How Long Does It Take To Install A Generac Home Generator?

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September 13, 2025

Picture this: You’re halfway through the big game, and you’ve waited all year for it. All your friends are round, the drinks are flowing, food is being enjoyed, and then there’s a flicker in your lights. Boom, the Wi-Fi dies, and suddenly you’re sitting in darkness, wondering what on earth is going on.

Spoiler alert: it’s not the end of civilization; your power has just gone out again.

Enter the Generac backup home generator, the superhero of standby power, the emergency service you didn’t know you needed. It’s your home’s guard dog quietly standing by on watch, waiting for that one time it needs to jump into action and offer protection.

Sound like something you need?

When looking at getting a new generator for their home, people naturally often wonder how long it actually takes to install one of these lifesavers. Are you talking weeks, or is it more of an afternoon type of job?

Here’s the thing: It’s a one-day install. That’s right; it only takes, on average, one day to install a Generac backup home generator for residential properties. During this time, the customer will only experience 2-3 hours of no power while it gets set up. So while it can’t save you after the fact, it’s pretty minimal in terms of disruption to your life.

Generac generator with top lifted up against brick wall

What Can You Expect When Having a Generac Home Generator Installed?

As we mentioned, when it comes to how long it takes to install a Generac home backup generator, it’s typically one full day unless the crew experiences unforeseen circumstances.

In that one day, you can expect the crew to turn up with a plan and everything they need. They will have done their homework so they can work, causing as little disruption to your life as possible.

They will have pinpointed a more discreet location similar to where you’d place an air conditioning unit ahead of time, and upon arrival, they will prep the base. Once the base is complete, the generator will be hooked up to fuel (either natural gas or propane).

Then comes the bit that obviously makes people a little bit nervous.

Because while the team has been working hard to get the generator in place and ready, they will need to disconnect power to complete the job. Your home will lose all power for a few hours, as this is when the generator is connected to your home’s electrical panel. But, by the end of the day, you will have your very own standby power supply to rely on if you need it.

Why Do I Need To Lose Power?

If the Generac home generator is a backup standby power source for residential properties, why does my home need to lose power for the generator to be connected?

This is a valid question because the generator needs to be connected to your home’s electrical supply so it can flip on automatically when your power goes out. And this means your electrical panel needs to be rewired safely to allow for this. A little downtime now prevents a lot of stress down the line when you need the generator to kick in.

Is There a Lot Of Noise

You don’t want a generator that sounds like a jet engine taking off from under your house, we get it. And the good news is the Generac home generator is more of a low, steady hum like an air conditioning unit rather than a plane readying to take off.

But is it noisy during installation? Like anything being installed in your home, you should expect general construction noise. This means tools, testing, people talking, etc., but this is just for the short time it takes to install a home generator, so just one day of noise, and then surprisingly, the unit is relatively unobtrusive.

How Much Disruption Will It Cost?

The bulk of the disruption you will experience during a Generac generator installation will be the few hours it takes to connect it to your electrical supply. The installation is intended to be as seamless and efficient as possible to minimize disruption to residents and surrounding residential properties. If things aren’t going to plan, our team will converse with you to explain the situation and any further disruption you might experience. However, we aim to uncover any potential problems so we can be prepared for the time prior to installation to prevent this from happening.

Why Do I Need A Generac Home Generator?

Power outages are inconvenient, and at Wells Electric Service, we recommend the Generac backup generator to all our clients for added peace of mind and complete reliability for those times you’re without power. And for a few hours of downtime when the generator is installed, you will then have a backup power source you can rely on should you need it. There will be no panic, no stress, just a seamless transition from your electrical circuit to the backup generator when you need it.