Home Standby Generator Service and Installation

A home standby generator connects directly to your home's electrical system and fuel supply. When the grid drops, it detects the outage within seconds and starts itself automatically. No extension cords, no gas station runs, no manual startup.

Call a licensed local electrician now for a free quote on home standby generator installation.

What a Home Standby Generator Does

A standby unit sits on a concrete pad outside, wired to an automatic transfer switch installation at your electrical panel. The transfer switch monitors grid voltage around the clock. When it detects a power loss, it disconnects your home from the utility, starts the generator, and restores power in under 30 seconds.

Most standby generators run on natural gas or liquid propane piped directly from your existing supply, so there is nothing to refuel during a multi-day outage. If you want to weigh your options first, our guide to compare portable generators vs. standby units breaks down the key differences.

Signs Your Home Needs a Standby Generator

You are a strong candidate if any of these apply:

• Power outages in your area last several hours or happen more than once or twice a year
• A family member uses a CPAP, oxygen concentrator, dialysis machine, or other home medical equipment
• You work from home and need reliable power and internet throughout the day
• A basement sump pump protects your home from flooding
• You have lost a refrigerator or chest freezer full of food during a past outage

What Size Do You Need?

Generator capacity is measured in kilowatts (kW). The right size depends on what you need to keep running:

• 10 to 14 kW: Essential circuits only, covering the furnace, refrigerator, a few lights, and a sump pump
• 16 to 20 kW: Adds central air conditioning and more of the home
• 22 kW and above: Whole-house coverage, including multiple large appliances running at the same time

A licensed electrician performs a load calculation before recommending a size. Undersizing causes the generator to shut down under load; oversizing wastes money on equipment and fuel.

Fuel Options

Natural gas is the most convenient choice if your home already has a gas line. Supply is continuous, and you have nothing to store or refill.

Liquid propane is common in rural areas without natural gas service. It requires an on-site tank and scheduled deliveries, but propane stores indefinitely and performs reliably in cold weather.

What Installation Involves

The installation sequence, once permits are approved:

1. Site survey and load calculation
2. Permit applications covering electrical, gas, and building permits for the concrete pad
3. Concrete pad poured or a pre-cast pad set; generator anchored
4. Gas line connected by a licensed plumber or gas fitter
5. Transfer switch installed at the main panel by a licensed electrician
6. Final inspection, startup test, and homeowner walkthrough

For a detailed look at each step, see our full guide on whole-house generator installation.

What Affects the Cost

The installed price depends on:

• Generator size: Larger whole-house units cost significantly more than essential-circuit systems.
• Fuel type: A new propane tank and gas-line work add to the total. Natural gas is simpler when a line already reaches your home.
• Permits, pad, and labor: Permit fees vary by jurisdiction; a poured concrete pad costs more than pre-cast; transfer switch type affects labor time.

Permits, Placement, and Noise Rules

Every municipality requires at least an electrical permit and a gas permit. Many also require a building permit for the concrete pad. Your installer pulls these for you.

Placement rules also apply. Most jurisdictions require at least 5 feet of clearance from windows, doors, and property lines. Some municipalities enforce noise ordinances that limit generator decibel levels, which affects which models you can install in certain spots. Ask about local rules before committing to a placement, because moving the unit later is a significant added expense.

While your electrician is on-site, consider adding whole-home surge protection at the same time. Generator startups and shutdowns create brief voltage fluctuations that can stress appliances and electronics.

Keeping Your Generator Ready

A standby generator runs a brief self-test once a week, which takes a few minutes. Beyond that, the maintenance routine is straightforward:

• Annual professional service: oil change, air filter, spark plugs, coolant check, battery inspection
• Oil change every 200 run hours: especially important after extended outages
• Battery replacement every 3 years: the starter battery is what gets the engine going; do not skip it

With proper maintenance, a standby generator typically lasts 20 to 30 years.

Frequently Asked Questions

Can I install a standby generator myself? No. A licensed electrician handles the transfer switch and panel work; a licensed plumber or gas fitter connects the fuel line. Most municipalities will not issue permits for DIY installation, and your homeowner's insurance may not cover an unpermitted unit.

How long does installation take? One to two days on-site, plus a few days to several weeks for permit approval depending on your local building department.

Does a standby generator run on natural gas or propane? Most run on one or the other. Your installer will recommend the right fuel based on what is already available at your home.

Do I need a permit? Yes, in virtually every jurisdiction. Your installer pulls the required permits as part of the job.

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A properly sized and installed standby generator runs for decades with minimal attention. To get yours done right, find a licensed electrician near you.

Call a licensed local pro now for a free quote on home standby generator installation.