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Avatar for Streib Company
Streib Company
4.7(
161
)

Serving Sappington, MO and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"Streib was extremely professional, courteous, patient, and friendly throughout the entire process. They did a great job with the installation - the city inspector was impressed by their work. Additionally, everyone I interacted with was just so nice. It made for a very pleasant and stress-free experience."
Additional Photos
Additional Photos
Solar Panel Install
Additional Photos
Additional Photos

+7

Response time2 days
9 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for J BATHE ELECTRIC
J BATHE ELECTRIC
4.7(
41
)

Serving Sappington, MO and surrounding areas

Approved

In business since 1945

Free estimates

Warranties offered

"We highly recommend JBathe Electric. They were very knowledgeable and professional! They were very reasonably priced! From the office staff to the installers the customer service was superb!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+20

Response time2 days
Response rate87%
12 neighbors recently requested a quote
Avatar for Potts Electric, LLC
Potts Electric, LLC
4.8(
24
)

Serving Sappington, MO and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Emergency services offered

Warranties offered

"Under cabinet light install. The technician was great. He confirmed that the job would be out of my price range and gave me an alternate solution. I felt that he was honest and wasn't pushy."
Panel upgrade
Panel upgrade
Light switch
Light switch
Outdoor light

+2

Response time1 day
Response rate90%
177 neighbors recently requested a quote
Avatar for N3 Electrical Services
N3 Electrical Services
4.9(
42
)

Serving Sappington, MO and surrounding areas

Approved

In business since 2017

Free estimates

Credit card accepted

"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
Recommended by97%of homeowners
Avatar for Power Up Electrical Contractors, LLC
Power Up Electrical Contractors, LLC
4.5(
19
)

Serving Sappington, MO and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Emergency services offered

"Hired “Power Up” to refit our electrical panel and install an outside connecting plug to run a new portable electric generator. Jeff came out and spent time to evaluate and discuss our needs. He was consultative throughout the whole process. Lisa was responsible for arranging installation and paperwork and was very responsive to inquiries as well as reaching out to confirm things were moving forward. Justin was our installer and he knew his stuff. Very friendly and completed the work on time and as expected. Great experience working with “Power Up.”"
33 neighbors recently requested a quote
Recommended by82%of homeowners
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Showing 1-10 of 337
Generator Install questions, 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.

The cost to install a whole-house generator averages $5,200, with a typical price range of $1,500 to $8,900. However, total costs can vary from $400 for a small portable unit to over $18,000 for a large-capacity system. The most significant cost factor is the generator's size and capacity, but other variables include the brand, fuel type, and labor for assembly and installation.

Generator costs can be broken down by type:

  • Portable or Emergency Backup Generators (1kW–7.5kW): $500 to $2,000

  • Partial-Home Generators (9kW–20kW): $2,000 to $6,500

  • Whole-House Generators (22kW–48kW): $5,000 to $18,000

To avoid paying for more power than you need, consider hiring an electrician to calculate the electrical load for your essential appliances. It is also recommended to get at least three quotes to find the best deal for your specific needs and budget.

Portable generators provide backup power for essential appliances during outages and are easy to relocate.

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’re deciding between a solar battery versus a generator for the best backup power solution, you can take a few factors into consideration. Solar batteries are quiet while generators can be quite loud. Generators have a lower up-front cost, but they require fuel and ongoing maintenance while solar batteries are more expensive but don’t have many ongoing costs.

The Sappington, MO homeowners’ guide to generator installs

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