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Avatar for Mr. Electric of Gastonia
Mr. Electric of Gastonia
4.8(
61
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+2 more

Serving Mount Holly, NC and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Emergency services offered

"Mr. Electric was very professional, courteous, and knowledgeable about my project! The rep did an amazing job, showing up early, and making sure everything was neat when he finished. I would definitely recommend them for future electrical projects!"
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+89

4 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Walker Electrical Services
Walker Electrical Services
5.0(
11
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Mount Holly, NC and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Emergency services offered

"Drew Darien with Walker Electrical went way beyond my expectations. He started remodeling two bathrooms changing out boxed fluorescence lighting and completely opened up our bathroom with LED recessed lighting. Drew added under cabinet lighting to our vanity and through our shower. Scones and pendants were added as well. His work was so precise that he went on to remodel our kitchen. As my lead on this project, Drew worked extremely well with other contractors. Drew was timely throughout every step of the project, hard working, on time and budget, and highly creative in his design. I wholeheartedly recommend Walker Electrical for any project."
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+12

Response time8 hrs
Response rate95%
Recommended by9%of homeowners
Smart Power Source, Inc.
4.6(
11
)
Fixed Generator - Install

Serving Mount Holly, NC and surrounding areas

Approved

In business since 2023

Free estimates

Credit card accepted

"I had been reaching out to other vendors and had a hard time getting a call back. Jason got back to me quickly and answered every question and concernI had about generators and installation. His crew were nice, quick and tidy! Well organized and detailed work! Thank you!"
Response time10 mins
Response rate88%
Recommended by90%of homeowners
Avatar for WyattWorks
WyattWorks
4.5(
60
)
Fixed Generator - InstallFixed Generator - RepairPortable Generator - Install+1 more

Serving Mount Holly, NC and surrounding areas

Approved (Corporate)

In business since 1979

Emergency services offered

Warranties offered

"Scott was on time and very professional. He examined the current installation of the toilets and provided me with options to address the problem and install new toilets. I enjoyed meeting him and appreciated his expert opinions. I am still getting estimates and will certainly keep this company at the top of my list. Scott is very easy to communicate with and will brighten your day with his smile."
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+1

Response time12 hrs
9 neighbors recently requested a quote
Recommended by90%of homeowners
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Generator Install questions, answered by experts

As a safety measure, you should always turn off the main breaker while operating your generator’s backup breaker. In addition, you should also switch off all appliance breakers so you don't have a power surge when the main breaker turns back on. And finally, turning off the main breaker prevents back-feeding, which endangers utility workers with the risk of electrocution. Back-feeding could also destroy the electrical circuits of your neighbors if they use the same power network.

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.

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.

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. 

Costs depend on generator type, labor, and additional wiring or transfer switch requirements.

The Mount Holly, NC homeowners’ guide to generator installs

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