*The Angi rating for Generator Install companies in Cornelius, NC is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.
*The HomeAdvisor rating for Generator Install companies in Cornelius, NC is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.
Last update on February 12, 2026
Serving Cornelius, NC and surrounding areas
Approved
In business since 1988
Free estimates
Emergency services offered
"Christian was helpful, answering my questions and showing me where my generator could be placed and explained the installation process, His visit was not to repair a generator, but to get me a quote."
+13
Serving Cornelius, NC and surrounding areas
Approved
In business since 2007
Free estimates
Credit card accepted
"The team from the office to the tech all the way to the head of the company was great. They came out and knocked out the projects I had lined up. They were very professional and cleaned up once they were done. I would definitely hire again!"
+23
Serving Cornelius, NC and surrounding areas
Approved
In business since 1996
Free estimates
Emergency services offered
"Great follow through, good pricing. The generator required several trips and follow-up items because it required different inspections. They did a great job at following up on these steps and the generator works perfectly. Since that time we called them for some smaller electrical jobs. They are very detailed oriented, an example would be that I gave what I thought I wanted and they gave feedback based on their experience showing a better way to do it. I welcomed this and was happy they suggested it."
+2
Serving Cornelius, NC and surrounding areas
Approved
In business since 2005
Free estimates
Warranties offered
"Good job. reasonable price for install. Would definitely hire again."
+18
Serving Cornelius, NC and surrounding areas
Approved
In business since 1998
Free estimates
Customers say: Terrific value
"Offered to come later on the same day I called to request service. Installed a new 120V outlet for a stove. Quick service, great price, and a really nice guy!"
Serving Cornelius, NC and surrounding areas
Approved
In business since 2017
Free estimates
Emergency services offered
"Our tech Rob Craven did an excellent job! Very polite and professional, he installed it easily and cleaned up afterwards. Will definitely call NuBlue again for any electrical needs we may have."
+80
Serving Cornelius, NC and surrounding areas
Approved
Emergency services offered
Credit card accepted
Customers say: True professional
"Went great, he picked a/c unit. Installed unit including the duck work. Wired unit in with bigger wiring (wire to code) and breaker. Very happy with the work done. I would highly recommend this company. Jason ever professional, I will be doing business again with him."
Serving Cornelius, NC and surrounding areas
Approved
In business since 2005
Free estimates
Warranties offered
"Matthew was prompt and direct in his recommendations. We were not entirely sure of our options and he ultimately recommended a cheaper solution! In this case, we were looking to have all the outlets grounded in our home, and, based on the area and our needs, Matthew offered the idea that we install a sort of surge protector for the entire house."
Serving Cornelius, NC and surrounding areas
Approved
In business since 2015
Free estimates
Customers say: True professional
"Overhead light installed and 4 quad receptacles. Brian responded with an estimate and the installation was two days later. Job completed within 2.5 hours. Very professional and congenial. He is reasonably priced, and I would use his services again. Highly recommend."
Serving Cornelius, NC and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Emergency services offered
"Drew, the owner of Walker Electric was the technician that actually showed up to do the work. I had him install a ceiling exhaust fan in my bathroom. He did excellent work replacing the old one with new and didn’t do any unnecessary drywall damage. I also had Drew install under cabinet strip lighting in my kitchen that came out looking wonderful. His pricing was more than reasonable and his quality of work was top notch. I would recommend Walker Electric for any of your electrical needs and I will absolutely be using them again in the future!"
+12
When maintained properly, a whole-house generator can last up to 20 years. Costs to maintain and repair generators vary by location and type of generator, but you can expect to pay about $150 to $300 per year for annual generator maintenance checks. An experienced generator service technician will inspect your generator’s engine filter, starting mechanism, fuel, lubrication, and coolant levels to keep your generator in good working condition for as long as possible.
Installing a whole-house generator costs about $5,000 on average. Prices range from $1,550 to $8,500, depending on size, brand, fuel type, and assembly. The size of your whole-house generator is the most significant cost factor, with large homes with high energy demands costing the most to power. Types of whole-home generators include:
Portable generators with 1kW–7.5kW capacity: $500–$2,000
Partial generators with 9kW–20kW capacity: $2,000–$6,300
Whole-house generators with 22kW–48kW: $5,000–$18,000
When choosing the right size generator for your needs, consider a few items to help calculate the wattage you’ll need. Start by determining which household items and appliances you want to power, and then add the wattages together. Check out the wattage of these essential appliances:
Refrigerator: 600 watts
Large dehumidifier: 700 watts
Large window air conditioner: 1,400 watts
Water heater: 3,000 watts
Running home appliances like these requires a partial or whole-house generator. A portable generator may be enough to power your home if you only plan to keep a refrigerator and freezer running.
Here’s what you can run with different wattages and types of generators:
Portable generator:
2,000 watts can handle a large appliance like a freezer or refrigerator, plus a few smaller items like phones or computer chargers.
4,000 watts will keep two large appliances operating and a few smaller devices.
8,000 watts should power most essential appliances and other devices, including a sump pump, well pump, or your dishwasher.
Partial to whole-house generator:
20,000 watts and above will make it seem like your home’s power is still on.
The value of installing a whole-house generator is that your home has guaranteed power, even if the power grid in your area is down. Whether a whole-house generator is worth installing in your home depends on how often you use it, your home’s location, and your lifestyle. For example, installing a whole-house generator is likely worth it if you:
Experience frequent or prolonged power outages
Work from home
Store a lot of cold food
Have a sump pump
Have a pump for well water
Use electronic medical devices
Live in a climate requiring heating or cooling
From average costs to expert advice, get all the answers you need to get your job done.
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Natural gas generators are whole-home standby generators that are connected to your home’s natural gas line. The average cost for a natural gas generator is $12,000.
Generators should give you peace of mind, but you’ll only get that if your installer knows what they’re doing. Learn how to hire a pro and what red flags to look for.
Portable generators are handy for many reasons, but they require care to prevent fire, electrocution, and more. Stay safe with this guide on how to use a generator.
Having a back-up power source in case of emergency is important. Here’s how to use a generator to power your house.
