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Avatar for Wisconsin Generators LLC
Wisconsin Generators LLC
5.0(
9
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Sun Prairie, WI and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"I cannot say enough great things about Jamie and the team at Wisconsin Generators LLC. From the very first conversation, Jamie was professional, knowledgeable, and incredibly responsive. He took the time to walk me through all my options, answered every question thoroughly, and made sure I felt confident in the decision we were making. The installation process was seamless. The crew showed up on time, worked efficiently, and treated our property with respect. Their attention to detail and commitment to doing the job right was obvious from start to finish. Everything was clean, organized, and completed exactly as promised. What really sets Jamie apart is his integrity and customer-first approach. There was no pressure just honest recommendations and clear communication. If you’re considering a standby generator, I highly recommend Jamie and Wisconsin Generators LLC. Reliable service, expert installation, and true peace of mind. Five stars all The way!!"
Whole house back up
Installation Trailer
New propane generator
Partial home backup
Partial home backup

+1

24 neighbors recently requested a quote
Avatar for Cardinal Heating & Air Conditioning
Cardinal Heating & Air Conditioning
4.8(
165
)
Fixed Generator - InstallFixed Generator - Repair

Serving Sun Prairie, WI and surrounding areas

Approved

In business since 1984

Free estimates

Emergency services offered

"I purchased a new HVAC system from Cardinal. Everything about the job went as planned, in the amount of time we were promised. The installers were professional and cleaned up the work space very well when they were finished. I would use Cardinal again without hesitation."
Cardinal Heating Air
Cardinal Heating Air
Cardinal Heating Air
Cardinal Heating Air
Cardinal Heating Air

+14

130 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for PRECISION POWER & ELECTRIC LLC
PRECISION POWER & ELECTRIC LLC
5.0(
10
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Sun Prairie, WI and surrounding areas

Approved

In business since 2024

Free estimates

Warranties offered

"How’s this? Full disclosure — I’m the proud parent of the guy behind Precision Power LLC, but I’d recommend Hunter even if I wasn’t! He’s a licensed Master Electrician who takes real pride in doing things the right way, not just the fast way. Hunter handled our new lighting and several electrical projects with professionalism, precision, and an eye for detail. He’s reliable, fair, and genuinely cares about his customers. If you want quality electrical work done right the first time, Precision Power LLC is the one to call."
Added cabinet lighting
Added cabinet lighting
Added cabinet lighting
Commercial work
Commercial work

+8

Response time4 hrs
Response rate100%
3 neighbors recently requested a quote
Avatar for All Comfort Services
All Comfort Services
5.0(
6
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Sun Prairie, WI and surrounding areas

Approved

In business since 1973

Free estimates

Emergency services offered

All Comfort Services is a 50+ year old employee-owned heating, cooling, plumbing, and electrical contractor serving residential and commercial customers in Dane and parts of Rock, Columbia, and Jefferson counties. We may need to confirm a specific zip code that we service. Our team understands that when you call a local electrician, you need a trained, certified, and insured professional who will arrive on time and be ready to provide the solutions you need. Our repair dispatch fee is $149.

Generator
Generator
Panel Installation
Service Upgrade
2 neighbors recently requested a quote
Avatar for Ls industrial repair
Ls industrial repair
5.0(
2
)
Portable Generator - Repair

Serving Sun Prairie, WI and surrounding areas

Approved

Free estimates

Small jobs welcome

Credit card accepted

"He showed up in a timely manner. He did the job quickly. There was a shorted wire that he had to re-run and pull through the existing pipe. So far it's all working great and has not needed to return. So far everything working great."
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Generator Install questions, answered by experts

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.

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.

Yes. You can connect your home back-up battery to a generator with its designated charger. Be sure that the output of the generator matches the input requirements for the battery for best results.

A home that is 2,500 square feet will likely need a 20kW to 25kW generator. Consult your local generator installer to confirm the generator size needed to power your home before purchasing a new one. Be sure to consider how much power your necessary devices need to run.

Natural gas generators are designed to run for extended periods of time, such as power outages during a natural disaster. Since there’s no limit to the supply of natural gas, they don’t need to stop for refills. However, generators do need maintenance, including pauses to check and add oil. Constantly running them will also cause a lot more wear and tear, leading to a shorter lifespan.

The Sun Prairie, WI homeowners’ guide to generator installs

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