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Avatar for U.S. Energy Solutions
U.S. Energy Solutions
4.7(
74
)
Fixed Generator - InstallPortable Generator - InstallFixed Generator - Repair+4 more

Serving Mayo, SC and surrounding areas

Approved

In business since 2015

Warranties offered

Credit card accepted

"These guys did a great job! I was called within 1 minute of requesting quotes for this job. I was given a reasonable quote promptly. Within a few days the unit was installed and is working wonderfully. I have to point out the technician that did the install. Josh was courteous and professional at all times. He stayed in contact with me thru the whole process. I would absolutely recommend this company and will to any of my neighbors that have such needs."
Horan Solar and Battery -Easley SC
Horan Solar and Battery -Easley SC
Horan Solar and Battery -Easley SC
Horan Solar and Battery -Easley SC
Horan Roof Installation 3rd day

+1

13 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for US Energy Solutions, LLC
US Energy Solutions, LLC
4.8(
146
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Mayo, SC and surrounding areas

Approved

In business since 2015

Free estimates

Credit card accepted

"Whole house Generator installation was neat and clean and the electricians, Forest and Kevin were personable, professional and did such a great job! Richard did a wonderful job communicating with us. Great Company! We highly recommend them!"
Roof Mounted Solar System
Solar Battery Energy Storage
Solar Battery Energy Storage
Heat Pump
Air Conditioning Unit

+6

Response time10 hrs
Response rate92%
5 neighbors recently requested a quote
Current Electric LLC
5.0(
10
)
Portable Generator - Install

Serving Mayo, SC and surrounding areas

Approved

In business since 2016

Free estimates

Offers commercial services

"We wanted to update our dated kitchen, and needed to upgrade multiple aspects of the electrical. We called Current Electric on recommendation from a friend who had used their services in the past. Through the entire process of replacing the old lighting with more modern fixtures, installing an outlet in the pantry for our toaster oven to free up counter space, and adding a switch under the sink for the new garbage disposal we had plumbers install beforehand, these contractors were friendly, professional and knowledgable. They worked in a timely manner that allowed us to stress less about the project and enjoy the new look and function of our updated kitchen. Everything works just how we had hoped and we intend to use their services for any future electrical work."
Response time8 hrs
2 neighbors recently requested a quote
Recommended by70%of homeowners
Avatar for VoltX Electrical
VoltX Electrical
5.0(
6
)
Fixed Generator - InstallPortable Generator - Install

Serving Mayo, SC and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Offers commercial services

"VoltX is the premier electrical service provider in our area. I have worked with Andrew of VoltX for some time now and the work they do is nothing short of exceptional. From wiring my outdoor area at my home, to my business, to my complete home generator, each time has been a pleasure and I will continue to use their services in the future, as I have dozens of times in the past! If you re looking for electrical.. Call these guys!"
Mid install
Response time2 days
2 neighbors recently requested a quote
Avatar for Geter Electrical Services
Geter Electrical Services
5.0(
4
)
Fixed Generator - Install

Serving Mayo, SC and surrounding areas

Approved

In business since 2020

Free estimates

Small jobs welcome

"My initial inquiry was quickly responded to by the business owner. We discussed the problem, and he provided good advice. Based on that I hired him and scheduled the visit. Everything went smoothly and the work was completed to my satisfaction. I would hire DJ Geter again and refer him to anyone who asks me who my electrician is."
Response time1 day
Response rate91%
5 neighbors recently requested a quote
Avatar for Old Timey Electric, LLC
Old Timey Electric, LLC
New to Angi
Portable Generator - Install

Serving Mayo, SC and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

Old Timey Electric is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. We look forward to working with you!

Projects
40 neighbors recently requested a quote
Avatar for Corley Plumbing Air Electric Inc
Corley Plumbing Air Electric Inc
4.0(
453
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Mayo, SC and surrounding areas

In business since 1986

Emergency services offered

"SUMMARY: HIGH QUALITY WORK WITH LARGE PRICETAG. Corley plumber arrived on time. Their plumber was polite and offered several options for the repair. The repair was completed correctly and in a timely manner. Work area was cleaned after plumbing work was completed. No problems with the repair since it was completed which was several years ago. In short, I would give them FIVE STARS FOR THE QUALITY OF THEIR WORK. I would hire them again in an EMERGENCY (which is why I hired them for this work; the usual plumbers I use were unavailable), but NOT for non-emergency work. My reason for not wanting to use them for routine work is that their prices were OUTRAGEOUS and I'm not a miser (this is why I removed one star in my rating). The few replacement parts needed would have been nominal cost at a plumbing supply store. That means their labor was $200+/hr for installing compression fit connections which is even easier and quicker than gluing PVC pipes together (no heavy lifting; nothing complicated; easy access to pipes). I've had other plumbing jobs that were too big for me to do. I've found competent plumbers that do a great job (quality like Corley's) for half the price if you are willing to wait a day or two. Lesson: Instant gratification has a high price tag. FYI: They will charge for the cost estimate if you don't have them do the repair."
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+5

Recommended by77%of homeowners
Showing 1-10 of 36
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.

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.

Whole-house generators can run continuously for extended periods, even for weeks at a time (around 400 to 500 hours), as long as they have a sufficient fuel supply. However, this type of extensive use will increase wear and tear and can shorten the generator's overall lifespan. During long periods of operation, it's important to check and refill the engine oil as needed, potentially as frequently as daily depending on the model. If your generator uses a fuel tank, ensure it is kept full to prevent unexpected shutdowns.

Generally, you’ll want to keep between 60 and 70 feet between the generator and the transfer switch. There are a few reasons for this, including:

  • The distance reduces the noise coming from the generator into your home.

  • It increases efficiency because you won’t have a voltage drop from this short of a distance.

  • Prevents carbon monoxide poisoning: keep at least 15 feet between your generator and an open window. 

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 Mayo, SC homeowners’ guide to generator installs

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