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Avatar for Mr. Electric of Gastonia
Mr. Electric of Gastonia
4.8(
62
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+2 more

Serving Dallas, NC and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Emergency services offered

"I want to take a minute and note that Carleton B. is incredible. Truly one of if not the best interactions I have had with a technician in any field and he is the sole reason we purchased a one year plan today. We are very pleased with his quality of work, communication, and timeliness. He has provided a great experience for us and for that we are very thankful."
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+89

3 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for ALB Electric L.L.C
ALB Electric L.L.C
5.0(
25
)
Portable Generator - Install

Serving Dallas, NC and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"LJ, with ALB was fantastic, personable, professional, communication about my project was great. The install went smoothly, inspection with the county was arranged by LJ and completed… I highly recommend ALB for any and all of your electrical installation and electrical projects! Definitely a 5 star ⭐️ ⭐️⭐️⭐️⭐️ review is warranted.."
Response time2 hrs
Response rate96%
68 neighbors recently requested a quote
Avatar for NuBlue Electric
NuBlue Electric
4.7(
12
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install

Serving Dallas, 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."
EV Charger Installation
Electrical Panel Upgrade and Installation
Electrical Fixture Installation Services
Generator Installation Services
EV Charger Installation

+80

Response time1 day
12 neighbors recently requested a quote
Recommended by66%of homeowners
J. N. Greene Electrical Contracting Inc.
5.0(
9
)
Generator - Install - For Business

Serving Dallas, NC and surrounding areas

Approved

In business since 1995

Free estimates

Credit card accepted

"If you need electrical work done, please call J. N. Green Electrical. We started off by calling several companies out to our house to fix what we thought was a minor electrical problem. After three different electricians came out and three different bills, with nothing fixed, we found J.N. Green Electrical on Angie List. We were skeptical at first but said, Let give it a try. Green Electrical was out at our house that same day and was able to fix the problem in no time. They were very professional and charged me less than the other three companies that did not fix the problem. I would definitely recommend them to anyone! They have been our go-to guys ever since!"
Response time6 hrs
Recommended by100%of homeowners
Avatar for WyattWorks
WyattWorks
4.5(
60
)
Fixed Generator - InstallFixed Generator - RepairPortable Generator - Install+1 more

Serving Dallas, 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
8 neighbors recently requested a quote
Recommended by90%of homeowners
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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.

Sizing a generator is a careful process that requires calculating the electrical load of your entire house. You have to take into account every device you want to use and their wattage requirements, plus the wattage needed to start them, and look for a generator that can safely run all that at around 80% capacity.

In more practical terms, a small home can run on a 10,000-watt generator (and if you only want to power a few key appliances, much less than that). A mid-sized home may need something between 15,000 and 22,000 watts. Larger homes require 25,000 watts or more. 

It is safe to run a generator continuously, but you must follow safety protocols to ensure personal and home safety. Read the manufacturer’s instructions for specific recommendations, but the general recommendation is to turn generators off overnight or when you’re away from the house. Overworked generators can pose a fire hazard and if your generator is not in a well-ventilated area, running it continuously could lead to carbon monoxide poisoning.

An undersized whole-house generator has the potential to overheat and shut down when you try to run a central AC system. This scenario can not only damage the whole-house generator, but can also trip your home’s breakers or cause electrical damage. To avoid this situation, hire a local generator installer to correctly size your whole-house generator.

DIY is possible for basic setups. Professional installation ensures safe and proper electrical connections.

The Dallas, NC homeowners’ guide to generator installs

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