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Best generator install pros near Schertz, TX

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

Avatar for Thundercolt Electric
Thundercolt Electric
5.0(
124
)
Portable Generator - Install

Serving Schertz, TX and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Emergency services offered

"Work was well done, and they thought about how to best install the outlets to serve the needed purpose. Installation was quick and professional, they also cleaned up after themselves. I will use Thundercolt Electric for future electrical needs."
Side View #3
Rear View #1
Side View #2
Side View #1
Hallway

+208

Response time1 day
10 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for JAMES GRIFFIN ELECTRIC LLC
JAMES GRIFFIN ELECTRIC LLC
5.0(
17
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Schertz, TX and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"I had finally broke down and bought a generator. When I called one of the big guys they said they would show up at a certain time. Lets just say they did not. When I called to their office all I got was the run around. I was referred to James Griffin Electric by a friend and when I called I was surprised the owner actually answered. He was able to get out there very promptly and got me going. I will definitely be using him again and referring him in the future."
2023
2023
2023
2023
2023

+18

Response time5 hrs
Recommended by82%of homeowners
Keil Electric LLC
5.0(
14
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Schertz, TX and surrounding areas

Approved

In business since 2014

Credit card accepted

Offers commercial services

"Xavier diagnosed the situation and determined the trouble was the outdated main disconnect had a broken contact. He coordinated with CPS, the electricity supplier, and the company?s installer to remedy the problem quickly. He took time with me to explain everything and gave me a price quote in advance. He had been recommended to me by an elder in my church who had used him and said their price quote was a thousand dollars less than the other quote he got. Xavier is a great guy and now I consider him one of my friends. He is a honest old school electrician that believes in treating the customers with concern and care. I very seldom give reviews but this time I will rate their service as excellent."
3 neighbors recently requested a quote
Recommended by53%of homeowners
Avatar for Beyer Electrical
Beyer Electrical
4.6(
24
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Schertz, TX and surrounding areas

Approved

In business since 1998

Credit card accepted

Offers commercial services

Need an electrician in South Texas? Beyer Electrical helps homeowners and businesses solve the electrical issues that matter most, from frequently tripping breakers, outdated panels and faulty wiring to lighting upgrades, generator installation and EV charger setup. Whether you need a quick repair, a safety inspection or electrical work for a remodel or new construction project, our licensed team is here to keep your property safe, efficient and powered for what's next.

My jobs
My jobs
My jobs
My jobs
101 neighbors recently requested a quote
Recommended by45%of homeowners
Avatar for Voltsmith Electric
Voltsmith Electric
5.0(
13
)
Portable Generator - Install

Serving Schertz, TX and surrounding areas

Approved

In business since 2025

Emergency services offered

Warranties offered

"I had a fantastic experience with Voltsmith Electric. After hitting some confusion with a charger installation from another company, Mike came out, knew exactly what he was doing, and got our Level 2 EV charger installed and running at full power with no hassle. He was prompt, professional, meticulous with his work, and cleaned up everything before leaving. A completely smooth process from start to finish."
Commercial Lighting
Electrician Mike
Hot Tub Power
Kitchen Lighting
Dining Light

+23

18 neighbors recently requested a quote
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Generator Install FAQs, answered by experts

No, you should never plug a generator directly into a wall outlet in your house. This practice is extremely dangerous, often illegal, and can cause "back-feeding," where power from the generator flows back into utility lines, creating a life-threatening hazard for utility workers. It can also damage your home's electrical system, including appliances like pumps and HVAC fans. If the main power is restored while the generator is connected, it can destroy the generator and cause an electrical fire. To safely connect a generator, you must use a professionally installed transfer switch or an interlocking kit, which prevents back-feeding by disconnecting your home from the utility grid before the generator provides power.

A 10,000-watt generator can run a small to mid-sized central AC unit (typically up to 3 tons or 36,000 BTU) along with a few other appliances. However, larger AC units or additional loads will require a bigger generator. Consult a local generator installer to ensure you add the correct size generator to your home.

If you have a transfer switch properly installed, the generator and main electrical power cannot feed the system at the same time. However, you should still shut off the power at your main circuit breaker panel before activating the generator. If you do that, you’ll simply need to shut off the generator and reset your circuit breaker once the local power comes back on.

To power a central air system during a power outage, the whole-house generator will need to be at least 5,000 watts, and this number will significantly increase for larger units. Check the specific wattage requirements of your AC unit to choose the right generator size. Consider consulting a generator installer to ensure your whole-house generator meets your electrical load needs.

To determine the right size generator for your house, you should calculate the total wattage of the appliances and devices you want to power during an outage. List all essential items, note their start-up wattages, and add them together.

Here are some typical wattage requirements for common appliances:

  • Refrigerator: 600 watts

  • Large dehumidifier: 700 watts

  • Large window air conditioner: 1,400 watts

  • Water heater: 3,000 to 4,500 watts

  • Electric furnace: 5,000 to 25,000 watts

A 7,500-watt generator might be sufficient for essentials like a refrigerator, freezer, well pump, and lighting circuits. However, for high-demand items like a water heater or furnace, a whole-home generator is a better choice. A portable generator may be enough if you only need to power a few critical items.

While home square footage can offer a rough estimate, it is not always a reliable indicator. For reference, here are some typical generator sizes based on square footage:

  • 1,000 sq ft: 6–9 kW

  • 1,500 sq ft: 7–10 kW

  • 2,000 sq ft: 10–14 kW

  • 2,500 sq ft: 12–16 kW

  • 3,000 sq ft: 16–20 kW+

For the most accurate sizing, consult a professional who can calculate your home's peak and average power consumption and recommend the optimal generator.

The Schertz, TX homeowners’ guide to generator installs

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