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Avatar for GoGEN
GoGEN
4.8(
46
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Saint Hedwig, 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."
39 neighbors recently requested a quote
Recommended by47%of homeowners
Avatar for Asurance Electrical Contractors
Asurance Electrical Contractors
5.0(
34
)
Fixed Generator - Install

Serving Saint Hedwig, TX and surrounding areas

Approved

In business since 2006

Free estimates

Credit card accepted

"I recently had a light fixture installed in my office and an electrical outlet relocated to a different area, and I couldn’t be happier with the results. The electrician was professional, punctual, and paid close attention to every detail. The installation was clean, the work was completed efficiently, and everything looks and functions perfectly. It’s clear they take pride in their craftsmanship and customer service. I highly recommend them to anyone looking for quality electrical work. Thank you for doing such an amazing job!"
Gallery
Gallery
Gallery
EV charger install
EV charger install

+22

15 neighbors recently requested a quote
Recommended by76%of homeowners
Blackthorn Electric LLC
4.9(
8
)
Generator - Install - For Business

Serving Saint Hedwig, TX and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Free estimates

Emergency services offered

"Ronnie arrived on time, maintained good communications, and provided a good cost estimate for the EV outlet i needed. They even patched up the drywall in which most Electricians don't do. I would call him again."
AUTOZONE
AUTOZONE
Response time3 hrs
14 neighbors recently requested a quote
Recommended by75%of homeowners
South Texas Source Electrical Contracting
5.0(
5
)
Generator - Install - For Business

Serving Saint Hedwig, TX and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

"South TX Electrical has great customer service. Lazaro was timely and efficient. I was very happy with the quality of work and the attention to detail. He was very thorough and explained everything to include process and materials. I feel confident that the work was done correctly and with the best quality."
1 neighbors recently requested a quote
Avatar for Will Fix It
Will Fix It
1.0(
1
)
Fixed Generator - InstallFixed Generator - Repair

Serving Saint Hedwig, TX and surrounding areas

Approved (Corporate)

In business since 1994

Free estimates

Emergency services offered

Serving the greater San Antonio, TX area since 1994, we are the trusted local source for installation, repair, replacement, or troubleshooting and maintenance of all your plumbing, heating, and cooling needs. You can count on our fast and friendly specialists to provide safe, courteous service nights, weekends - or whenever you call -- 24/7. When our employees visit your home, rest assured that they have passed background and drug tests, and are equipped to provide you with the service you need. We treat you and your property with respect by calling before we arrive at your property, providing an honest, upfront estimate you approve before any work is done, and taking care of your property by using shoe covers and drop cloths as needed. \n

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Generator Install questions, 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.

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. 

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.

Energy output depends on turbine size, average wind speed at your site, and system efficiency. A 5 kW turbine in a good wind location can generate 8,000 to 12,000 kilowatt-hours per year, which may cover a large portion of an average home’s needs. Accurate output estimates require a professional wind assessment and a review of your household’s energy usage patterns.

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 Saint Hedwig, TX homeowners’ guide to generator installs

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