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Avatar for NextGen Electric
NextGen Electric
4.7(
33
)
Fixed Generator - InstallGenerator - InstallPortable Generator - Install

Serving Rogersville, MO and surrounding areas

Approved

Super Service Award Winner

In business since 2017

Free estimates

Emergency services offered

"Hans was prompt returning my request for service, and showed up exactly on time. He installed my charging unit for my new hybrid in my garage where I wanted it, along with 2 surge suppressors for my 2 breaker boxes. After finishing the install, he cleaned up behind himself along with the leaves, etc. that had accumulated over the years. His price was fair and I'd definitely hire him for more work in the future. Nice young man to boot!"
Electrical Project
Electrical Project
Electrical Project
Electrical Project
Electrical Project

+70

Response time3 days
Response rate100%
11 neighbors recently requested a quote
Avatar for N3 Electrical Services
N3 Electrical Services
4.9(
47
)
Fixed Generator - Install

Serving Rogersville, MO and surrounding areas

Approved

In business since 2017

Free estimates

Warranties offered

"I hired N3 Electrical to replace my main electrical service panel, install a lock out switch for an emergency generator and run a new circuit to my patio. All the agreed upon work was completed on time and on budget. I was very pleased with the work I will definitely use this company again highly recommend."
Service
Service
Panel
Panel
Post light

+32

Response time1 day
7 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Tri-State Water, Power & Air
Tri-State Water, Power & Air
New to Angi
Fixed Generator - InstallGenerator - InstallGenerator - Install - For Business

Serving Rogersville, MO and surrounding areas

Approved (Corporate)

In business since 1992

Free estimates

Emergency services offered

We are the experts in the field of Whole Home Standby Generators, with over 20 years of experience in the game. We provide turn-key installation by licensed professionals - 24 hour emergency service - Remote Monitoring - Long term maintenance and service by factory trained technicians. \nYou can trust our team, knowing that we have a Triple-A Rating with the Better Business Bureau and received the BBB Torch Award for Ethics. We look forward to discussing your needs and providing a recommendation and services you can rely on. \n

Response time1 day
Response rate100%
81 neighbors recently requested a quote
Avatar for Barker Electric Company, LLC
Barker Electric Company, LLC
5.0(
10
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Rogersville, MO and surrounding areas

In business since 2020

Free estimates

Warranties offered

"Barker Electric was fantastic. Brian and his crew installed all the electric in my new build, from placing floor outlet receptacles and conduit prior to foundation pour, to planning the inside and outside lights and outlets, to installing the light above my sink. Brian and his crew were professional, punctual, and completed all the tasks they said they would! I highly recommend Barker Electric! I will hire them again !"
MDP
Conduit and panels
Conduit rack
Gutters and panels
MDP

+1

Response time2 days
Recommended by10%of homeowners
Avatar for Jilmoa Construction & Demolition
Jilmoa Construction & Demolition
4.7(
24
)
Generator - Install - For BusinessPortable Generator - Install

Serving Rogersville, MO and surrounding areas

In business since 2002

Free estimates

Emergency services offered

"Be very specific with your communication, and have them approve all costs first. They were very nice, accommodating, and respectful. However, they rented a large piece of equipment, adding $2000 to the cost of the project, without getting approval from us. They also said they would "work with us to make this right." But we never heard back from them. The end product is satisfactory, and we would recommend them to others."
Roof Down
Roof Down
Marshfield Demo Site
Electrical
New Home

+76

Response time1 day
Recommended by94%of homeowners
Sirb Electric, Inc.
4.3(
12
)
Fixed Generator - Install

Serving Rogersville, MO and surrounding areas

In business since 2007

Free estimates

"Paul Sirb is a consummate pro. He is congenial, precise and efficient in his trade as a master electrician. I recommend him for all of your electrical needs, without reservation. Rarely do you find a skilled tradesman who has every attribute necessary to leave you completely satified with his work, pricing and efficiency."
Response time3 hrs
Response rate85%
Recommended by81%of homeowners
Showing 1-10 of 24
Generator Install questions, answered by experts

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.

If you’re wondering if you can use your electric vehicle as a backup battery, it depends on whether your EV is compatible with bidirectional charging. This technology allows energy to flow both ways, enabling vehicle-to-home (V2H) backup power, vehicle-to-load (V2L) for appliances and camping, and vehicle-to-grid (V2G) to support the power grid. Compatible EVs convert stored DC energy into usable AC power, helping reduce energy costs and enhance grid stability while providing emergency backup power.

You can expect a diesel generator to last for up to 30,000 hours of use, which works out to 20 to 25 years with the proper maintenance, of course. That depends on how much you use it, so a diesel generator used for emergencies a couple of times a year will last a lot longer than a generator that takes over for a faulty electrical grid every month for a day or two. 

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.

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.

The Rogersville, MO homeowners’ guide to generator installs

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