How long does a whole-house generator last?

• <div><p>When maintained properly, a whole-house generator can last up to <b>20 years</b>. <a href="https://www.angi.com/articles/how-much-does-generator-repair-cost.htm">Costs to maintain and repair generators</a> vary by location and type of generator, but you can expect to pay about <b>$150 to $300 per year</b> for annual generator maintenance checks. An experienced generator service technician will inspect your generator’s engine filter, starting mechanism, fuel, lubrication, and coolant levels to keep your generator in good working condition for as long as possible. </p></div>

Can I plug my generator directly into my house?

• <div><p>No, you cannot plug a generator directly into a wall outlet in your home. Plugging in a generator without an interlocking kit, extension cord, or wall outlet receptacle is incredibly dangerous and can cause back-feeding—power from the generator back-feeds into utility lines. Also, if the main power comes back on while your generator is on, it could damage the generator and cause a house fire.</p></div>

Does installing a generator increase home value?

• <div><p>Yes,<a href="https://www.angi.com/articles/generator-installation-avoid-electrical-disasters.htm"> installing a generator</a> usually increases your property value because buyers are getting the added peace of mind knowing they’ll be able to maintain power through blackouts. In most cases, you should see close to a 100% return on investment (ROI). Keep in mind that home generators usually need a permanent foundation, and installing a concrete slab will likely raise your property taxes slightly. </p></div>

Get matched with top generator install pros in Holmen, WI

Q: How much does it cost to install a whole-house generator?

• <div><p>The <a href="https://www.angi.com/articles/how-much-does-it-cost-install-generator.htm">cost to install a whole-house generator</a> averages at <b>$5,200</b>, but costs can range from <b>$1,500 to $8,900,</b> depending on the type and size of the generator, and the labor required to install it. To find the best deal while still ensuring the unit meets all the needs of your household, hire an electrician to calculate the electrical load of your must-have appliances and electronics beforehand so you don&rsquo;t pay for more power than you need. As always, be sure to get at least three quotes to find the ideal fit for your needs and budget.</p></div>

Q: Can I use a generator to charge a back-up battery?

• <div><p>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.</p></div>

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Verified Reviews for Generator Install pros in Holmen, WI

*The Angi rating for Generator Install companies in Holmen, 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 Holmen, 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 November 06, 2025

Reviewed in July 2024
Let me start with the sales pitch and followed by the installation: Sales: The person came to our house, looked at the windows and we sat down and went over several options. It took about 1 hour total which might sound a lot... but if anyone knows much about windows is that they are pricey in...
Mad City Windows & Baths
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Reviewed in May 2023
The general contractor, moving company recommended, flooring installers, painter, and plumber were all absolutely amazing. They were professional, communicated every step of the way, on time, efficient, and their work is beautiful. I recommend each of them at the highest of level. Iâ ve...
Holtzman Remodeling, LLC
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Reviewed in April 2023
I also had an outlet plug-in for a generator installed.
Oak Ridge Electric, LLC
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Reviewed in January 2023
Shawn Farr is excellent and knows everything about generator repair and upkeep. He keeps to the agreed schedule and is very reasonable in pricing. Jim Theler, Viroqua WI
Farr Services, LLC
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Reviewed in January 2023
Austin was great to work with and we are waiting the installation!
River Valley Remodelers, LLC
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Reviewed in April 2017
beyond the average call, Jeff was fantastic, and when the power company was long overdue went and got a generator and Dave to power up the house, check circuits and get our water well going -14 hours at our house He's, they are like family now.
Wettstein Brothers Electric Inc
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Reviewed in November 2016
Deb did a great job. It was a big project as the house had many layers of dirt, smoke, and general dust from previous owners as well as from the renovation work that had just finished. By the time Deb was finished (it took about 6 sessions) my house felt homey. No more dust and grunge! I also...
Deb's Affordable Cleaning Service
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Reviewed in November 2016
Professional. We always use Mr. Thompson's wife Gene. She is nice with the animals, and the animals seem to really like her.
Thompson Animal Medical Center
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Reviewed in October 2015
Remodeled home to handicap/wheelchair accessible. Overall, the remodel went extremely well. It was hard for my wife and me as we were staying in a hotel while the work was being done. I am in a wheelchair recovering from a spinal cord injury and that's the reason for the remodel. Removing...
VOSS & SONS CONSTRUCTION
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Reviewed in July 2012
The general knowledge that they have, and they are pretty good about remembering that I have had some pups. They are honest and upfront about what’s going on. My overall experience has been excellent.
Bangor Veterinarian Services
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Find Generator install pros in Holmen

Wettstein Brothers Electric Inc

214 Vine St

4.88(

)

Wettstein Brothers Electric Inc

214 Vine St

4.88(

)

Customers say: Quality work

Recommended by 100% of Angi customers

3rd Generation locally owned electrical contractor with 60+ years of experience. On call 24/7 for emergencies - dial number and press 1.

"Job went very well. Workers were prompt and did a great job. Job cost was in line with the estimate & the office people were also easy to work with. Would hire them again and will definitely recommend them."

Nancy Y on October 2018

3rd Generation locally owned electrical contractor with 60+ years of experience. On call 24/7 for emergencies - dial number and press 1.

"Job went very well. Workers were prompt and did a great job. Job cost was in line with the estimate & the office people were also easy to work with. Would hire them again and will definitely recommend them."

Nancy Y on October 2018

My Classic Car Trader LLC

312 Prospect Ave

2.00(

)

My Classic Car Trader LLC

312 Prospect Ave

2.00(

)

53 years of experience

Sales, Service & Rebuilding of Antique and Classic Car Components such as, Carburetors, Starters, Generators, Fuel Pumps, Double & Single Action Fuel Pump Rebuilding, Water Pumps, Hydraulic Top Pumps, Distributors, and DELCO Knee Action Shocks, We also carry a complete line of NOS and NORS parts. We offer FREE Technical advice for any YEAR Classic Car 609-462-7412

"Beware. They charged me double shipping even after I told them I would wait so I wouldn’t have to pay two shipping fees. The last item was a fuel pump that I had a problem with. I have made 4 calls to ask for help with no return call. Poor"

Frank H on July 2020

"Beware. They charged me double shipping even after I told them I would wait so I wouldn’t have to pay two shipping fees. The last item was a fuel pump that I had a problem with. I have made 4 calls to ask for help with no return call. Poor"

Frank H on July 2020

Generator Install questions, answered by experts

When maintained properly, a whole-house generator can last up to 20 years. Costs to maintain and repair generators vary by location and type of generator, but you can expect to pay about $150 to $300 per year for annual generator maintenance checks. An experienced generator service technician will inspect your generator’s engine filter, starting mechanism, fuel, lubrication, and coolant levels to keep your generator in good working condition for as long as possible.

The cost to install a whole-house generator averages at $5,200, but costs can range from $1,500 to $8,900, depending on the type and size of the generator, and the labor required to install it. To find the best deal while still ensuring the unit meets all the needs of your household, hire an electrician to calculate the electrical load of your must-have appliances and electronics beforehand so you don’t pay for more power than you need. As always, be sure to get at least three quotes to find the ideal fit for your needs and budget.

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.

No, you cannot plug a generator directly into a wall outlet in your home. Plugging in a generator without an interlocking kit, extension cord, or wall outlet receptacle is incredibly dangerous and can cause back-feeding—power from the generator back-feeds into utility lines. Also, if the main power comes back on while your generator is on, it could damage the generator and cause a house fire.

Yes, installing a generator usually increases your property value because buyers are getting the added peace of mind knowing they’ll be able to maintain power through blackouts. In most cases, you should see close to a 100% return on investment (ROI). Keep in mind that home generators usually need a permanent foundation, and installing a concrete slab will likely raise your property taxes slightly.

The Holmen, WI homeowners’ guide to generator installs

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