How Much Does a Generator Cost?
Generators range from about $500 for a small portable to $15,000 or more for a whole house standby installed. Portables run $500 to $2,500, inverters $500 to $4,000, and standby units cost $3,000 to $6,000 for the hardware before the professional install that a whole house system needs. Type and power output set the price.
The question of how much does a generator cost has no single answer, because a generator can be a hundred pound portable you wheel out for a storm or a permanently installed system that powers your whole house automatically. Those sit at completely different price points. Portables start a few hundred dollars, while a whole house standby installed can reach five figures. What separates them is power output and whether the unit installs itself into your home. Here is the full range by type and what actually drives the number.
The Full Price Range by Type
| Generator type | Price range |
|---|---|
| Small portable | $500 to $1,200 |
| Large portable | $1,000 to $2,500 |
| Inverter generator | $500 to $4,000 |
| Standby unit, hardware only | $3,000 to $6,000 |
| Whole house standby, installed | $7,000 to $15,000 |
The jump between rows is mostly about power and permanence. A portable you set up by hand costs a fraction of a system wired into your panel to start on its own.
Portable and Inverter Generators
A portable generator is the budget entry to backup power, running a few essentials during an outage for a few hundred to a couple thousand dollars. Inverter generators cost more for the same wattage because they produce cleaner power that is safe for sensitive electronics and run quieter, which is why they command a premium.
Standby and Whole House Systems
A standby generator is a different class of purchase. The hardware alone is several thousand dollars, and it has to be installed by professionals with a transfer switch and a fuel hookup, which is why a finished whole house system lands between seven and fifteen thousand dollars, and more for the largest homes.
What Moves the Price
Within any type, wattage is the biggest lever, since more power costs more to build. After that it is features: electric start, inverter technology, fuel flexibility, and for standby units the size of the transfer switch and the complexity of the install. Two portables of the same size can also differ on build quality and warranty.
Buy for the load you actually need to run, not the biggest number on the shelf. Oversizing a generator wastes money up front and burns more fuel every hour it runs.
Do Not Forget Running Costs
The purchase is only part of it. A generator burns fuel, needs oil changes, and the occasional carburetor clean or tune up, and a standby unit needs periodic service to stay ready. Budget a little each year for upkeep, since a well maintained generator is the one that actually starts when the power goes out.
Frequently Asked Questions
How much does a generator cost?
From about $500 for a small portable to $15,000 or more for a whole house standby installed. Portables are $500 to $2,500, inverters $500 to $4,000, and standby hardware $3,000 to $6,000 before installation.
Why are inverter generators more expensive?
They produce cleaner, more stable power that is safe for sensitive electronics and run quieter and more efficiently. That technology costs more than a conventional portable of the same wattage.
How much is a standby generator?
The hardware runs $3,000 to $6,000, but a standby needs a professional install with a transfer switch and fuel hookup, so a finished whole house system lands between $7,000 and $15,000.
What makes one generator cost more than another?
Mostly power output, then features like electric start, inverter technology, and fuel options. For standby units the transfer switch and install complexity add a large share of the total.
What are the ongoing costs of a generator?
Fuel, oil changes, and the occasional carburetor clean or tune up, plus periodic service on a standby unit. A modest yearly budget keeps it reliable and ready to start.
