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Standby Generator Service & Repair

Keep your generator ready for the next outage. Our certified technicians provide scheduled maintenance, diagnostics, and repairs for Generac and other major brands—covering oil & filter changes, battery and firmware checks, fuel system inspection, and full system load testing. Serving Greenville and the Upstate.

What’s Included in a Professional Tune-Up

  • Oil & filter replacement, spark plug inspection
  • Battery test & charger verification
  • Controller diagnostics & firmware updates
  • Fuel system & regulator checks (LP/NG)
  • Air filter, belts & enclosure inspection
  • Exercise test & simulated load test
  • ATS operation & voltage/frequency checks
  • Written health report & recommendations
Experiencing alarms, failure to start, or rough running? We handle emergency diagnostics and repairs for ignition problems, fuel delivery issues, controller faults, sensor failures, and ATS communication errors.
Installed standby generator at customer site Technician performing generator maintenance
How does home standby generator installation work?

A typical installation includes: a virtual assessment call with load calculation, an estimate, a pre-site visit, permitting, pad prep, fuel connection, ATS wiring, commissioning, and final inspection.

What is a home standby generator?

A standby generator is a permanently installed unit that automatically powers your home during outages. It’s wired into your panel with an Automatic Transfer Switch (ATS).

Why should I buy a home standby generator instead of a portable generator?

Standby generators are safer, automatic, and power your whole home without the hassle of refueling or running cords. They’re fully code-compliant and permanent solutions.

What is an automatic backup generator?

An automatic generator detects outages and switches on within seconds, keeping essential circuits or your entire home powered without manual intervention.

How does an automatic generator know when to turn on?

The system constantly monitors utility power. When it senses a failure, it automatically starts and transfers your home to generator power via the ATS.

What types of fuel do automatic generators use?

Most standby units run on natural gas or liquid propane (LP). Fuel type depends on your home’s access and preference, but both are safe and reliable options.

Can a generator power my whole home?

Yes — with the right sizing. We perform load calculations to determine whether you need full-house coverage or just essential circuits like HVAC, refrigeration, and lighting.

How often should a generator be maintained?

We recommend at least an annual service. This includes oil/filter changes, battery checks, and load testing. We offer annual and bi-annual maintenance plans.

Will an automatic generator add value to my property?

Yes. Standby systems are attractive to buyers, increase home resilience, and often improve property value — especially in areas with frequent outages.

How do I correctly size a generator for my home?

We perform a load calculation during your free virtual assessment call to determine the right size based on your appliances, HVAC, and critical circuits. Proper sizing ensures efficiency and reliability.

Why Your Neighbors Choose Generac Generators

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Dom Crotty
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Don and the rest of the crew did an excellent job upgrading our house HVAC systems. Don spent hours dialing in our project. His quotes were extremely thorough and fit our budget. Steve performed the technical walk-through and the actual removal and new install, with Ivan. These guys worked their behinds off on two of the hottest days this Summer in the attic of our house--without a complaint or hesitation. Impressive! Impressive too that the job they did was excellent. We're really happy with our new variable speed system--it has been keeping us comfortable since it came online. Thanks to all the folks at U.S. Energy Solutions. We'd recommend them highly to anyone for their integrity, competency and true commitment to excellence in their work.
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ken downs profile picture
ken downs
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The did a great job in the set up, the three guys work very well together,great job guys.
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Bryan Metts
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Ivan Gretchen and Steven Salazar did a great job installing my mom’s hv/ac unit and heat pump hot water heater. They both were very professional and very knowledgeable on the products they were installing sticking around to make sure my mom and I understood this new technology “new to us”. They left no mess and cleaned up all the old equipment that came out of the house.
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David profile picture
David
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They got my system up and running quickly. Very courteous and helpful
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Clark Bell profile picture
Clark Bell
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Once the permit cleared it was done in two days. Required hand digging a 50 ft trench. Good guys to get work done.
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Sandra Hamm profile picture
Sandra Hamm
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Our technician was JC and he was professional, and very knowledgeable. Our Generac generator had nothing on the screen and it ended up that we needed a new battery( after 6 years). He also reconnected us to our WiFi which we also lost. He got it up and running, did all the regular maintenance, oil change, filters , etc and we are now good to go. We will never use another company. US Energy Solutions are the very best!!
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Jenny Swearingen
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Call these guys for all of your hvac and electrical services. They are professional, proficient and have the knowledge to get the job done! From the office staff to the installers, everyone is great to work with and a refreshing sense of pride in the work that they do. I highly recommend them!
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Kn C profile picture
Kn C
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Could not have been happier with US Energy Solutions.Very reliable and great price. Best all around