Whole-home standby generator installation

What a standby generator does

A standby generator is wired into your electrical system through an automatic transfer switch. When the grid fails, the switch senses it, the generator starts, and within seconds power flows to the circuits it covers. When the grid comes back, the switch moves you back to utility power and the generator shuts down after a cool-down period. You do not have to be home for any of it.

That matters in northern Westchester, where wooded streets and overhead lines mean storms can leave homes without power for days. A standby unit keeps the heat, well pump, sump pump, fridge and lights going, and a larger unit can run the whole house.

What goes into a proper installation

A good installer starts with a site visit. They look at your panel, your gas meter or propane plans, and where the unit can legally and sensibly sit. Then they give you a written quote that spells out what is included.

• Load calculation to size the generator for what you want to run
• Transfer switch sized for your service, often 200 amps for a whole-home setup
• Pad or base that is level and suited to your yard
• Fuel connection by a qualified gas fitter, including any gas meter upgrade the utility requires
• Electrical permit and inspection pulled by the contractor
• Start-up and walkthrough so you know how the unit and its alerts work

Sizing in plain terms

Generators are sized in kilowatts. Smaller air-cooled home units cover essential circuits. Mid-size units can run most of a typical house. Larger homes with central air, electric cooking or several big loads may need a large air-cooled unit or a liquid-cooled model. Some installers use load management modules that let a smaller generator run the whole house by holding back big appliances until there is room. Ask for the sizing in writing and ask what will and will not run.

Placement, noise and local rules

Manufacturers set minimum clearances from windows, doors, vents and other openings because generators make exhaust. Many villages and towns in Westchester also have setback and noise rules, and some have extra review in historic districts. Your contractor should check these before choosing a spot and should pull the permit. Most standby units run a short self-test on a schedule, so it helps to pick a time that suits you and your neighbors.

How to compare quotes

Check that each quote names the generator model and size, the transfer switch, the fuel work, the pad, the permit and who handles the inspection. Ask about the manufacturer warranty and whether the installer registers it. Confirm the contractor holds a Westchester County home improvement license and carries insurance. A lower number that leaves out the gas work or the permit is not really lower.

Typical standby generator costs

Published national ranges. Westchester jobs often fall toward the higher end.

Ranges are national averages from the sources below, not quotes. Your price depends on size, fuel, distance to the panel and meter, and any upgrades.

Sources: HomeGuide; Angi