Home Generator Installation in Smithtown, NY

Power Stays On When the Grid Goes Down

Automatic backup for your whole house. No refueling, no scrambling in the dark, no wondering if your sump pump quit while you’re at work.

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Whole House Generator Installation Smithtown, NY

What You Get With a Standby Generator

Your refrigerator keeps running. Your heat stays on in January. Your medical equipment doesn’t shut off because a transformer blew three streets over.

That’s what a home standby generator installation does. It kicks on automatically within seconds of losing grid power, runs on your existing natural gas or propane line, and keeps your house functional until PSEG gets the lights back on. You don’t flip a switch or drag out extension cords.

If you lived through Sandy or Isaias in Smithtown, you already know what two weeks without power feels like. Generator systems prevent that. They’re wired directly into your electrical panel with an automatic transfer switch, so the moment your utility feed drops, your backup system takes over. Everything you chose to protect stays live.

Most whole house generator installations in Smithtown run between $8,000 and $15,000 depending on your home’s size and what you want covered. That includes the generator, transfer switch, gas line work if needed, permits, and labor. It’s not an impulse buy, but it’s also not a luxury when you’re comparing it to hotel bills, spoiled food, or frozen pipes.

Licensed Generator Installers Serving Smithtown

We've Been Wiring Smithtown Homes Since 2004

We’re a fully licensed and insured electrical contractor based in Bohemia, covering all of Suffolk County. We’ve handled hundreds of backup generator installations across Smithtown, from smaller 13kW units on Kings Park homes to 26kW Generac whole house generators for larger properties near the Nissequogue River.

You’re not getting a national franchise or a crew that showed up last year. You’re working with electricians who’ve been here for over 20 years, who know Suffolk County’s permit process, and who’ve earned the Angie’s List Super Service Award seven years running.

We give you upfront pricing before the job starts. No surprise bills after the install. If something needs clarification, you’ll hear it during the estimate, not after we’ve already dug the trench.

How Home Generator Installation Works

Here's What Happens From Estimate to Activation

First, we come out and assess your electrical panel, your fuel source, and where the generator will sit. Most installs go on a concrete pad outside, close to your gas meter or propane tank. We’ll measure your home’s power needs and recommend a unit size that actually matches your load—not the biggest one we can sell you.

Once you approve the estimate, we pull permits through the Town of Smithtown and schedule the install. The job typically takes one to two days depending on how much gas line or electrical work is involved. We set the generator, run the fuel line, install the automatic transfer switch inside your panel, wire everything to code, and test the system under load.

After the install, we walk you through how it operates. You’ll see how it self-tests weekly, how to check the oil, and how the mobile monitoring works if your unit has it. Then we contact the town for final inspection. Once that clears, your system is live and you’re covered.

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About Marra Electric

What's Included in Generator Installation

Everything Required to Go From Zero to Backup Power

A complete home standby generator installation in Smithtown includes the generator unit itself, the automatic transfer switch, all wiring and conduit, the concrete pad or mounting platform, gas line extensions if your meter isn’t close enough, permits, and inspections. We coordinate everything.

You’re not hiring one contractor for the pad, another for the gas work, and a third for the electrical. It’s one crew, one timeline, one point of contact. If your generator needs a 200-amp transfer switch upgrade because your current panel won’t support it, we handle that too.

Smithtown sits in a high-risk storm zone. Between nor’easters rolling off the Sound and tropical systems tracking up the coast, you’re looking at multiple outage events per year. A whole home generator installation removes that variable. Whether it’s a three-hour outage or a three-day blackout, your house stays operational.

Most Smithtown homes we work on run a Generac whole house generator between 13kW and 22kW. That covers your essentials—heat, refrigeration, some outlets, lights—or your entire panel if you size up. The units are weather-rated, designed to sit outside year-round, and built to fire up in subzero temps or summer storms.

How much does a whole house generator cost to install in Smithtown?

You’re looking at $8,000 to $15,000 for most whole house generator installations in Smithtown, NY. That covers the generator, automatic transfer switch, installation labor, concrete pad, gas line work if needed, permits, and inspections.

The range depends on your home’s size and how much you want to power. A 13kW unit that covers your essentials—fridge, furnace, some lights, a few outlets—runs cheaper than a 22kW system that keeps your entire panel live, including central air. If your electrical panel needs an upgrade to handle the transfer switch, that adds to the cost.

We give you a fixed price after the site visit. No hourly rates, no surprise charges after we open the panel. You’ll know what the job costs before we pull permits.

How long does a home generator installation take in Smithtown?

Most home standby generator installations in Smithtown take one to two days once permits clear. Day one is usually setting the pad, placing the generator, running the gas line, and roughing in the electrical. Day two is finishing the transfer switch, wiring everything into your panel, testing the system, and cleaning up.

If your install is straightforward—gas meter is close, panel has capacity, no underground obstacles—we’re usually done in a day. If we’re running 40 feet of gas line, upgrading your transfer switch, or dealing with ledge rock where the pad goes, it might stretch into day two.

Permitting through the Town of Smithtown adds time on the front end. We handle that process, but it’s not instant. Plan on a few weeks from estimate to install date, depending on the town’s workload and our schedule.

Do I need a permit for a generator installation in Smithtown, NY?

Yes. Smithtown requires both an electrical permit and a building permit for home generator installations. You’ll also need a gas permit if we’re extending or modifying your natural gas line.

We pull all the permits as part of the installation. You don’t have to visit Town Hall or deal with the paperwork. Once the install is done, we schedule the inspections and coordinate with the building department to get your system signed off.

Skipping permits isn’t worth it. If you ever sell your house, an unpermitted generator shows up during the home inspection and kills deals. It also voids your warranty and creates liability if something goes wrong. Do it right the first time and you’re covered.

Will a generator power my whole house during an outage?

It depends on the size of the generator and what you want to run. A properly sized whole house generator can absolutely power everything in your home—central air, electric range, well pump, all outlets and lights. But that requires a larger unit, usually 20kW or higher, and costs more.

Most Smithtown homeowners choose a mid-range setup that covers essentials: heating system, refrigerator, freezer, sump pump, some lighting, and a few outlets. That keeps your house safe and functional without paying for capacity you don’t need during an outage.

We calculate your actual load during the estimate. You tell us what matters most, we add up the wattage, and recommend a generator size that fits. If you want whole-home coverage, we’ll spec that. If you just want to keep the basement dry and the food cold, we can do that for less.

What kind of maintenance does a home standby generator need?

Your generator needs an oil and filter change once a year, along with a battery check, air filter replacement, and a full system test under load. Most manufacturers recommend annual service to keep the warranty valid.

Generac and other standby generators self-test once a week automatically. They’ll run for 10-15 minutes, cycle through the system, then shut down. You’ll hear it, but it doesn’t use much fuel. That weekly test keeps the engine lubricated and the battery charged.

We offer maintenance plans if you don’t want to track it yourself. One visit per year, we handle the service, check the transfer switch, inspect the fuel connections, and make sure everything fires up correctly. It’s cheaper than dealing with a no-start during the next big storm.

How long can a natural gas generator run continuously during a power outage?

A natural gas home generator can run indefinitely as long as your gas supply stays live. There’s no tank to refill. The unit pulls fuel directly from your gas line, the same one feeding your furnace and stove.

Most manufacturers rate their residential generators for unlimited run time at partial load, or several days straight at full load before needing a cooldown. Generac’s air-cooled units, which are common in Smithtown installs, can handle multi-day outages without issue.

The longest outages we’ve seen in Smithtown after major storms ran about two weeks. Your generator will outlast the blackout. The only thing you’re watching is the oil level if it’s an extended run, but most modern units monitor that automatically and will alert you if something’s off.

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Smithtown, NY is located in Suffolk County in New York State

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