorPlus | ContractorPlus estimates a whole house generator install in Nashville at $11,085 on average, with a range of $7,760 to $15,519, including a generator unit at $6,038, an automatic transfer switch at $850, a pad at $389, wiring at $600, and gas line materials at $500, with a 30 percent contractor markup. |
Backup generator cost by size and setup
| Size or setup | Installed cost | Source |
|---|---|---|
| 1 to 6 kW | $500 to $1,800 | HomeAdvisor |
| 7.5 to 10 kW | $2,000 to $3,500 | HomeAdvisor |
| 14 to 18 kW | $4,000 to $5,500 | HomeAdvisor |
| 20 to 24 kW | $5,000 to $6,500 | HomeAdvisor |
| 26 to 32 kW | $6,500 to $15,000 | HomeAdvisor |
| Portable hookup with switch or inlet | $900 to $2,500 | AJ Long Electric |
| Whole-home battery power | $6,000 to $15,000 or more | AJ Long Electric |
| Most homeowners, installed | $1,512 to $8,803 | HomeAdvisor |
Every number in this table was read on one of the source pages listed at the bottom of this page.
What pushes the price up
| What | Why it matters |
|---|---|
| Size in kW | A bigger unit powers more of your home. HomeAdvisor lists 7.5 to 10 kW at $2,000 to $3,500 and 26 to 32 kW at $6,500 to $15,000. |
| Standby or portable | A portable setup costs less than a fixed unit. AJ Long Electric lists a portable hookup with a switch or inlet at $900 to $2,500. |
| Transfer switch | This switch links the generator to your home. HomeAdvisor lists a manual switch at $500 to $2,000, and ContractorPlus lists an automatic one at $850. |
| Labor | Installers run wiring, and a standby unit needs a gas line. HomeAdvisor lists labor at $1,500 to $5,000, which can match the cost of the unit. |
| Pad and permits | A fixed unit needs a pad and permits. HomeAdvisor lists a pad at about $1,000 and permits at $50 to $200 each. |
What the price includes
An installed price usually covers the generator, the switch, wiring, and a test run. Fixed units also need a pad and a gas line. Permits may be in the price or billed on top. Fuel, a service plan, and a panel upgrade are often extra. HomeAdvisor lists yearly care at $80 to $300. It does not include tax or extras the provider adds on the day.
Who charges this and how it is billed
Licensed electricians and generator dealers install these units. A quote often lists the equipment, the transfer switch, labor, and permits. A deposit is common, and the balance is due when the job is done. Gas work may come from a gas fitter, so ask who handles it. HomeAdvisor lists labor at $1,500 to $5,000, permits at $50 to $200 each, and a manual switch at $500 to $2,000. ContractorPlus shows a Nashville estimate with a 30 percent contractor markup. Ask for the full price in writing before work starts.
When you need this
A backup generator helps when storms, heat, or cold cause long outages. It keeps food cold, the heat on, and medical gear running. It also helps if you work from home or run a well pump or sump pump. For short outages, a portable hookup may be enough. For long ones, a fixed unit is easier.
How to judge your quote
- Does the quote list the size in kW and the fuel type?
- Is the transfer switch in the price, and is it manual or automatic?
- Are wiring, a gas line, a pad, and permits listed in writing?
- Does the price include a test run and a warranty?
- Compare the total with the range above: $1,512 to $16,000 per generator installed for most people in 2026.
Ways to pay less
- Pick the size you need. Add up the items you must run, then ask the installer to size the unit to that load.
- Think about a portable hookup if outages are short. AJ Long Electric lists a hookup at $900 to $2,500, far less than a fixed unit.
- Get three written quotes with the same size and switch. This makes it easy to see which bid is really lowest.
- Ask what is in the permit price. HomeAdvisor lists permits at $50 to $200 each, so a quote that leaves them out may cost more later.
- Ask about a package with the switch. Bluetti lists a 10 kW unit at $3,769 and a bundle with a switch at $4,619.
How we got these numbers
The range on this page comes from HomeAdvisor, AJ Long Electric, Bluetti and ContractorPlus. We opened each source page and read every number on it on October 7, 2026. Where the sources disagree, the table above shows each one so you can see the spread. These are planning ranges, not quotes. The written price you are given is the real price.
Common questions
How much does a backup generator cost in 2026?
HomeAdvisor says $5,157 on average and $1,512 to $8,803 for most homeowners. Bluetti says Generac installs run $8,000 to $16,000.
How much does a small generator cost to install?
HomeAdvisor lists 1 to 6 kW units at $500 to $1,800 and 7.5 to 10 kW units at $2,000 to $3,500. A portable hookup is $900 to $2,500 from AJ Long Electric.
How much is a large generator?
HomeAdvisor lists 26 to 32 kW at $6,500 to $15,000 and 45 to 48 kW at $16,200 to $21,000. These are installed prices.
What does ongoing care cost?
HomeAdvisor lists yearly maintenance at $80 to $300. Ask the installer what a service plan includes.
Is a battery cheaper than a generator?
Not always. AJ Long Electric lists whole-home battery power at $6,000 to $15,000 or more, close to many fixed generators.