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Never Lose Power Again

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.
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Licensed • Bonded • Insured

⭐⭐⭐⭐⭐ 5.0 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

100% Satisfaction Guarantee

We stand behind our work with a complete satisfaction guarantee

Licensed & Insured

Fully licensed, bonded, and insured for your protection

On-Time Service

We respect your time and arrive when scheduled

No Hidden Fees

Transparent pricing with no surprise charges

What Our Customers Say

Hear what they say about our services.

Excellent 5.0 | 12 reviews

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FAQ

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 (864-310-4554)
Available 24/7 for emergencies

Email

onecallsc@gmail.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

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