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Verified Reviews for Generator Install pros in Hazelwood, MO

*The Angi rating for Generator Install companies in Hazelwood, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.

*The HomeAdvisor rating for Generator Install companies in Hazelwood, MO is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.

Last update on July 29, 2026

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

Avatar for Wells Electric LLC
Wells Electric LLC
5.0(
5
)
Fixed Generator - InstallFixed Generator - Repair

Serving Hazelwood, MO and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

With over 20 years of experience, we’re a licensed, family-owned electrician proudly serving Warrenton and the surrounding areas—including St. Louis, St. Charles, Warren, and Franklin Counties. From expert electrical repairs to new home build wiring and generator installation, we bring dependable service, quality craftsmanship, and peace of mind to every job. Fully licensed in the state of Missouri and St. Charles County, we’re here to power your home or business with skill and care you can trust.

Response time2 days
Response rate100%
8 neighbors recently requested a quote
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Avatar for Fidelis Renewables
Fidelis Renewables
5.0(
9
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Hazelwood, MO and surrounding areas

Approved

In business since 2015

Free estimates

Emergency services offered

Fidelis Renewables is a veteran-owned solar and electrical contractor serving residential and commercial customers across the Kansas City and St. Louis regions. We specialize in new solar installations, solar service and repair, battery storage, electrical upgrades, EV chargers, and professional solar removal and reinstallation for roof replacement and insurance claims. \n\nWe also help homeowners with orphaned or abandoned solar systems when the original installer is no longer available. Our in-house team is led by a licensed Master Electrician, and we service systems from multiple manufacturers. Fidelis Protect Membership offers ongoing monitoring, warranty coordination, annual inspections, and priority service. \n\nIntegrity First – Energy Experts.

Electrical Meters
Solar Shot
Backup Batteries
51 neighbors recently requested a quote
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Avatar for Power Up Electrical Contractors, LLC
Power Up Electrical Contractors, LLC
4.5(
19
)
Fixed Generator - InstallPortable Generator - InstallGenerator - Install+1 more

Serving Hazelwood, MO and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Emergency services offered

"Hired “Power Up” to refit our electrical panel and install an outside connecting plug to run a new portable electric generator. Jeff came out and spent time to evaluate and discuss our needs. He was consultative throughout the whole process. Lisa was responsible for arranging installation and paperwork and was very responsive to inquiries as well as reaching out to confirm things were moving forward. Justin was our installer and he knew his stuff. Very friendly and completed the work on time and as expected. Great experience working with “Power Up.”"
25 neighbors recently requested a quote
Recommended by82%of homeowners
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Avatar for Hoffmann Brothers
Hoffmann Brothers
3.8(
32
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Hazelwood, MO and surrounding areas

Approved

In business since 1980

Emergency services offered

Warranties offered

"Best service I have ever received from a company and the employee who did the installation"
Burnt out panel
Burnt electrical panel
Panel replacement
Electrical Panel
Replacement Electrial panel with labeling

+14

Response time10 hrs
Recommended by87%of homeowners
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Avatar for FixPro
FixPro
5.0(
5
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Hazelwood, MO and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

FixPro is a locally owned and operated handyman service proudly serving St. Louis, St. Charles, Lincoln, Warren, Franklin, and Jefferson Counties. We specialize in high-quality home repairs, carpentry, drywall, painting, flooring, deck repair, and general maintenance—handling everything from small fixes to larger improvement projects with precision and professionalism.\n\nWith years of hands-on experience across construction, maintenance, and service industries, I built FixPro to deliver what most contractors don’t: clear communication, reliable scheduling, and work done right the first time. We show up when we say we will, diagnose issues properly, and provide straightforward solutions without cutting corners.\n\nOur approach is simple—treat every home like it’s our own. We focus on clean workmanship, long-term durability, and customer satisfaction. If you want it done right the first time, FixPro is ready.\n\nNeed Something Fixed? Hire a Pro.

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Avatar for Hoffmann Brothers
Hoffmann Brothers
3.7(
42
)
Fixed Generator - InstallFixed Generator - Repair

Serving Hazelwood, MO and surrounding areas

Approved

In business since 2000

Emergency services offered

Warranties offered

Hoffmann Brothers is the leading home services provider in the St. Louis area, proudly serving homeowners in the St. Louis metro for over 40 years.

Drain and Water Treatment
Garbage Disposal
Sump Pump
Water Treatment
Sewer and Pipe Drainage

+1

Recommended by93%of homeowners
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Showing 1-10 of 47
Generator Install FAQs, answered by experts

While standby generators provide essential backup power, they can fail when you need them most due to lack of maintenance, fuel supply issues, dead batteries, electrical problems, or improper installation. To avoid costly failures, professional installation and regular maintenance are crucial. Licensed technicians ensure safety, uphold warranty requirements, comply with regulations, and provide expert servicing.

The amount of time a standby generator can run continuously is around 3,000 hours on average. However, standby generators can generally run indefinitely as long as they have a continuous fuel supply. Generators hooked up to a home’s natural gas supply are the best option for extended usage, as these won’t rely on a finite fuel supply based on how much you have in storage. Generators running on liquid propane or diesel won’t last as long, as these require fuel storage and regular refueling to stay running.

Generators run on a variety of fuel types, ranging from natural gas to solar power. Keep in mind that fuel costs varying by type:

  • Natural gas: $2,000–$21,000 per year 

  • Liquid propane: $2,000–$21,000 per year

  • Diesel: $3,000–$20,000 per year

  • Gasoline: $500–$3,000 per year

  • Solar generator: $2,000–$25,000 per unit

  • Battery backup: $10,000–$25,000 per unit

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.

The average cost to install a home generator is $5,200, but total costs can range from $500 to $18,000 or more. The final price depends on several factors, including the generator's size, type, brand, fuel source, and the cost of labor and assembly. The generator's size is the most significant cost factor, as units that can power larger homes with higher energy demands cost more.

Cost breakdowns by generator type are typically as follows:

  • Portable or Emergency Backup Generators (1kW–7.5kW): $500–$2,000

  • Partial-Home Generators (9kW–20kW): $2,000–$6,500

  • Whole-House Generators (22kW–48kW): $5,000–$18,000

To ensure you get the right size unit for your needs without overpaying, consider hiring an electrician to calculate the electrical load of your essential appliances. It is also recommended to get at least three quotes from qualified installers to find the best fit for your budget.

The Hazelwood, MO homeowners’ guide to generator installs

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

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