Home Generator Installation in Greenville & Spartanburg

Keep your home powered during outages with a professionally installed standby generator. Automatic backup power for comfort, safety, and peace of mind.

Licensed • Bonded • Insured

⭐⭐⭐⭐⭐ 4.9/5 Rating

Same-Day Service Available

Power Outage Problems We Solve

Frequent power outages disrupting home and work
Risk of food spoilage and medication loss
Medical equipment requiring uninterrupted power
Home office requiring reliable electricity
Sump pump failure causing flooding during storms
Security systems going offline during outages

Our Solution

Whole-home standby generator installation
Automatic transfer switch installation
Generator sizing and load calculation
Natural gas or propane connection
Maintenance plans for reliable operation
Portable generator hookup solutions

Our Generator Installation Process

Our simple, straightforward process

1

Assessment

Calculate power needs

2

Selection

Choose right generator size

3

Installation

Professional setup and wiring

4

Testing

Verify automatic operation

Why Choose One Call Services?

Professional service you can trust

Protected Homeowners

“Installed 22kW Generac generator. During last storm, power switched over automatically in 10 seconds. Didn’t lose anything in freezer. Best investment we’ve made!”

Patricia Adams

4 days ago

“Professional installation from start to finish. Handled permits, concrete pad, gas line, everything. Generator has kicked on twice so far – works flawlessly!”

William Scott

2 weeks ago

“Work from home and needed reliable power. Whole-home generator gives peace of mind. Installation was clean, crew was professional. Very happy!”

Karen Rodriguez

3 weeks ago

Frequently Asked Questions

Got questions? We’ve got answers

What size generator do I need for my home?

It depends on what you want to power. Whole-home generators range from 12kW to 48kW. We perform a load calculation considering essentials (HVAC, refrigerator, lights) vs luxury items to recommend the right size.

How long does generator installation take?

Most residential installations take 1-2 days. This includes electrical work, gas line connection (if needed), concrete pad installation, and final testing. Permits may add a few days to timeline.

Natural gas or propane - which is better?

Natural gas is convenient if available – unlimited supply during outages. Propane requires tank refills but works anywhere. We’ll help choose based on your location, fuel availability, and preferences.

How does an automatic transfer switch work?

When power goes out, the transfer switch detects it within seconds, starts your generator, and transfers power automatically. When utility power returns, it switches back and shuts down the generator. No action needed from you!

Do generators require maintenance?

Yes, like any engine, generators need regular maintenance. We recommend annual professional servicing (oil change, filter replacement, battery check). Most generators self-test weekly to ensure readiness.

Can I run my whole house on a generator?

With a properly-sized whole-home generator, yes! We’ll ensure your generator can handle your home’s electrical load, including HVAC, appliances, and electronics. You won’t notice the difference during an outage.

Contact Information

Phone

864-ONE-CALL (864-663-2255)
Available 24/7 for emergencies

Email

service@onecallelectric.com
We'll respond within 24 hours

Service Area

Greenville, SC Spartanburg, SC & Surrounding Areas

Business Hours

Monday - Friday: 7:00 AM - 6:00 PM
Saturday: 8:00 AM - 4:00 PM
Sunday: Emergency Service Only
24/7 Emergency Service Available

🎉 Special Offer: Mention this form for 10% off your first service!

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