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Avatar for Tri-State Water, Power & Air
Tri-State Water, Power & Air
5.0(
5
)
Fixed Generator - InstallGenerator - InstallGenerator - Install - For Business

Serving Allen, 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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104 neighbors recently requested a quote
Avatar for Hilliard Electric LLC DBA KC Electric Systems
Hilliard Electric LLC DBA KC Electric Systems
5.0(
8
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Allen, TX and surrounding areas

Approved

In business since 1994

Warranties offered

Small jobs welcome

"Needed electrical outlets updated and replaced. Also had freestanding generator outlet wired into my existing panel. All was done on time and did not exceed budget. Clark was honest, consultative, efficient, and engaging. Highly recommend!!"
DALLAS RESTAURANTS
DALLAS RESTAURANTS
DALLAS RESTAURANTS
DALLAS RESTAURANTS
PANEL RE-WORK

+1

Response time4 hrs
Recommended by12%of homeowners
Avatar for Electric Masters, LLC
Electric Masters, LLC
5.0(
17
)
Generator - Install - For Business

Serving Allen, TX and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

"I have zero complaints about this company. They came out very quickly to access my issue. It was urgent. From Oncor and this company, I clearly escaped what could have been a major fire. These guys were so professional and kept me in the loop of everything being done. I've saved their number for any future issues and I will definitely recommend them to anyone needing a skilled electrician. It was worth every penny to have it done professionally and safely. Thank you ALL."
Panel replacement
Panel replacement
Panel replacement
 surge protector
 surge protector

+41

Response time3 hrs
Response rate100%
60 neighbors recently requested a quote
Avatar for PROVISION ELECTRIC, LLC
PROVISION ELECTRIC, LLC
5.0(
13
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Allen, TX and surrounding areas

Approved

In business since 2025

Credit card accepted

Offers commercial services

"Provision Electric did an amazing job replacing our outdoor entryway light. He was incredibly flexible when Amazon delayed delivery of the fixture and still worked with our schedule. Installation was quick and efficient, and he even went above and beyond by running to get light bulbs when I completely forgot to buy them. Excellent service, professional, and truly cared about making sure everything was perfect. We’ll definitely be using Provision Electric again for any future electrical needs!"
Full residential rewire
Custom Home remodel
Custom Home remodel
Industrial power
Industrial power

+24

1 neighbors recently requested a quote
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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.

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.

Yes, in some locations, it is required by the National Electric Code (NEC) to have a transfer switch installed for electrical emergencies. In addition to following electrical code, generator transfer switches ensure your home is fully protected during a power outage. By switching the power from the main breaker to the generator breaker, you can seamlessly operate your HVAC, lights, appliances, devices, and more during an emergency. 

Whole-house generators need to be installed on level ground several feet away from walls and other objects. Because they tap into the electrical system directly, they usually need to be close to your home electrical panel for a transfer switch installation. It also helps with installation if they are near to a gas line or propane tank installation.

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 Allen, TX homeowners’ guide to generator installs

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