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Residential electrical service

Standby & Backup Generator Installation

St. Louis weather does not ask permission. Summer derechos, ice storms, and spring thunderstorms take down power across St. Charles County and the metro every year, sometimes for days. A standby generator with an automatic transfer switch restores power to your home in seconds, whether you're home or not.

Caito Electric installs and wires standby generators from Generac, Kohler, Cummins, and Briggs & Stratton, and we install manual transfer switches and inlet boxes for homeowners who prefer a portable generator. We coordinate the gas connection, the concrete pad, the permit, and the inspection so you have one contractor to deal with.

Smiling homeowner with a portable generator during an outage
Smiling homeowner with a portable generator during an outage

What's included

  • Whole-home and essential-circuit standby generators (10kW to 48kW+)
  • Automatic transfer switch installation and load management
  • Portable generator inlet boxes and manual transfer switches
  • Natural gas and propane generator wiring
  • Commercial standby power for offices, clinics, and small facilities
  • Annual maintenance and battery/transfer switch testing

Sizing your generator

The right size depends on what you want to run. An essential-circuit system covers the furnace, refrigerator, sump pump, well pump, and a few lighting circuits. A whole-home system carries central air conditioning, the water heater, and everything else. We run a load calculation on your actual home rather than guessing from square footage.

Why sump pumps make generators a priority here

Many homes in St. Peters, O'Fallon, Chesterfield Valley, and the Florissant area rely on sump pumps that run hardest during the same storms that knock out power. A generator with the sump pump on its circuit is flood insurance you control.

Serving St. Charles County & the St. Louis Metro

We provide standby generator installation throughout St. Charles County, including St. Charles, St. Peters, O'Fallon, Wentzville, Lake St. Louis, Cottleville, as well as St. Louis City, St. Louis County, and surrounding communities within 75 miles. See all service areas.

Questions about standby generator installation

How long does a standby generator installation take?

Most residential installs are completed in one to two days once the unit and gas service are on site. Permitting and utility coordination can add a week or two to the overall timeline.

Do you install the gas line too?

We coordinate with a licensed gas fitter for the fuel connection and handle all electrical work, the transfer switch, and the inspection.

Is a portable generator with an inlet a good option?

For many homeowners, yes. A properly wired inlet and manual transfer switch lets you safely power selected circuits from a portable generator without dangerous extension cords or back-feeding.

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