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  • Average homeowner rating star icon4.2
    Average homeowner rating
  • Verified reviews icon70
    Verified generator installs reviews

Find Generator install pros in Tomball

Avatar for Houston Home Generators
Houston Home Generators
5.0(
11
)
Fixed Generator - InstallGenerator - InstallGenerator - Install - For Business

Serving Tomball, TX and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"Houston Home Generators has installed dozens of Generac Generators for my business over the past year. The service is top notch and they go above and beyond to satisfy customers. I highly recommend them to anyone looking for a whole home generator."
Generac ATS install
Generator Project
Generac ATS install
Generator Project
Generac ATS install

+40

Response time1 day
28 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for 3 Guys Electric & Insulation
3 Guys Electric & Insulation
4.6(
158
)
Portable Generator - InstallFixed Generator - InstallGenerator - Install - For Business

Serving Tomball, TX and surrounding areas

Approved

In business since 2015

Free estimates

Warranties offered

"Outstanding service and top notch expertise. Install everything to code and corrected everything from the previous contractors. Did exactly what they quoted and installed everything with a clean and professional look Definitely recommend to anyone who needs electrical work"
Water Heater Wrap
Radiant barrier
Attic stair cover
Radiant Barrier/ blown in insulation
Reseal A/C duct

+44

Response time2 days
15 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for A1 Plus Electrical & Generators
A1 Plus Electrical & Generators
4.3(
1,359
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Tomball, TX and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"A1 Plus Electrical had the best price, and the electricians and plumber did excellent work! The only problem experienced was that it took 5 to 6 weeks for A1 Plus to get the permits approved after stating that they could get the permits approved and install the generator within 2 weeks. All other companies couldn't do the work for at least 2 months or longer! I had to contact A1 Plus general manager to get things moving after several permit submissions were rejected by the city. A1 Plus mitigated this time inconvenience by installing an electrical outlet in the garage at no cost, and once the permits were approved, everything was done within 7 days. Permits were approved on Friday, and installation started on the following Tuesday, and city permit inspections were done on the following Friday! All within one week! Would I hire A1 Plus to install my generator in the future? YES!"
Commercial Jobs
Commercial Jobs
Commercial Jobs
Commercial Jobs
Commercial Jobs

+48

Response time1 day
72 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Storm Guardian Generators
Storm Guardian Generators
4.0(
12
)
Fixed Generator - InstallGenerator - InstallGenerator - Install - For Business

Serving Tomball, TX and surrounding areas

Approved (Corporate)

In business since 2006

Free estimates

Emergency services offered

"Storm Guardian is a small family owned company. Of the three companies from which we obtained estimates I was most impressed with this company. The initial brochure with which I was presented when I  received the estimate was the most complete and informative about the company and the product.
Everyone was helpful. Myra and Cindy in the office were always very cordial and helpful in scheduling and giving me information. Example:Theywere very helpful in getting through the complexities of arranging meter pulls with the electric companies.The men that came for the installation were always on time and easy to work with (we had "mixed up" wiring in an old house). I was very satisfied with the whole process. It was a job well done.
"
Additional Photos
Response time1 day
Response rate99%
45 neighbors recently requested a quote
Avatar for Strategic Electrical Solutions, LLC
Strategic Electrical Solutions, LLC
5.0(
24
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Tomball, TX and surrounding areas

Approved

In business since 2021

Free estimates

Credit card accepted

"Fantastic experience. I called at 11:00a for a generator start up and they were there by 2p and finished in less than an hour. Professional, experienced, and friendly team. Will use them for all of my electrical needs moving forward. A+"
20 kw Cummins
Tesla Chargers in Apartment Parking Garage
Tesla Chargers in Apartment Parking Garage
20 KW Cummins
24 KW Generac

+7

Response time12 hrs
Response rate95%
9 neighbors recently requested a quote
Avatar for ARK Electrical Service
ARK Electrical Service
5.0(
10
)
Fixed Generator - Install

Serving Tomball, TX and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Warranties offered

"I had an issue in which none of the lights or receptacles worked in the master bedroom and master bath in one of my rent homes so I assumed one of the branch circuit breakers in the panelboard needed to be replaced. Jonathan troubleshooted the situation and determined the issue was actually five wires wired to the same terminal in the panelboard which over the years eventually caused the problem. He quickly rewired the wires to have each landing on their own terminal point, and the problem was solved for a very reasonable price. It is so great finding a contractor who is both knowledgeable and honest. I have found my electrician for any future electrical issues on my rent houses as well as my own home."
14 neighbors recently requested a quote
Recommended by90%of homeowners
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Showing 1-10 of 258
Generator Install questions, answered by experts

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 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.

While natural gas generators are costly, they’re a great option for standby power due to the reliability of natural gas as a fuel source. Unlike other fuels, natural gas is delivered through underground pipes, making outages extremely rare and less likely to be affected by the elements. As long as the area isn’t prone to earthquakes, they offer an unlimited supply of natural gas that doesn’t degrade over time or require storage in tanks.

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. 

You can determine what size generator you need for a transfer switch by matching the switch to the largest outlet on your generator. Larger generators can power up to 10 circuits, while most 5,000-watt generators can provide power to six circuits. So, if your generator’s largest outlet is 30 amps, you’ll need a 30-amp transfer switch.

The Tomball, TX homeowners’ guide to generator installs

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