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Avatar for Elevation Electric, LLC
Elevation Electric, LLC
4.8(
54
)

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
)

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 time1 day
14 neighbors recently requested a quote
Avatar for Productive Electric, LLC
Productive Electric, LLC
4.9(
14
)

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
12 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Absolute Electrical, Heating & Cooling, LLC
Absolute Electrical, Heating & Cooling, LLC
4.3(
328
)

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
2 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for TORQ Electric
TORQ Electric
4.8(
19
)

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

+8

59 neighbors recently requested a quote
Recommended by42%of homeowners
Avatar for True Bloom Energy Solutions LLC
True Bloom Energy Solutions LLC
5.0(
6
)

Serving Centennial, CO and surrounding areas

Approved

Credit card accepted

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

12 neighbors recently requested a quote
Avatar for Mr. Electric of Littleton
Mr. Electric of Littleton
4.6(
11
)

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%
2 neighbors recently requested a quote
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Showing 1-10 of 152
Generator Install questions, answered by experts

To determine the right size generator for your house, you should calculate the total wattage of the appliances and devices you want to power during an outage. List all essential items, note their start-up wattages, and add them together.

Here are some typical wattage requirements for common appliances:

  • Refrigerator: 600 watts

  • Large dehumidifier: 700 watts

  • Large window air conditioner: 1,400 watts

  • Water heater: 3,000 to 4,500 watts

  • Electric furnace: 5,000 to 25,000 watts

A 7,500-watt generator might be sufficient for essentials like a refrigerator, freezer, well pump, and lighting circuits. However, for high-demand items like a water heater or furnace, a whole-home generator is a better choice. A portable generator may be enough if you only need to power a few critical items.

While home square footage can offer a rough estimate, it is not always a reliable indicator. For reference, here are some typical generator sizes based on square footage:

  • 1,000 sq ft: 6–9 kW

  • 1,500 sq ft: 7–10 kW

  • 2,000 sq ft: 10–14 kW

  • 2,500 sq ft: 12–16 kW

  • 3,000 sq ft: 16–20 kW+

For the most accurate sizing, consult a professional who can calculate your home's peak and average power consumption and recommend the optimal generator.

Portable generators provide backup power for essential appliances during outages and are easy to relocate.

Yes. You can connect your home back-up battery to a generator with its designated charger. Be sure that the output of the generator matches the input requirements for the battery for best results.

Yes, installing a generator usually increases your property value because buyers are getting the added peace of mind knowing they’ll be able to maintain power through blackouts. In most cases, you should see close to a 100% return on investment (ROI). Keep in mind that home generators usually need a permanent foundation, and installing a concrete slab will likely raise your property taxes slightly.

No, you should never plug a generator directly into a wall outlet in your house. This practice is extremely dangerous, often illegal, and can cause "back-feeding," where power from the generator flows back into utility lines, creating a life-threatening hazard for utility workers. It can also damage your home's electrical system, including appliances like pumps and HVAC fans. If the main power is restored while the generator is connected, it can destroy the generator and cause an electrical fire. To safely connect a generator, you must use a professionally installed transfer switch or an interlocking kit, which prevents back-feeding by disconnecting your home from the utility grid before the generator provides power.

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.