Is it better to repair or replace a malfunctioning generator?

• <div><p>It’s usually better to repair your generator if it isn’t working properly, as it will typically be much more affordable and should yield similar results. Generator repairs cost around <b>$300</b> on average, while <a href="https://www.angi.com/articles/how-much-does-it-cost-install-generator.htm">installing a new whole-house generator costs</a> around <b>$5,000 </b>on average. The only exception is if you know your generator is reaching the end of its useful life, usually between 30 and 40 years. If you have an older generator, you could face multiple repairs in the coming years, which might mean that a full replacement will be more cost-effective over time.</p></div>

Get matched with top generator install pros in Niagara, WI

Q: What are the benefits of a portable generator?

• <div><p>Portable generators provide backup power for essential appliances during outages and are easy to relocate.</p></div>

Q: Is it better to repair or replace a malfunctioning generator?

• <div><p>It&rsquo;s usually better to repair your generator if it isn&rsquo;t working properly, as it will typically be much more affordable and should yield similar results. Generator repairs cost around <b>$300</b> on average, while <a href="https://www.angi.com/articles/how-much-does-it-cost-install-generator.htm">installing a new whole-house generator costs</a> around <b>$5,000 </b>on average. The only exception is if you know your generator is reaching the end of its useful life, usually between 30 and 40 years. If you have an older generator, you could face multiple repairs in the coming years, which might mean that a full replacement will be more cost-effective over time.</p></div>

Q: Do I really need a generator transfer switch?

• <div><p>Yes, in some locations, it is required by the National Electric Code (NEC) to have a transfer switch installed for <a href="https://www.angi.com/articles/what-is-an-electrical-emergency.htm">electrical emergencies</a>. In addition to following electrical code, generator transfer switches ensure your home is fully protected during a power outage. By switching the power from the main breaker to the generator breaker, you can seamlessly operate your HVAC, lights, appliances, devices, and more during an emergency. </p></div>

Q: What size generator do I need for a 2,500-square-foot house?

• <div><p>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.</p></div>

Q: What size of diesel generator do you need to run a house?

• <div><p>Sizing a generator is a careful process that requires calculating the <a href="https://www.angi.com/articles/electrical-load-calculation.htm">electrical load</a> of your entire house. You have to take into account every device you want to use and their wattage requirements, plus the wattage needed to start them, and look for a generator that can safely run all that at around 80% capacity.</p><p>In more practical terms, a small home can run on a 10,000-watt generator (and if you only want to power a few key appliances, much less than that). A mid-sized home may need something between 15,000 and 22,000 watts. Larger homes require 25,000 watts or more. </p></div>

Enter your zip and get matched with up to 5 pros

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

Select your specific project to find the pro for you.

Verified Reviews for Generator Install pros in Niagara, WI

*The Angi rating for Generator Install companies in Niagara, 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 Niagara, 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 March 10, 2025

Reviewed in March 2025
Brew City Builders was a pleasure to have done business with. From scheduling with Amy to our project completion, it was a smooth process. They were very attentive to our design ideas and communicated with us throughout the project. We had 2 porches/decks as well as a custom fabricated fence...
Brew City Builders Decks
Request a quote
Reviewed in June 2023
I request a job to remove a claw foot tub from bathroom and install a new walk in shower. He completed half the project and then left his money. I paid him because he assured me that my bathroom would be completd by the end of May.
RC Custom Builders, LLC
Request a quote
Reviewed in October 2022
Very good worker .On time for work. Excellent installation work. Would hire again.
EDI PAINT LLC
Request a quote
Reviewed in February 2022
Great product, very professional inspection & installation team!! Completed the entire project in about 6 hrs.
Mad City Windows & Baths
Request a quote
Reviewed in January 2022
We have had Rick do several projects for us from snow removal, remodeling, landscaping, installing vinal flooring, drywall installation and painting and have found his work to be excellent. He is very meticulous in all phases of his work including cleanup after completion. I have and will...
RL Handyman Service
Request a quote
Reviewed in April 2021
We are very pleased with the work performed on our gutters and downspouts by Chad and his team from Sodak LLC. Chad was particularly helpful with solving a problem with one section of existing gutter and recommended a larger size that we had his team install. His team was very efficient and...
Sodak, LLC
Request a quote
Reviewed in November 2019
the sales people are so knowledgeable, the company was very prompt and delivered on all it's promises. The installation guys were friendly, clean and helpful. I love that my house feels warmer and my furnace can be kept lower without me feeling cold.
Mad City Windows & Baths
Request a quote
Reviewed in August 2018
Dan showed up precisely on time, quickly determined the problem and told me what was wrong and how it needed to be fixed. He suggested using a smaller expansion tank as he said the one originally installed was bigger than it needed to be. Going with the smaller tank saved me $400. He said...
Suburban Installers, Inc.
Request a quote
Reviewed in January 2018
From the time we first met with Grant, we felt like we were his only clients. He worked with us to create a plan that was within our budget, and an agreed upon timeline. Grant listened to our ideas, and he gave us new ideas we had not thought of on our own. His crew members were prompt,...
Grant Thompson Construction, Inc.
Request a quote

Find Generator install pros in Niagara

Wisconsin Generators LLC

5.0(

)

Serving Niagara, WI and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"Very prompt and professional, installation was in a timely manner. Very helpful with any questions and explanations. After job was complete. Highly recommended."

29 neighbors recently requested a quote

Serving Niagara, WI and surrounding areas

In business since 2002

Free estimates

Emergency services offered

"First, they were recommended to us for the whole house generator by home depot. We were so happy with the generator that we had him do a bathroom fan at my house and a bathroom fan at my son's house. I did some checking and that was a reasonable price. With the work he did, it was more than reasonable. The job was a little more involved than he thought it would be and he didn't have any problem with any of it. Without anything to judge the pricing from, other than online and a couple of guys I had come over who weren't on the same page as me, I'd say excellent. The quality was top of the line. As soon as he got the generator, he got over here to put it in. As a matter of fact, I am thinking about calling him again for something."

Recommended by50%of homeowners

Request Quote

MT Electric, LLC - Poetna Facebook

5.0(

)

Serving Niagara, WI and surrounding areas

In business since 2012

Free estimates

Offers commercial services

"Fast, friendly, courteous and always punctual!"

Response time10 mins

Recommended by100%of homeowners

Request Quote

Generator Install questions, answered by experts

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

It’s usually better to repair your generator if it isn’t working properly, as it will typically be much more affordable and should yield similar results. Generator repairs cost around $300 on average, while installing a new whole-house generator costs around $5,000 on average. The only exception is if you know your generator is reaching the end of its useful life, usually between 30 and 40 years. If you have an older generator, you could face multiple repairs in the coming years, which might mean that a full replacement will be more cost-effective over time.

Yes, in some locations, it is required by the National Electric Code (NEC) to have a transfer switch installed for electrical emergencies. In addition to following electrical code, generator transfer switches ensure your home is fully protected during a power outage. By switching the power from the main breaker to the generator breaker, you can seamlessly operate your HVAC, lights, appliances, devices, and more during an emergency.

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.

Sizing a generator is a careful process that requires calculating the electrical load of your entire house. You have to take into account every device you want to use and their wattage requirements, plus the wattage needed to start them, and look for a generator that can safely run all that at around 80% capacity.

In more practical terms, a small home can run on a 10,000-watt generator (and if you only want to power a few key appliances, much less than that). A mid-sized home may need something between 15,000 and 22,000 watts. Larger homes require 25,000 watts or more.

The Niagara, 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
•
Jul 10, 2026Jul 10, 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.
Taylor Freitas
•
Jul 9, 2026Jul 9, 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
•
Jul 8, 2026Jul 8, 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.
Dan Simms
•
May 21, 2026May 21, 2026
How to Hire a Generator Installer
Generators should give you peace of mind, but you’ll only get that if your installer knows what they’re doing. Learn how to hire a pro and what red flags to look for.
Heather Ayer
•
Jul 8, 2026Jul 8, 2026
Whole-House Generator Installation: A Complete Guide
Whole home generator installations require a professional hand. Read this guide to help you decide which generator is best for your home.
Becca Lewis
•
Jul 9, 2026Jul 9, 2026
Who Installs Generators? A Complete Guide
Wondering who to hire to install a generator? Consult this guide to learn who to hire to install a generator or a transfer switch.