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Verified Reviews for Generator Install pros in Joanna, SC

*The Angi rating for Generator Install companies in Joanna, 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 Joanna, 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 19, 2025

Find Generator install pros in Joanna

Avatar for Cagen Electric, LLC
Cagen Electric, LLC
4.7(
6
)
Fixed Generator - InstallPortable Generator - Install

Serving Joanna, 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 time7 hrs
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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
)
Fixed Generator - Install

Serving Joanna, 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 Knights Electrical Services
Knights Electrical Services
5.0(
1
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Joanna, SC and surrounding areas

In business since 2014

Free estimates

Emergency services offered

"Showed up on time and fixed issue fast. Will be sure to use them again if needed"
Panel Replacement, and power restored
Panel Replacement, and power restored
Panel Replacement, and power restored
Panel Replacement, and power restored
Recommended by100%of homeowners
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Clark Electric Service, Inc.
1.0(
1
)
Fixed Generator - InstallGenerator - Install - For BusinessGenerator - Repair - For Business+1 more

Serving Joanna, SC and surrounding areas

In business since 1996

Credit card accepted

We have the experience and commitment to provide quality workmanship and superior customer service on all our applications. We strive to maintain our reputation as a high quality, very service oriented company, with our main focus being customer satisfaction.

Response time5 days
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CD Service
New to Angi
Fixed Generator - RepairGenerator - Install - For BusinessGenerator - Repair - For Business+2 more

Serving Joanna, SC and surrounding areas

In business since 2007

Free estimates

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

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BNR Engineering
New to Angi
Generator - Repair - For Business

Serving Joanna, SC and surrounding areas

In business since 2018

Free estimates

Credit card accepted

BNR Engineering: Electrical Engineering. Energy and Construction Management Services\n\nPhone: 704.737.2336\nEmail: "[email protected]" or "[email protected]"\n\n ***Energy Audit of Buildings\nResidential - Residential tax credit \n Reduce Electric Bill\nCommercial - \n *** HELP WITH PERMITTING AND INSPECTIONS ***\nFourteen (14) years experience providing Design, Construction Administration and Permitting Services for:\n* PV/SOLAR Design/Build * Upgrade of Electrical Service * Interior Lighting & Power Renovations \n* Street & Site Lighting * Fire Alarm * Telecommunication * Churches * Schools * Design/Build * Commercial & Industrial Buildings, etc.\n\nExperience in providing engineering and construction management services include engagements with:\n Charlotte-Mecklenburg Schools(CMS) Mecklenburg County The City of Charlotte \n NO SET COST($$) OR FEE($$) NO PROJECT TO SMALL \n\n

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Generator Install questions, answered by experts

No, you should never plug a generator directly into a wall outlet in your house. This practice is extremely dangerous, often illegal, and can cause "back-feeding," where power from the generator flows back into utility lines, creating a life-threatening hazard for utility workers. It can also damage your home's electrical system, including appliances like pumps and HVAC fans. If the main power is restored while the generator is connected, it can destroy the generator and cause an electrical fire. To safely connect a generator, you must use a professionally installed transfer switch or an interlocking kit, which prevents back-feeding by disconnecting your home from the utility grid before the generator provides 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.

In most municipalities, you will need a permit to install a permanent home generator, including emergency backup, partial-home, and whole-home generators. A permit for a generator usually costs between $50 and $250, depending on where you live. Your electrician or certified generator installer will usually pull the permit for you—and might be required to do so by your building department—but you’ll be on the hook for the cost of the permit. You should ask your installer before agreeing to any work if they will pull the necessary permits for your project.

These advanced generators use a key fob or a smartphone app to remotely start, which is ideal for getting power back on immediately without venturing outside. This feature is more common on whole home generators, but you may be able to find it on large portable generators, too.

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. 

The Joanna, 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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