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

Avatar for Powertex Electric
Powertex Electric
5.0(
10
)
Fixed Generator - InstallPortable Generator - Install

Serving Justin, TX and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"Everything went well, the technician thought everything out and had a plan and got things done. customer service, answered all my questions and also shared small conversation very professional. If I need more work, I will definitely use again."
Panel Before
Panel During Re-wire
Panel Rewire & Cleanup
Tesla Wall Charger
Free Estimates

+8

3 neighbors recently requested a quote
Avatar for LuminX Electrical Contractors
LuminX Electrical Contractors
4.9(
14
)
Portable Generator - InstallPortable Generator - Repair

Serving Justin, TX and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

"LuminX is a company I would recommend, they were extremely professional and courteous. I was informed when they were on their way and they did the job quickly and the new outlet was installed right where we needed it. I will definitely be calling them for future jobs and recommend to anyone needing electrical work."
Exterior Lighting
Exterior lighting
Before
Before
Interior

+10

Response time2 hrs
Response rate89%
Recommended by100%of homeowners
Avatar for S & G Electrical Services
S & G Electrical Services
5.0(
14
)
Portable Generator - Install

Serving Justin, TX and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Emergency services offered

Warranties offered

"Casey & Allen are hands-down the BEST electricians I’ve ever worked with. They came to fix my doorbell transformer, realized it was simple fix, and since they don’t charge hourly, instead they charge by Task Price, I paid almost half of what other companies had quoted. Who does that anymore?! And here’s the most impressive part. My simple fix ended up being a bit of work… The new transformer that I bought off of Amazon turned out to be broken so they waited while I ran to Home Depot to grab another one—no pressure to buy theirs. They double-checked the voltage to protect my ADT camera (apparently people fry these all the time!) and made sure everything was perfect before leaving. And charged the original agreement. $69. Professional. Honest. Kind. Fast. Affordable. I chose them because of their reviews—now I’m leaving one because they earned it. If you need any electrical work done, don’t think twice—go with S&G Electrical."
Completed Jobs
Completed Jobs
Completed Jobs
Completed Jobs
Completed Jobs

+2

Response time3 hrs
Response rate98%
4 neighbors recently requested a quote
Avatar for Tri-State Water, Power & Air
Tri-State Water, Power & Air
3.9(
7
)
Fixed Generator - InstallGenerator - InstallGenerator - Install - For Business

Serving Justin, TX and surrounding areas

Approved (Corporate)

In business since 1992

Free estimates

Emergency services offered

Tri-State Water, Power & Air has been provided products designed to improve the comfort and quality of life of our customers since 1992. Our specialty is Automatic Home Standby Generators. \nWe expect customer service excellence and aim to go above and beyond on every call. With 10 locations across 8 states, Tri-State is always ready to serve you.

Additional Photos
109 neighbors recently requested a quote
Avatar for Cooper Electrical Contractors, LLC
Cooper Electrical Contractors, LLC
5.0(
2
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Justin, TX and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"Ben worked on getting my house up to code, which included a service panel move/upgrade mainly plus all the things the inspector wanted. He made sure the work met the inspector expectations and was clear and concise on the scope of work, and costs. His communication, punctuality and attention to detail was top notch. Highly recommend."
Response time7 hrs
Response rate97%
Recommended by50%of homeowners
Avatar for R&D Electrical, LLC
R&D Electrical, LLC
4.5(
2
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Justin, TX and surrounding areas

Approved

In business since 2015

Free estimates

Warranties offered

"We had a less than ideal work environment but the electrician took care of our concern in a minimum amount of time, and was courteous and professional in spite of a misunderstanding over the time we thought he would arrive."
Base of the tower
Service with Generator
Lighting for water fountain
Pendant lighting
Walkway lighting

+2

Response time1 day
Response rate96%
Recommended by100%of homeowners
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Generator Install FAQs, answered by experts

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.

Carbon monoxide emissions aren’t only dangerous to human life, but they also harm our planet. While natural gas generators emit lower levels of CO than other fuel sources, there are still ways to reduce emission levels. For example, shop around for an eco-friendly generator that complies with current emission standards. Also, make sure your generator is serviced regularly to avoid CO buildup. 

Generators are usually sized by running watts and starting watts. Ideally, you’ll want a generator that can offer both the necessary running watts and starting watts for everything you need to power without going beyond 90% of its capacity. Calculate your home’s electrical load based on the breakers in your home or adding up the appliance and lighting needs of connected rooms.

A home that is 2,500 square feet will likely need a 20kW to 25kW generator. Consult your local generator installer to confirm the generator size needed to power your home before purchasing a new one. Be sure to consider how much power your necessary devices need to run.

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

The Justin, TX homeowners’ guide to generator installs

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