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Avatar for GoGEN
GoGEN
4.8(
48
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Schertz, TX and surrounding areas

Approved

Super Service Award Winner

In business since 1994

Free estimates

Warranties offered

"They installed a whole house Generac generator in less than 4 hours.. very satisfied with their service. Excellent work ethic, answered all my questions, install has a very clean appearance, they were in and out as they said they would be. Did not leave a mess behind. I strongly recommend using GoGen for electrical and Generator service and install needs."
50 neighbors recently requested a quote
Recommended by45%of homeowners
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

"Professional, friendly, knowledgeable. The job was exactly what Gerardo said it would be. No hissing costs. No stress. No surprises. Gerardo and his crew were at the house and got it all done: both inside and outside electrical panels, an additional socket Iâ m the master bath, repair faulty wiring and install ceiling light, generator interlock for the house. Tidied up, went through tutorial on how to use the generator interlock when the power is out. Took care of a the contact with the electric company and permits, inspection. 5 stars. Canâ t say enough good things about Gerardo and his crew."
Side View #3
Rear View #1
Side View #2
Side View #1
Hallway

+208

Response time1 day
9 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Alamo Lighting & Electric
Alamo Lighting & Electric
4.9(
39
)
Generator - Install - For Business

Serving Schertz, TX and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"So quick... performed the service the same day as the quote. They installed 3 new ceiling fans in a 22-foot tall room and made it look so simple. I will definitely call them back to do other electrical work around my home."
Response time1 day
Recommended by97%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

"James was prompt and did a thorough job. Heâ s very polite and easy to work with. Cleaned up after himself. Weâ ve not had any problems and the generator works exactly as it should when weâ ve had a power outage."
2023
2023
2023
2023
2023

+18

Response time5 hrs
1 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for Beyer Electrical
Beyer Electrical
4.6(
23
)
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
36 neighbors recently requested a quote
Recommended by47%of homeowners
Avatar for Voltsmith Electric
Voltsmith Electric
5.0(
12
)
Portable Generator - Install

Serving Schertz, TX and surrounding areas

Approved

In business since 2025

Emergency services offered

Warranties offered

Voltsmith Electric provides professional residential and commercial electrical services throughout New Braunfels and the greater San Antonio area. Our work is performed to focus on safe, code-compliant installations, proper diagnostics, and long-term solutions, not quick fixes.\n\nWe specialize in panel upgrades, dedicated circuits, EV charger installations, electrical troubleshooting, lighting upgrades, remodels and whole-home surge protection. Most projects begin with an on-site evaluation to ensure the correct solution and a clear scope of work.

Commercial Lighting
Electrician Mike
Hot Tub Power
Kitchen Lighting
Dining Light

+13

20 neighbors recently requested a quote
Blackthorn Electric LLC
4.9(
8
)
Generator - Install - For Business

Serving Schertz, TX and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Free estimates

Emergency services offered

We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.\n

AUTOZONE
AUTOZONE
Response time3 hrs
11 neighbors recently requested a quote
Recommended by75%of homeowners
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Generator Install questions, 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. 

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

If you’re wondering if you can use your electric vehicle as a backup battery, it depends on whether your EV is compatible with bidirectional charging. This technology allows energy to flow both ways, enabling vehicle-to-home (V2H) backup power, vehicle-to-load (V2L) for appliances and camping, and vehicle-to-grid (V2G) to support the power grid. Compatible EVs convert stored DC energy into usable AC power, helping reduce energy costs and enhance grid stability while providing emergency backup power.

The cost to install a whole-house generator averages $5,200, with a typical price range of $1,500 to $8,900. However, total costs can vary from $400 for a small portable unit to over $18,000 for a large-capacity system. The most significant cost factor is the generator's size and capacity, but other variables include the brand, fuel type, and labor for assembly and installation.

Generator costs can be broken down by type:

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

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

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

To avoid paying for more power than you need, consider hiring an electrician to calculate the electrical load for your essential appliances. It is also recommended to get at least three quotes to find the best deal for your specific needs and budget.

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.

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.