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Avatar for Potts Electric, LLC
Potts Electric, LLC
4.8(
25
)
Fixed Generator - Install

Serving Des Peres, MO and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Emergency services offered

Warranties offered

"I am happy to share this review about Steven. He assisted Anthony with the installation of a new electrical panel, smoke and carbon monoxide detectors, and ceiling light fixtures. Steven was very conscientious and skillful. He was a pleasure to work with and was very respectful of my home by keeping the job site very clean. I feel confident that the work performed by Steven was to the highest level of quality standards."
Panel upgrade
Panel upgrade
Light switch
Light switch
Outdoor light

+2

Response time11 hrs
Response rate98%
171 neighbors recently requested a quote
Avatar for Wells Electric LLC
Wells Electric LLC
5.0(
5
)
Fixed Generator - InstallFixed Generator - Repair

Serving Des Peres, MO and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

With over 20 years of experience, we’re a licensed, family-owned electrician proudly serving Warrenton and the surrounding areas—including St. Louis, St. Charles, Warren, and Franklin Counties. From expert electrical repairs to new home build wiring and generator installation, we bring dependable service, quality craftsmanship, and peace of mind to every job. Fully licensed in the state of Missouri and St. Charles County, we’re here to power your home or business with skill and care you can trust.

Response time2 days
Response rate100%
7 neighbors recently requested a quote
Avatar for Tri-State Water, Power & Air
Tri-State Water, Power & Air
4.8(
37
)
Fixed Generator - Install

Serving Des Peres, MO and surrounding areas

Approved

In business since 1993

Free estimates

Emergency services offered

"Kelly installed a new toilet for us. He did a superb job and he deserves a raise. He has such a great attitude. He is a keeper & again, he deserves a raise!! And I am not his mother or grandmother."
My jobs
My jobs
My jobs
My jobs
My jobs

+3

45 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Power Up Electrical Contractors, LLC
Power Up Electrical Contractors, LLC
4.5(
19
)
Fixed Generator - InstallPortable Generator - InstallGenerator - Install+1 more

Serving Des Peres, MO and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Emergency services offered

"I was very happy with the service. They did a great job twice now for me. The electrician was the best and very professional. Knew exactly what he was doing and did it well. I will use them again and will recommend them to everyone"
26 neighbors recently requested a quote
Recommended by82%of homeowners
Avatar for FixPro
FixPro
5.0(
5
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Des Peres, MO and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

FixPro is a locally owned and operated handyman service proudly serving St. Louis, St. Charles, Lincoln, Warren, Franklin, and Jefferson Counties. We specialize in high-quality home repairs, carpentry, drywall, painting, flooring, deck repair, and general maintenance—handling everything from small fixes to larger improvement projects with precision and professionalism.\n\nWith years of hands-on experience across construction, maintenance, and service industries, I built FixPro to deliver what most contractors don’t: clear communication, reliable scheduling, and work done right the first time. We show up when we say we will, diagnose issues properly, and provide straightforward solutions without cutting corners.\n\nOur approach is simple—treat every home like it’s our own. We focus on clean workmanship, long-term durability, and customer satisfaction. If you want it done right the first time, FixPro is ready.\n\nNeed Something Fixed? Hire a Pro.

1 neighbors recently requested a quote
Avatar for VMK Remodeling
VMK Remodeling
4.2(
19
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Des Peres, MO and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Warranties offered

"FIREPLACE ELECTRICAL INSERT!! We hired Vinc and crew a second time to make the fireplace insert happen. They worked very hard to modify the old brick opening and seal everything up properly. Vinc has great suggestions and ideas! He created us a one of a kind beautiful year round updated look for our home we love & been enjoying for two weeks! We will hire him again!"
Response time2 days
Response rate90%
30 neighbors recently requested a quote
Showing 1-10 of 50
Generator Install questions, answered by experts

With proper maintenance, a whole-house generator can last between 20 and 40 years. The specific lifespan depends on how often and for how long the generator is used, and some models may have their life expectancy rated in hours of operation. To maximize its lifespan, expect to spend around $150 to $300 per year for annual maintenance checks from a qualified technician. During these checks, a technician will inspect the engine filter, starting mechanism, fuel, lubrication, and coolant levels. Consulting your installer and choosing a low-impact fuel like natural gas or diesel can also help ensure your generator lasts as long as possible.

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.

If your home already has a grinder pump and you’re still noticing issues (like frequently clogged toilets and sinks), it could be time to upgrade your grinder pump. Start by checking your existing horsepower. If there are four or fewer people living in your home, using a 1/2-horsepower grinder pump should be sufficient. Larger households should consider investing in a 1-horsepower grinder pump to maximize wastewater removal efforts.

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.

No, you should never plug a generator directly into a wall outlet in your house. This practice is extremely dangerous, often illegal, and can cause "back-feeding," where power from the generator flows back into utility lines, creating a life-threatening hazard for utility workers. It can also damage your home's electrical system, including appliances like pumps and HVAC fans. If the main power is restored while the generator is connected, it can destroy the generator and cause an electrical fire. To safely connect a generator, you must use a professionally installed transfer switch or an interlocking kit, which prevents back-feeding by disconnecting your home from the utility grid before the generator provides power.

The Des Peres, MO homeowners’ guide to generator installs

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