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Avatar for Elevation Electric, LLC
Elevation Electric, LLC
4.8(
54
)
Fixed Generator - Install

Serving Centennial, CO and surrounding areas

Approved

In business since 2014

Free estimates

Warranties offered

"I chose Elevation Electric to install an outlet in our garage for our new Nissan Leaf because he was the ONLY installer recommended on both the Xcel Energy site and here. I heartily agree. Our new outlet is in a great spot and works perfectly. Joe worked quickly, had to drill through brick walls and cleaned up the mess. He was forced to cancel our initial appointment due to complications on the job before ours. So what did he do? He rescheduled for a Saturday because he hated to have inconvenienced us with the cancellation and he was already booked for the next week. Nice guy, good work!"
Response time2 days
1 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for New Phase Electric, LLC
New Phase Electric, LLC
5.0(
7
)
Fixed Generator - InstallPortable Generator - Install

Serving Centennial, CO and surrounding areas

Approved

In business since 2000

Free estimates

Small jobs welcome

"Installed a 12 circuit generator cutover panel. Works great. Would have preferred the cables to be behind the drywall. But a solid job that passed Jeffco and Xcel inspections easily."
Brent's house
custom house
Custom light's
custom lights
Govee lights

+1

Response time2 days
Response rate100%
5 neighbors recently requested a quote
Avatar for JL ENGINEERING SERVICES LLC
JL ENGINEERING SERVICES LLC
5.0(
14
)
Portable Generator - Repair

Serving Centennial, CO and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

"Jesus, replaced and repaired multiple Fire Alarms and installed multiple light fixtures. I have also used his lawn service for replacing sprinklers heads and blow outs. I HIGHLY recommend Jesus and have plans to use his team again."
5 neighbors recently requested a quote
Avatar for Productive Electric, LLC
Productive Electric, LLC
4.9(
14
)
Generator - Install - For Business

Serving Centennial, CO and surrounding areas

Approved

In business since 1992

Free estimates

Credit card accepted

"Tom was great at installing my RV outlet. Out of the 3 different quotes I received, he was able to get it done without trying to talk me into more expensive options. He was also accommodating with my somewhat busy schedule and very responsive throughout the install planning process. I would highly recommend Productive Electric."
Response time1 day
8 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Absolute Electrical, Heating & Cooling, LLC
Absolute Electrical, Heating & Cooling, LLC
4.3(
328
)
Fixed Generator - Install

Serving Centennial, CO and surrounding areas

Approved

In business since 2013

Free estimates

Emergency services offered

"In 2 days I had absolute out for a/c problem and to install a new attic fan system. Hector, Jovanny were the 2 main contacts for the projects. Very professional, explained what they were doing and answered any questions I had. Will definitely use absolute again."
Mini Split
Heated driveway
Furnace Inspection
Laying conduit for exterior electrical work
Electrical Panel Replacement

+34

Response time1 day
Recommended by91%of homeowners
Avatar for Just In Time Electrical Services
Just In Time Electrical Services
4.9(
32
)
Fixed Generator - InstallPortable Generator - Install

Serving Centennial, CO and surrounding areas

Approved

In business since 2019

Free estimates

Warranties offered

"Just In Time installed a new attic fan and temperature control. The experience was great from start to finish. The first visit was a diagnosis and then an appointment was scheduled to replace the old fan with a new fan. The install of the fan was an excellent experience. The crew was able to arrive early, they confirmed it was OK to show up early prior. The install went smooth, the crew was efficient, friendly and cleaned up in no time. I would recommend and use Just in Time in the future!"
Response time6 hrs
5 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for TORQ Electricians
TORQ Electricians
4.8(
19
)
Portable Generator - Install

Serving Centennial, CO and surrounding areas

Approved

Super Service Award Winner

In business since 2012

Free estimates

Emergency services offered

"I’m extremely pleased with the work Jon from TORQ Electricians recently completed in my home. This project was much larger than his visit the week before, and once again he delivered outstanding results. He replaced switches and outlets throughout the house, many of which had begun to fail due to age, and the upgrades have given us real peace of mind when it comes to safety. Jon also made several thoughtful recommendations—installing dimmer switches in the kitchen and study, and suggesting a different dimmer style for our living room ceiling fan. These changes have noticeably improved both the functionality and the atmosphere of those rooms. He even identified and replaced a GFCI breaker in the panel that wasn’t up to code, ensuring everything is now safe and compliant. The work has refreshed the look of our interior, and we couldn’t be happier with the results. We’re very glad we chose TORQ Electricians and highly recommend Jon to anyone needing professional, reliable electrical work"
20 Amp Circuit
Circuit
Electrical Panel
Outlet
Power Stake

+9

34 neighbors recently requested a quote
Recommended by42%of homeowners
Avatar for Mr. Electric of Littleton
Mr. Electric of Littleton
4.6(
11
)
Portable Generator - Install

Serving Centennial, CO and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"Sean, was courteous and knowledgeable. he got the work done very quickly and to my satisfaction. he tested the outlets in front of me so I can verify the correct settings on test meter"
Can Lights
Response time10 mins
Response rate100%
1 neighbors recently requested a quote
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Generator Install questions, answered by experts

A home that is 2,500 square feet will likely need a 20kW to 25kW generator. Consult your local generator installer to confirm the generator size needed to power your home before purchasing a new one. Be sure to consider how much power your necessary devices need to run.

Generators run on a variety of fuel types, ranging from natural gas to solar power. Keep in mind that fuel costs varying by type:

  • Natural gas: $2,000–$21,000 per year 

  • Liquid propane: $2,000–$21,000 per year

  • Diesel: $3,000–$20,000 per year

  • Gasoline: $500–$3,000 per year

  • Solar generator: $2,000–$25,000 per unit

  • Battery backup: $10,000–$25,000 per unit

In many cases, yes. There are models called dual-fuel generators and fuel switches, but only between certain types of fuel. For example, with the right setup you can convert a generator from natural gas to propane. Some allow switching between diesel and gasoline. There are even tri-fuel generators available in some cases, which adds a large layer of security if you are worried about fuel availability in times of crisis. Always check your generator capabilities and manual instructions before trying to switch fuels. Some generators can use another fuel but may need a fuel conversion kit to prep them first.

You can expect a diesel generator to last for up to 30,000 hours of use, which works out to 20 to 25 years with the proper maintenance, of course. That depends on how much you use it, so a diesel generator used for emergencies a couple of times a year will last a lot longer than a generator that takes over for a faulty electrical grid every month for a day or two. 

Yes, in most municipalities, you will need a permit to install a permanent home generator, including emergency backup, partial-home, and whole-home models. Because these installations involve significant alterations to your home's electrical system and produce exhaust fumes, local governments often require a permit or inspection for safety purposes. A generator permit typically costs between $50 and $250, depending on your location. Your electrician or certified installer can usually handle the permitting process for you, but you will be responsible for the cost. It's a good practice to confirm with your installer that they will pull all necessary permits before work begins.

The Centennial, CO homeowners’ guide to generator installs

From average costs to expert advice, get all the answers you need to get your job done.