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Best generator install pros near Harper, TX

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Top-Rated Generator install pros in Harper - Updated Nov 2026

Ford Electric LLC
4.6(
31
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+2 more

Serving Harper, TX and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"Punctual, Professional and Properly trained! You canâ t hardly find anyone else around Kerrville that even has two of these qualities! Great insight and knowledge while helping me iron out the details on a small but complete electrical system, using custom pieces that are not standardized! Will definitely be calling him back for all future electrical needs."
Response time1 day
Response rate100%
6 neighbors recently requested a quote
Avatar for MSH POWER
MSH POWER
5.0(
3
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Harper, TX and surrounding areas

Approved

In business since 2007

Free estimates

Emergency services offered

"MSH power went above and beyond.by providing the knowledge, expertise and gave us a timely rebate from the manufacturer . He rated the various equipment as far as his experience too . This is tge company you should go with if you want a standby generator ."
We keep inventory
Country
Mobilization
Safety First
Ranch

+11

Response time20 mins
Response rate100%
Avatar for Will Fix It
Will Fix It
1.0(
1
)
Fixed Generator - InstallFixed Generator - Repair

Serving Harper, 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

Generator Installation
Scott’s Electric
New to Angi
Portable Generator - InstallPortable Generator - Repair

Serving Harper, TX and surrounding areas

Approved

We provide reliable, high-quality electrical services for residential, commercial, and light industrial customers. Our team specializes in electrical installations, repairs, maintenance, troubleshooting, panel upgrades, lighting, wiring, ceiling fan installation, EV charger installation, and electrical safety inspections. We are committed to delivering safe, efficient, and code-compliant solutions while providing exceptional customer service. Whether it's a small repair or a large electrical project, we take pride in completing every job with professionalism, integrity, and attention to detail.

Avatar for Trey D'Spain & Sons LLC
Trey D'Spain & Sons LLC
5.0(
9
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Harper, TX and surrounding areas

In business since 2023

Free estimates

Credit card accepted

"Trey D'Spain & Sons company did an excellent install of my Mini -Split AC system. The representative Mr. Kade were extremely professional, I shopped around and their price was very reasonable. They even gave me a first responders discount. I appreciate their quick install and hard work."
Response time8 hrs
Recommended by87%of homeowners
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Generator Install FAQs, answered by experts

To power a central air system during a power outage, the whole-house generator will need to be at least 5,000 watts, and this number will significantly increase for larger units. Check the specific wattage requirements of your AC unit to choose the right generator size. Consider consulting a generator installer to ensure your whole-house generator meets your electrical load needs.

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.

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. 

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.

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 Harper, TX homeowners’ guide to generator installs

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