Cost · Generators
The unit on the website is not the price of whole-house backup.
The first number a shopper sees is equipment-only. The quote lives in the install, the gas, and the transfer switch. This page holds the whole invoice up to the light.
Summary
Whole-house generator cost is three invoices: equipment, install, and ownership. A straightforward air-cooled automatic job often lands at $7,000–$15,000 all-in, and complicated gas or a liquid-cooled class climbs from there. These bands are planning fences, not bids — read on before a dealer quote reaches you first.
In this ledger
Here is the number problem. Websites price the engine. Dealers price the project. The gap between those two is where quotes go wrong. The Home Backup publishes order-of-magnitude US numbers so you can tell a serious bid from a teaser. We are not a dealer and we will not invent a standby SKU with a fake buy button. Markets move — union labor, rocky trench, an old panel, a propane tank in the far corner of the lot. Treat every dollar band below as a planning fence. Then get two written bids. Class context: air-cooled versus liquid-cooled. Sequence: buying guide.
Equipment vs install vs ownership
Three invoices hide inside “what does a whole-house generator cost.” Equipment is the engine, the enclosure, and often a matching ATS kit. Install is concrete, electrical, gas, and the inspection dance. Ownership is oil, filters, a starting battery, exercise, and a service contract that does not expire the week after a storm. Google the unit price alone and you are shopping a catalog, not a plant.
| Line item | Ballpark | Why it moves |
|---|---|---|
| Air-cooled unit (about 10–12 kW) | $3,000–$6,000 | Brand, enclosure, Wi-Fi module, whether ATS is bundled |
| Liquid-cooled unit (about 20–24 kW) | $5,000–$10,000+ | kW, sound package, longer duty hardware |
| Install + ATS + concrete | $3,000–$10,000+ | Trenching, panel age, load-shed kit, labor market |
| Gas line / tank work | $500–$4,000+ | Meter capacity, trench length, propane tank and regulators |
| Permits / inspection | $150–$800+ | AHJ, re-inspection, HOA drawings |
| Annual service | $150–$400 | DIY oil vs dealer; extra if you skipped exercise all year |
Add it up for a straightforward air-cooled automatic install. You land at $7,000–$15,000 all-in, most of the time. That is the number. Hold it in your head. Complicated gas, a long trench, a service upgrade, or a liquid-cooled “run everything” job climbs from there. A big house with the wrong pipe can pass $20,000. If $7k–$15k ends the conversation, you are not a standby customer yet. That is not a moral failure. It is a product fork.
Ownership is the line people forget. Weekly or monthly exercise burns a little fuel and a little neighbor patience. Oil and filters are cheap next to a seized engine. A starting battery that dies in year four is a Saturday without backup. Dealer contracts in the $150–$400 band are how a lot of owners actually keep the plant alive. DIY is fine if you will do it. An unmaintained $10,000 install is not “paid off.” It is deferred failure.
Who this cost is for
When the cost is justified
- A finished basement that floods without a sump. A well that is the only water.
- Medical devices, mobility needs, or heat in a climate where a two-day outage is a health problem.
- Outages measured in days, not hours. Especially in heating season.
- You will be away and the house still has to keep itself. Automatic is the product.
- You priced hotels, spoiled food, and a flooded carpet. The plant still wins over a decade.
Who should not write this check yet
- Renters. Owners who cannot get a permit or an HOA blessing.
- Households whose real budget after tax is a station, not a pad.
- People who will not exercise the unit. People who wanted rooftop solar instead.
- Anyone who has not listed loads. Kilowatts without a list are shopping, not specifying.
This check is for the house that has to behave like a house when the utility does not. It is not for the owner who had one four-hour flicker and wants a status object in the side yard. A non-negotiable 240 V well changes the math again. Price the split-phase battery path next to the pad — different physics, different invoice. Start at battery vs standby and the named Anker SOLIX F3800 kit. Neither is a pad generator. One of them may be the cheaper honest job.
When it is a vanity plant
Vanity is liquid-cooled money so the dryer and both condensers stay on during an outage you get once every three years. Vanity is a Wi-Fi module and a color-matched enclosure while the gas meter is still too small. Vanity is “whole house” as a social phrase when a load-shed 10–12 kW air-cooled plant would have covered heat, well, and food. The extra class is real when the heat pump’s locked-rotor amps demand it. Otherwise it is costume jewelry. You just did not want to turn anything off.
It is also vanity if you will not maintain it. An engine that never sees oil pressure is a sculpture. Neighbors hear the exercise if you run it. They will not hear the week it fails to crank. Check your honest outage history. A four-hour event every few years, a fridge that can ride a power station — then a $10,000 pad is a hobby. Hobbies are allowed. Do not call them insurance.
Rooftop solar plus a wall pack is a third budget. We will not sneak it into this silo. Tesla Powerwall is out of scope. If an installer is already quoting a roof, you are on the wrong site by design — see about.
What to ask a dealer
- Show me the load calc. Running and starting. Which loads are locked out. No load calc means they are selling a box.
- What is the altitude and temperature derate at my address for this class?
- Is the ATS service-entrance, load-shed, or a managed panel — and who lists it?
- Will the existing gas meter and pipe feed the BTU draw, or is a service upgrade in the bid?
- Who pulls the permit, who calls inspection, who comes back if it fails?
- What is included: pad, trench, start-up, Wi-Fi, first oil, warranty labor radius?
- What does year-two ownership cost if I take the service contract versus DIY?
- Where does exhaust point, and what clearances did you measure? Make them walk the lot, not the showroom.
Get the answers in writing. A low equipment number with a vague “install TBC” is how $4,000 becomes $14,000. Compare two bids on the same load list. Not on whose brochure is glossier. The Home Backup is not your AHJ and will not pick a contractor. If a quote fights the sequence in the buying guide, believe the load list. Automatic versus you-in-the-driveway still moves the invoice — standby vs portable.
Cheaper paths that are still backup
Say the $7k–$15k fence ends it. You still have backup products. They are just not pad plants. A portable power station covers a fridge, network, lights, and many medical devices for hours, with no exhaust. Expandable home batteries add watt-hours and, on some kits, 240 V. Neither replaces a well-plus-heat-pump plant for a week of ice. Both beat a generator you cannot afford to install correctly.
The carts we will actually link: Jackery, BLUETTI, and Anker SOLIX. Same price to you. We do not mint a generator hop. For hours of house essentials, read power stations for home backup. For kits you can grow, read expandable home batteries and the F3800 page linked above. Why those brands: how we review. Money: disclosure.
These bands are planning numbers for 2026 conversations. Your city is not promised the middle of any of them. Confirm live quotes. Confirm fuel tariffs. Confirm whether your HOA will even allow the pad. Questions about a sentence: contact. We will not remote-price a trench.
Write your loads down. Put the 240 V ones on their own line. Then ask for the load calc before anyone says a price.