Get matched with top generator install pros in Denmark, WI

Q: How long can a whole-house generator run continuously?

• <div><p>Whole-house generators can run continuously for extended periods, even for weeks at a time (around 400 to 500 hours), as long as they have a sufficient fuel supply. However, this type of extensive use will increase wear and tear and can shorten the generator's overall lifespan. During long periods of operation, it's important to check and refill the engine oil as needed, potentially as frequently as daily depending on the model. If your generator uses a fuel tank, ensure it is kept full to prevent unexpected shutdowns.</p></div>

Q: What can I run on different generator sizes?

• <div><p>Here&rsquo;s what you can run with different wattages and types of generators:</p><p>Portable generator:</p><ul><li><p>2,000 watts can handle a large appliance like a freezer or refrigerator, plus a few smaller items like phones or computer chargers. </p></li><li><p>4,000 watts will keep two large appliances operating and a few smaller devices.</p></li><li><p>8,000 watts should power most essential appliances and other devices, including a sump pump, well pump, or your dishwasher.</p></li></ul><p>Partial to whole-house generator:</p><ul><li><p>20,000 watts and above will make it seem like your home&rsquo;s power is still on.</p></li></ul><p></p></div>

Q: Can a portable generator power an entire home?

• <div><p>A portable generator can supply power to selected appliances and circuits in a home, but it's generally not designed to handle the entire household's electrical needs simultaneously. Portable generators have limited wattage capacity, so they are only designed to power essential devices and electronics temporarily until local power is restored. If your power needs outweigh the capabilities of a portable generator, consider installing a <a href="https://www.angi.com/articles/installing-whole-house-generator.htm">whole-home generator</a> instead. </p></div>

Q: What types of fuel do generators take?

• <div><p>Generators run on a variety of fuel types, ranging from natural gas to solar power. Keep in mind that fuel costs varying by type:</p><ul><li><p>Natural gas: $2,000&ndash;$21,000 per year </p></li><li><p>Liquid propane: $2,000&ndash;$21,000 per year</p></li><li><p>Diesel: $3,000&ndash;$20,000 per year</p></li><li><p>Gasoline: $500&ndash;$3,000 per year</p></li><li><p>Solar generator: $2,000&ndash;$25,000 per unit</p></li><li><p>Battery backup: $10,000&ndash;$25,000 per unit</p></li></ul><p></p></div>

Q: Do I need a permit to install a portable generator?

• <div><p>You may need a permit for a portable generator if you&rsquo;ll be installing a transfer switch for your primary residence or similar work. Otherwise, a permit for other uses may not be necessary. Check your local building codes or ask a local generator installer for more information about your local regulations.</p></div>

Enter your zip and get matched with up to 5 pros

Need a pro for your generator install project in Denmark, WI?

Select your specific project to find the pro for you.

Verified Reviews for Generator Install pros in Denmark, WI

*The Angi rating for Generator Install companies in Denmark, WI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.

*The HomeAdvisor rating for Generator Install companies in Denmark, WI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.

Last update on January 15, 2026

Reviewed in January 2026
I was very impressed with Eli and his team. I wanted to update the bathroom and his team brought a great experience from customer service to installation.
Home Improvement Of Wisconsin Inc
Request a quote
Reviewed in November 2025
Ted was very easy to work with. He was very knowledgeable about requirements for a furnace replacement. He recommended a Lenox furnace that was properly sized for my house. The old furnace was removed and the new furnace was installed without any issues. The furnace is operating perfectly.
Ridgeline Property Pros LLC
Request a quote
Reviewed in January 2025
Brent did great work installing my LVP Flooring.
Punchlist Pro Services
Request a quote
Reviewed in October 2024
Jerome was very professional and helpful. He was on time and completed the appliance install efficiently. While there he also fixed another item, that I thought was going to need replacement. His pricing is reasonable, work is professional and service top notch. Highly recommend!
Jerome's Handy Service
Request a quote
Reviewed in June 2023
Scott installed a barn door and some closet shelving for us. He stained the door installed the accessories. Looks great!
Custom Storage Solutions LLC
Request a quote
Reviewed in May 2023
Great service, affordable pricing for the product, wonderful follow-up and installation process. They send someone out to follow-up post-install to make sure everything was done proper and to expectations. Very pleased with experience.
Creative Home Technologies LLC
Request a quote
Reviewed in January 2023
From estimate to installation everything went right on time. They worked with us around the holidays. The installation crew did a great job and cleaned the house before leaving. We had to move a piano so they could work and they even helped move it back in place! Thom, Mike, Jordan and Dave...
Windows of Wisconsin Inc
Request a quote
Reviewed in October 2022
Our installer Dylan did a great a job and went above and beyond what was asked from him. Job No.: 508188
Mad City Windows & Baths
Request a quote
Reviewed in October 2022
The installers were efficient and professional.
All Weather Insulation
Request a quote
Reviewed in April 2022
I love how easy it is to operate our theater system now plus I can control our lighting, fireplace and heating from one remote. The installer was knowledgeable and professional. Our system works better than I could have imagined
Intelligent Home Systems
Request a quote

Find Generator install pros in Denmark

Wisconsin Generators LLC

5.0(

)

Serving Denmark, 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!!"

5 neighbors recently requested a quote

Request Quote

Complete Electric Service & Maintenance LLC

4.5(

)

Serving Denmark, WI and surrounding areas

Approved

In business since 2011

Free estimates

Warranties offered

"They do good work as agreed. Prices are fair and they clean up when done. Plus they came when they said they would!"

+23

9 neighbors recently requested a quote

Recommended by94%of homeowners

Request Quote

Emerald Electric, LLC

New to Angi

Serving Denmark, WI and surrounding areas

Approved

In business since 2022

Free estimates

Offers commercial services

Emerald Electric is proud to serve Wisconsin's electrical needs! Owner and operator Sawyer Effertz has over 12 years of experience in the industry. They're excited to take on new clients immediately. Call today for a free estimate on your next project!

Response time10 hrs

6 neighbors recently requested a quote

Request Quote

River White Remodeling

New to Angi

Serving Denmark, WI and surrounding areas

Approved

In business since 2010

Free estimates

River White Remodeling is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and responsibility in all of our jobs. We are a locally owned and operated business with more than 5 years of experience serving Appleton, WI and surrounding areas. There is no job too big, or too small for our team. Call today and let us put our experience to work for you

Request Quote

Complete Electric Service & Maintenance, LLC

4.5(

)

Serving Denmark, WI and surrounding areas

In business since 2011

Free estimates

Warranties offered

"Due to a home inspection we were required to have bonding wires installed in the basement. Mr. Erickson came and found that the bonding wires were already present. Completely honest and forthright. Said he was sorry he had to charge for the call. Great guy would hire again."

Lighting upgrade Photo shows old & new fixtures

Recommended by100%of homeowners

Serving Denmark, WI and surrounding areas

In business since 2008

Free estimates

"I had a short circuit that was found and corrected in 15 minutes, so I had him install some new fixtures, even replacing an outdoor light. Great work and reasonable price!"

$Panel\Wire Management$

Response time10 hrs

Recommended by100%of homeowners

Serving Denmark, WI and surrounding areas

In business since 2019

Free estimates

Emergency services offered

When it comes to your homes electrical, it has to be right. We specialize in everything from troubleshooting to remodeling, lighting solutions, EV charging, inspections and service upgrades. Residential and commercial expertise to safely get you up and running as soon as possible.

Request Quote

A&M General Construction LLC

4.6(

)

Serving Denmark, WI and surrounding areas

In business since 2021

Free estimates

Emergency services offered

"Great they are amazing and very professional they also demonstrate that they really care about there job."

+25

Response time7 hrs

Response rate100%

Recommended by87%of homeowners

Serving Denmark, WI and surrounding areas

In business since 2020

Emergency services offered

Credit card accepted

"The gentleman was very knowledgeable and got the job done in a timely manner,an also downloaded my printer onto my computer for me.Greatly appreacited it."

Helping a Victim who was being Cyber-stocked

Recommended by91%of homeowners

Request Quote

Action Electric Electrical Contractors, Inc.

4.4(

)

Serving Denmark, WI and surrounding areas

In business since 1994

Free estimates

Credit card accepted

"Contacted him, He assisted me in fixing it. No charge. Fixed as he suggested and heater is working fine."

Recommended by100%of homeowners

Request Quote

Showing 1-10 of 32

Generator Install questions, answered by experts

Whole-house generators can run continuously for extended periods, even for weeks at a time (around 400 to 500 hours), as long as they have a sufficient fuel supply. However, this type of extensive use will increase wear and tear and can shorten the generator's overall lifespan. During long periods of operation, it's important to check and refill the engine oil as needed, potentially as frequently as daily depending on the model. If your generator uses a fuel tank, ensure it is kept full to prevent unexpected shutdowns.

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.

A portable generator can supply power to selected appliances and circuits in a home, but it's generally not designed to handle the entire household's electrical needs simultaneously. Portable generators have limited wattage capacity, so they are only designed to power essential devices and electronics temporarily until local power is restored. If your power needs outweigh the capabilities of a portable generator, consider installing a whole-home generator instead.

Generators run on a variety of fuel types, ranging from natural gas to solar power. Keep in mind that fuel costs varying by type:

Natural gas: $2,000–$21,000 per year
Liquid propane: $2,000–$21,000 per year
Diesel: $3,000–$20,000 per year
Gasoline: $500–$3,000 per year
Solar generator: $2,000–$25,000 per unit
Battery backup: $10,000–$25,000 per unit

You may need a permit for a portable generator if you’ll be installing a transfer switch for your primary residence or similar work. Otherwise, a permit for other uses may not be necessary. Check your local building codes or ask a local generator installer for more information about your local regulations.

The Denmark, WI homeowners’ guide to generator installs

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

See all articles

Alison Kasch
•
Apr 4, 2026Apr 4, 2026
How Much Does It Cost to Install a Generator Transfer Switch? [2026 Data]
The cost to install a generator transfer switch depends on several factors. Our guide will help you understand all of the costs.
Alison Kasch
•
May 3, 2026May 3, 2026
How Much Does a Natural Gas Generator Cost? [2026 Data]
Natural gas generators are whole-home standby generators that are connected to your home’s natural gas line. The average cost for a natural gas generator is $12,000.
Taylor Freitas
•
Apr 6, 2026Apr 6, 2026
How Much Does a Whole-House Generator Cost? [2026 Data]
The average cost of a whole-house generator falls between $5,000 and $25,000. Keep reading to learn how much you can expect to spend.
Alison Kasch
•
Apr 8, 2026Apr 8, 2026
How to Hook Up a Generator to Your House: Essential Steps and Safety Tips
Portable generators ensure your essential appliances and electronics stay powered during an outage. Learn how to hook up a generator to your house.
Becca Lewis
•
May 3, 2026May 3, 2026
How to Use a Generator to Power Your House
Having a back-up power source in case of emergency is important. Here’s how to use a generator to power your house.
Tyler Lacoma
•
May 21, 2026May 21, 2026
How to Use a Portable Generator: A Complete Guide
Portable generators are handy for many reasons, but they require care to prevent fire, electrocution, and more. Stay safe with this guide on how to use a generator.