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Top-Rated Generator install pros in Greenville - Updated Nov 2026

Avatar for Quality Construction & Engineering
Quality Construction & Engineering
4.6(
32
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Greenville, MS and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"Quality Construction Engineering did an outstanding job installing the generator at my home! I truly appreciate their professionalism, quality workmanship, and attention to detail. Having backup power gives me and my family added peace of mind, and I’m so pleased with the installation. Thank you for a job well done! I highly recommend Quality Construction Engineering to anyone looking for quality generator installation."
Generac Generator
27 neighbors recently requested a quote
Avatar for J&J Son Construction, LLC
J&J Son Construction, LLC
4.3(
7
)
Fixed Generator - InstallPortable Generator - Install

Serving Greenville, MS and surrounding areas

Approved

In business since 2000

Free estimates

Credit card accepted

We take great pride in our extreme professionalism, timeliness and superior customer service on every job. We make sure to develop a lasting relationship so that the next time service is needed there will be no question on who to call. Satisfaction guaranteed! \n

Full Kitchen Remodel
Full Kitchen Remodel
Full Kitchen Remodel
1 neighbors recently requested a quote
Recommended by100%of homeowners
Kirby Morlino, Inc.
5.0(
2
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Greenville, MS and surrounding areas

In business since 1985

Free estimates

Offers commercial services

We offer over 35 years of experience 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.

Response time8 hrs
Recommended by100%of homeowners
Showing 1-10 of 19
Generator Install FAQs, answered by experts

Sizing a generator is a careful process that requires calculating the electrical load of your entire house. You have to take into account every device you want to use and their wattage requirements, plus the wattage needed to start them, and look for a generator that can safely run all that at around 80% capacity.

In more practical terms, a small home can run on a 10,000-watt generator (and if you only want to power a few key appliances, much less than that). A mid-sized home may need something between 15,000 and 22,000 watts. Larger homes require 25,000 watts or more. 

With proper maintenance, a whole-house generator can last between 20 and 40 years. The specific lifespan depends on how often and for how long the generator is used, and some models may have their life expectancy rated in hours of operation. To maximize its lifespan, expect to spend around $150 to $300 per year for annual maintenance checks from a qualified technician. During these checks, a technician will inspect the engine filter, starting mechanism, fuel, lubrication, and coolant levels. Consulting your installer and choosing a low-impact fuel like natural gas or diesel can also help ensure your generator lasts as long as possible.

Yes, natural gas generators can work without electricity. Natural gas generators are a common type of backup or whole-house generator that operates when the electrical grid isn’t working. The trick is using a transfer switch (which usually needs to be installed with the generator) that safely switches the home electrical system from the power grid to generator power when needed.

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. 

Costs depend on generator type, labor, and additional wiring or transfer switch requirements.

The Greenville, MS homeowners’ guide to generator installs

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