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Verified Reviews for Generator Install pros in Johnston, SC

*The Angi rating for Generator Install companies in Johnston, SC 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 Johnston, SC 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 September 19, 2024

Find Generator install pros in Johnston

Avatar for B & Z Electrical Service
B & Z Electrical Service
5.0(
8
)

Serving Johnston, SC and surrounding areas

Approved

In business since 1994

Free estimates

Small jobs welcome

"B and Z electrical responded to my house to install a receptacle. The electrician was professional, showed up on time, completed the job promptly, and left a clean work area. I highly recommend B and Z electrical and will use them again for any of my electrical needs."
I can work on anythng!
Response time10 hrs
Response rate100%
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Avatar for Electrical Service Precision LLC
Electrical Service Precision LLC
5.0(
7
)

Serving Johnston, SC and surrounding areas

In business since 2005

Free estimates

"Angel and crew worked on my current meter on short notice. They made sure my overhead power supply was in good shape and gave me a free estimate before doing the job. Very professional team!"
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+135

Recommended by100%of homeowners
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Avatar for Cagen Electric, LLC
Cagen Electric, LLC
4.7(
6
)

Serving Johnston, SC and surrounding areas

In business since 2025

Free estimates

Credit card accepted

"Spencer Cagen is very professional and honest. He finished my project which could cost more than $1600 from another company for a little over $200. I strongly recommend his service and will hire him again for home project next time."
Response time6 hrs
3 neighbors recently requested a quote
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Avatar for THE LEGACY ELECTRIC SERVICES OF THE UPSTATE INC
THE LEGACY ELECTRIC SERVICES OF THE UPSTATE INC
5.0(
2
)

Serving Johnston, SC and surrounding areas

In business since 2024

Free estimates

Credit card accepted

We offer over 30 years of experience in the electrical industry. We take on a wide range of electrical projects to include full installation for additions and remodels as well as wiring and panel upgrades and a variety of other jobs. We're committed to providing a personalized service for each individual project we take on & look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

My jobs
My jobs
My jobs
My jobs
My jobs

+7

Response time10 mins
Response rate100%
Recommended by100%of homeowners
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Avatar for The Home Depot - Generators
The Home Depot - Generators
2.5(
1
)

Serving Johnston, SC and surrounding areas

In business since 2003

Free estimates

Small jobs welcome

Today, we're proud to be the world's largest home improvement retailer. In 2,300 stores across North America, we aspire to excel in service – to our customers, associates, communities and shareholders. That's what leadership means to us. That's The Home Depot difference.

Generators
Generators
Generators
Generator
Generators

+5

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Avatar for Canter Power Systems, LLC
Canter Power Systems, LLC
1.3(
18
)

Serving Johnston, SC and surrounding areas

In business since 1948

Free estimates

Warranties offered

"It's a family owned business that is fanatically focused on outrageous customer service at every step of the purchase and installation process."
1
Response time2 days
Response rate85%
Recommended by50%of homeowners
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Fincher Electric Construction LLC
1.0(
1
)

Serving Johnston, SC and surrounding areas

In business since 1996

Free estimates

Credit card accepted

We offer over 24 years of experience the electrical industry. We take on a wide range of electrical projects to include full installation for additions and remodels as well as wiring and panel upgrades and a variety of other jobs. We're committed to providing a personalized service for each individual project we take on & look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

Response time2 hrs
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E E, LLC
New to Angi

Serving Johnston, SC and surrounding areas

In business since 2015

Free estimates

Credit card accepted

With over 17 years of experience in electrical, Ee LLC is your one stop electric shop. From new electrical for home additions to panel upgrades Ee LLC has got you covered. Licensed through the international code council for residential, commercial and industrial; we take pride in our high quality craftsmanship, attention to detail and excellent customer care. For quality that you can rely on; call Ee LLC today and get your project done the right way!!\n\n.

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Generator Install questions, answered by experts

If you’re wondering if you can use your electric vehicle as a backup battery, it depends on whether your EV is compatible with bidirectional charging. This technology allows energy to flow both ways, enabling vehicle-to-home (V2H) backup power, vehicle-to-load (V2L) for appliances and camping, and vehicle-to-grid (V2G) to support the power grid. Compatible EVs convert stored DC energy into usable AC power, helping reduce energy costs and enhance grid stability while providing emergency backup power.

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.

While diesel is relatively stable, it won’t last nearly as long as propane and you may have to replace it if it sits unused for too long. Diesel can sometimes struggle to work efficiently or start engines during especially cold weather, so it’s not the best choice for every climate. Compared to fuels like propane and natural gas, diesel generators tend to be noisier and create more exhaust, which isn’t always ideal for home use.

To power a central air system during a power outage, the whole-house generator will need to be at least 5,000 watts, and this number will significantly increase for larger units. Check the specific wattage requirements of your AC unit to choose the right generator size. Consider consulting a generator installer to ensure your whole-house generator meets your electrical load needs.

With proper maintenance, a whole-house generator can last between 20 and 40 years. The specific lifespan depends on how often and for how long the generator is used, and some models may have their life expectancy rated in hours of operation. To maximize its lifespan, expect to spend around $150 to $300 per year for annual maintenance checks from a qualified technician. During these checks, a technician will inspect the engine filter, starting mechanism, fuel, lubrication, and coolant levels. Consulting your installer and choosing a low-impact fuel like natural gas or diesel can also help ensure your generator lasts as long as possible.

The Johnston, SC homeowners’ guide to generator installs

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

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