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Avatar for HR Phoenix Electrical Services
HR Phoenix Electrical Services
4.4(
97
)

Serving Keller, TX and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"Paul and his team came out to install a generator. Excellent response, service and practical, honest counsel. Phoenix Electrical is now my #1 go-to for electrical needs."
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+14

38 neighbors recently requested a quote
Recommended by68%of homeowners
Avatar for Powertex Electric
Powertex Electric
5.0(
10
)

Serving Keller, TX and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"Casey from Powertex did a great job. He installed recess lighting, a ceiling fan and dimmers. He also fixed a electrical switch. He took great care to protect my space while he worked. I will use Powertex for all my electrical needs."
Panel Before
Panel During Re-wire
Panel Rewire & Cleanup
Tesla Wall Charger
Free Estimates

+8

6 neighbors recently requested a quote
Avatar for Tri-State Water, Power & Air
Tri-State Water, Power & Air
5.0(
5
)

Serving Keller, 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.

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108 neighbors recently requested a quote
Avatar for Wilder Electric, LLC
Wilder Electric, LLC
4.7(
78
)

Serving Keller, TX and surrounding areas

Approved

In business since 2018

Emergency services offered

Warranties offered

"Wilder Electric owner Christopher Bedford did a wonderful job installing new wiring to an outside building and working on upgrades to our home. He was a caring and hardworking person. I would recommend his company ."
Soda Shop
patio plug
She plug
The Brian house
Front

+34

Response time6 hrs
1 neighbors recently requested a quote
Recommended by98%of homeowners
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Generator Install questions, answered by experts

Costs range from $500 to $2,500, depending on generator type and installation complexity.

An undersized whole-house generator has the potential to overheat and shut down when you try to run a central AC system. This scenario can not only damage the whole-house generator, but can also trip your home’s breakers or cause electrical damage. To avoid this situation, hire a local generator installer to correctly size your whole-house generator.

Here’s what you can run with different wattages and types of generators:

Portable generator:

  • 2,000 watts can handle a large appliance like a freezer or refrigerator, plus a few smaller items like phones or computer chargers. 

  • 4,000 watts will keep two large appliances operating and a few smaller devices.

  • 8,000 watts should power most essential appliances and other devices, including a sump pump, well pump, or your dishwasher.

Partial to whole-house generator:

  • 20,000 watts and above will make it seem like your home’s power is still on.

A 1,500 square foot home will likely need a 15kW to 20kW generator. When deciding on whole-house generator size, add up the total wattage of the devices that you’d like to continue running during a power outage. That way, you can ensure you purchase a generator that can power your necessary appliances or medical equipment during an electrical emergency.

DIY is possible for basic setups. Professional installation ensures safe and proper electrical connections.

The Keller, TX homeowners’ guide to generator installs

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