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Verified Reviews for Generator Install pros in Johnsonville, SC

*The Angi rating for Generator Install companies in Johnsonville, 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 Johnsonville, 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 June 05, 2026

Find Generator install pros in Johnsonville

Avatar for Mister Sparky of Florence
Mister Sparky of Florence
5.0(
16
)
Fixed Generator - InstallPortable Generator - InstallFixed Generator - Repair+4 more

Serving Johnsonville, SC and surrounding areas

Approved

Super Service Award Winner

In business since 2004

Free estimates

Emergency services offered

"Daniel, their electrician has helped us before. He arrived promptly and after discussing with us our issues went directly to work addressing our problem. He successfully completed his work to our satisfaction, discussed the repairs , and was on his way to his next appointment in a very timely manner. We are extremely satisfied with his work in particular and Mr Sparky in general in addressing our needs. Reliability and competence seem to be their hallmark."
Install - Under Cabinet Lighting
Install - Outdoor Outlets
Install - Outlet Replacements
Install - Outlet
Install - Door Bell

+5

14 neighbors recently requested a quote
Recommended by31%of homeowners
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Avatar for Smith Electrical And Telecommunication Services LLC
Smith Electrical And Telecommunication Services LLC
5.0(
4
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Repair - For Business+1 more

Serving Johnsonville, SC and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

"Got the job done quick, and for a good price!"
Smith Electrical
75 neighbors recently requested a quote
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Avatar for Swift Services Heating & Cooling, LLC
Swift Services Heating & Cooling, LLC
4.0(
64
)
Fixed Generator - InstallPortable Generator - RepairFixed Generator - Repair+1 more

Serving Johnsonville, SC and surrounding areas

Approved (Corporate)

In business since 1997

Free estimates

Emergency services offered

"Swift is an efficient and professional service company. They installed my new air conditioner quickly and with no problems. They were on time, and the installers were friendly and courteous. I would recommend them to everyone. I would not use anyone else for my AC service. They are the best!"
Response time10 hrs
47 neighbors recently requested a quote
Recommended by91%of homeowners
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Avatar for Rabon Brothers Services, LLC
Rabon Brothers Services, LLC
5.0(
3
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Johnsonville, SC and surrounding areas

In business since 2023

Free estimates

"Very professional, showed up on time, performed the generator service and was a pleasure to work with. You wonâ t go wrong hiring the Rabon Brothers!"
Response time4 days
Recommended by100%of homeowners
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Avatar for B1 Electric, LLC
B1 Electric, LLC
4.1(
30
)
Fixed Generator - Install

Serving Johnsonville, SC and surrounding areas

In business since 2016

Free estimates

Small jobs welcome

"Perfectionists, meticulous, cordial, and punctual!!!! Everything installed was done well. One of the installers even corrected electrical mistakes caused by our builder. Intend to hire them again for additional projects and will recommend to other residents in this community."
200A Service Upgrade
200A underground Service with disconnect
Kitchen lighting Project
Outdoor lighting and outdoor 100A electric service
Exterior Ceiling Fan with Leaf Design

+4

Response time4 hrs
Recommended by96%of homeowners
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Singleton Electric
5.0(
7
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Johnsonville, SC and surrounding areas

In business since 2019

Free estimates

Credit card accepted

"They were good company. They were really professional. They had a competitive price. They showed up when they said they're gonna be. They were very reliable. The owner was hardworking man and really conscientious. He goes above and beyond. He really cares about his work and his customers."
Recommended by100%of homeowners
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Showing 1-10 of 23
Generator Install questions, answered by experts

If your home already has a grinder pump and you’re still noticing issues (like frequently clogged toilets and sinks), it could be time to upgrade your grinder pump. Start by checking your existing horsepower. If there are four or fewer people living in your home, using a 1/2-horsepower grinder pump should be sufficient. Larger households should consider investing in a 1-horsepower grinder pump to maximize wastewater removal efforts.

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.

You can determine what size generator you need for a transfer switch by matching the switch to the largest outlet on your generator. Larger generators can power up to 10 circuits, while most 5,000-watt generators can provide power to six circuits. So, if your generator’s largest outlet is 30 amps, you’ll need a 30-amp transfer switch.

The cost to install a whole-house generator averages $5,200, with a typical price range of $1,500 to $8,900. However, total costs can vary from $400 for a small portable unit to over $18,000 for a large-capacity system. The most significant cost factor is the generator's size and capacity, but other variables include the brand, fuel type, and labor for assembly and installation.

Generator costs can be broken down by type:

  • Portable or Emergency Backup Generators (1kW–7.5kW): $500 to $2,000

  • Partial-Home Generators (9kW–20kW): $2,000 to $6,500

  • Whole-House Generators (22kW–48kW): $5,000 to $18,000

To avoid paying for more power than you need, consider hiring an electrician to calculate the electrical load for your essential appliances. It is also recommended to get at least three quotes to find the best deal for your specific needs and budget.

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.

The Johnsonville, 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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