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Avatar for Charleston Electric
Charleston Electric
4.7(
359
)

Serving Saint Stephen, SC and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Not good, tech said the generator was out of code due to location, did not perform services. He told me office would be in touch they scheduled a quote bid for 9/23/2020 many weeks after tech was here, so after bid it will be one to two weeks before relocation of generator and service. Process is taking way to long I was willing to advance pay if they brought materials on 9/23 and complete proper install. It’s Hurricane season. They also billed me for the maintenance which he could not do because he said it was out of. Code."
20kw Cummins Onan Generator
Electrical Panel Upgrade
Bathroom remodel
20 KW Cummins Onan Generator
12 neighbors recently requested a quote
Recommended by91%of homeowners
Wadford Water Works, LLC
4.9(
8
)

Serving Saint Stephen, SC and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"Mr. Wadford was and is very responsive to any query or request. He was always on time as was the installer. He was very patient and thorough in explaining the system operation and Bluetooth software. He insured that I understood everything and answered any and all questions. I have only had the system for a short time but it is performing perfectly. This project is to replace n old system. This new system cost $1500 less than the 20 year old system it replaced. The Wadford Water Works provides a quality system as well as quick, efficient and professional installation. I am thoroughly pleased with my decision with my choice to do business with Mr. Wadford."
Response time2 hrs
2 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for J and Jelectric
J and Jelectric
5.0(
11
)

Serving Saint Stephen, SC and surrounding areas

In business since 2007

Emergency services offered

"The company does great work. I am please with the work. They worked fast and were very friendly. They will be installing more lights for me in the near future. The lights that I bought for him to install in the kitchen doesn’t light up the kitchen enough, so since I liked the design of light so much the owner suggested that i place the same exact light in another area of the kitchen. Great idea. He was hundreds dollars cheaper than other quotes that I received. They do wonderful work. I have already recommended him to my sister that needs electrical work."
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+15

Recommended by100%of homeowners
Kirby Electric Services
5.0(
5
)

Serving Saint Stephen, SC and surrounding areas

In business since 1980

Emergency services offered

Credit card accepted

"I can not say enough good things about Mr. Kirby and his company. He was very thorough, efficient and professional. I recently hired him to wire my new barn for lights and power as well as some improvements to my new home. We discussed my wishes prior to starting and his knowledge was pivotal in guiding me through the planning and supply process. He knew and adhered to all the electrical codes and he knew his business and trade. He worked very hard and was there every day until the project was complete. He even found some issues regarding previous work I'd had done and helped me resolve those in addition to the project I hired him for. I highly recommend him for ANY electrical project or problem you may have. I will always call him first for any of my future electrical needs."
Response time3 hrs
Response rate85%
Recommended by100%of homeowners
Avatar for Generator Supercenter of Charleston
Generator Supercenter of Charleston
1.8(
3
)

Serving Saint Stephen, SC and surrounding areas

In business since 2010

Free estimates

Warranties offered

Generator Supercenter is your area leader for all of your fixed generator needs. We know that customer service is key to a job well done, and ours is the best around. When you want top quality work at an always fair price, call the professionals at Generator Supercenter.

Generac 22kW
Mobile Link™
Generac 26kW
Generac 24kW
Generac 26kW

+1

Response time3 days
Recommended by33%of homeowners
Avatar for Rebuilders
Rebuilders
4.5(
2
)

Serving Saint Stephen, SC and surrounding areas

In business since 1993

Emergency services offered

Credit card accepted

Rebuilders specializes in emergency commercial restoration across the Mid-Atlantic servicing West Virginia, Pennsylvania, Ohio, and Maryland, ensuring minimal downtime so you can get back to business as quickly as possible.

Mountaineer Field-house
Mountaineer Field-house
After restoration of this charming bungalow!
Mountaineer Field-house
Mountaineer Field-house

+13

Recommended by100%of homeowners
Showing 1-10 of 16
Generator Install questions, answered by experts

A 10,000-watt generator can run a small to mid-sized central AC unit (typically up to 3 tons or 36,000 BTU) along with a few other appliances. However, larger AC units or additional loads will require a bigger generator. Consult a local generator installer to ensure you add the correct size generator to your home.

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.

To reduce AC startup power for a whole-house generator, install a soft start kit or hard start capacitor, which lowers the initial surge by gradually ramping up the compressor. Using a smart load manager can also help by staggering startup loads, preventing a system overload and future costly repairs.

Natural gas and electricity rates vary significantly based on location, and pricing can change over time, too. It’s possible that in locations where natural gas is particularly inexpensive, it will cost less than grid-based electricity will. However, you should also factor in the generator’s initial costs and maintenance needs, as well as its noise level and if it can comfortably power all your home appliances.

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.

The Saint Stephen, SC homeowners’ guide to generator installs

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