Get matched with top generator install pros in New Haven, WV

Q: What are the disadvantages of a standby generator?

• <div><p>While standby generators provide essential backup power, they can fail when you need them most due to lack of maintenance, fuel supply issues, dead batteries, electrical problems, or improper installation. To avoid costly failures, professional installation and regular maintenance are crucial. Licensed technicians ensure safety, uphold warranty requirements, comply with regulations, and provide expert servicing.</p></div>

Q: What size generator does my house need?

• <div><p>You can determine what size generator you need by listing the various appliances it will power during an outage. Write down the start-up watt usage, and then add them all together. </p><p>A 7,500-watt generator will run your refrigerator, freezer, well pump, and lighting circuits without a problem. However, you&rsquo;ll need an extra 3,000 to 4,500 watts to run your water heater and another 5,000 to 25,000 watts to run your electric furnace. In these instances, a whole-home generator is your best bet for running your critical equipment.</p></div>

Q: How do generator specifications and installation requirements impact the overall cost?

• <div><p>Costs depend on generator type, labor, and additional wiring or transfer switch requirements.</p></div>

Q: What is the life expectancy of a whole house generator?

• <div><p>Whole-house generators can last<b> 20 to 40 years</b> with normal operation and proper maintenance. If you look up the specifications for your generator, you may be able to find a lifespan rated in hours of operation. Life expectancy will vary depending on how often and for how long you use the generator each year. Choosing a fuel with low impact like natural gas or diesel can help generators last as long as possible.</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>

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Verified Reviews for Generator Install pros in New Haven, WV

*The Angi rating for Generator Install companies in New Haven, WV 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 New Haven, WV 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 October 26, 2025

Reviewed in August 2025
They did an excellent job removing our trees, grooming our yard, and then installing our fire pit.
MAC Group, LLC
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Reviewed in May 2023
Mr. Swanson at JP Water came out to test our water as we had concerns about the iron and other contaminents in our well water. Mr. Swanson was very knowledgable about water chemistry and explained to us in great detail the best treatment options. He was back within the same week installing the...
J.P. Water Solutions, LLC
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Reviewed in October 2015
Still waiting for them to return my call. I explained to the lady that other contractors have not returned my calls. She assured me I would get a call to schedule an estimate. In my opinion, Harrison Construction is as unreliable as any other general contractor I have dealt with.
HARRISON CONSTRUCTION INC
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Reviewed in October 2013
The job went very well. The installation was professional and jobsite cleanup was excellent. We've had no problems with the windows in the 17 years since they were installed. I believe the current owner's father was running the company when the work was done (since retired?) and we thought...
Bowser Construction LLC
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Reviewed in July 2013
Different crews of 2 did each door...they did a good job on the entry door except for putting shims under door to level it for closing and not doing any insulating around shims. Company owner came in early 2013 after I had gone to H.D. in search of caulking...there was quite a bit of cold air...
WV Restoration & Remodeling
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Reviewed in January 2013
My steps were starting to sink and the mortar around the porch was beginning to crumble. Moran's crew came in and fixed the problems and installed new handrails at the same time. The only problem that occurred was that the steps had sunk and proping them up made the whole sidewalk look strange...
Ram Jack West Virginia
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Reviewed in August 2012
The experience went as expected. They estimated 2 weeks to replace the flooring in the whole house and they did not disappoint. they cleaned up everyday as they finished and then when the work was done all I had to do was have the furniture that I had ordered moved in. All other furniture was...
LOWE'S
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Reviewed in November 2011
install was great intill i had problems a couple months later with my a/c sinking intot he ground,....they have horrible customer service from my expereience, everytime i called i ahd to reexplain my problem, they schedule and didnt show, finally came but told me i was going to have to pay...
Grogg's Home Services
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Find Generator install pros in New Haven

Big Bend Generators

34741 Long Hollow Rd

4.75(

)

Big Bend Generators

34741 Long Hollow Rd

4.75(

)

Customers say: Quick response

Recommended by 100% of Angi customers

Big Bend Generators sells all new. Briggs & Stratton and General Electric Home and Business automatic standby generator systems, all made in the USA. we do the ordering, deliver the system, installation done by my licensed, certified electrian sub contractor, after the sale we do all of the 24 - 7 warranty service includes weekends, holidays.

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

Al Marino Inc

1653 4th Ave

4.39(

)

Al Marino Inc

1653 4th Ave

4.39(

)

Customers say: Super punctual

73 years of experience

Owner operated. Financing available. See website for additional services offered. Since 1952 Al Marino Inc has been serving the Charleston, Huntington, Teays Valley, and Beckley WV communities with quality plumbing, heating, cooling, electrical, home improvement, and roofing services. Our drug-tested, background checked, fully trained technicians will provide FAST, Friendly service in hours. At Al Marino Inc we believe in fixing the problem and not treating the symptoms. We have the experience and know-how to get the job done quickly and professionally. We also offer 24/7 emergency service so you’ll be covered no matter when your emergency happens. As always, all of our services are 100% guaranteed. If you aren’t satisfied we will do it over for FREE. Call us today at 1-888-275-0300.

"We used this company to fix our water issues. Now we’ve got exposed piping and holes in ALL of our bedrooms. Would not recommend, however, our water is fixed so that’s something."

Jayla T on August 2023

"We used this company to fix our water issues. Now we’ve got exposed piping and holes in ALL of our bedrooms. Would not recommend, however, our water is fixed so that’s something."

Jayla T on August 2023

Generator Install questions, answered by experts

While standby generators provide essential backup power, they can fail when you need them most due to lack of maintenance, fuel supply issues, dead batteries, electrical problems, or improper installation. To avoid costly failures, professional installation and regular maintenance are crucial. Licensed technicians ensure safety, uphold warranty requirements, comply with regulations, and provide expert servicing.

You can determine what size generator you need by listing the various appliances it will power during an outage. Write down the start-up watt usage, and then add them all together.

A 7,500-watt generator will run your refrigerator, freezer, well pump, and lighting circuits without a problem. However, you’ll need an extra 3,000 to 4,500 watts to run your water heater and another 5,000 to 25,000 watts to run your electric furnace. In these instances, a whole-home generator is your best bet for running your critical equipment.

Costs depend on generator type, labor, and additional wiring or transfer switch requirements.

Whole-house generators can last 20 to 40 years with normal operation and proper maintenance. If you look up the specifications for your generator, you may be able to find a lifespan rated in hours of operation. Life expectancy will vary depending on how often and for how long you use the generator each year. Choosing a fuel with low impact like natural gas or diesel can help generators last as long as possible.

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 New Haven, WV 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
•
Feb 10, 2025Feb 10, 2025
How Much Does It Cost To Install a Generator Transfer Switch? [2025 Data]
The cost to install a generator transfer switch depends on several factors. Our guide will help you understand all of the costs.
Breyden Kellam
•
Aug 14, 2025Aug 14, 2025
How Much Does Whole-House Generator Maintenance Cost? [2025 Data]
Keeping on top of generator maintenance and repairs gives you extra peace of mind as a homeowner. Find out how much regular generator maintenance costs.
Elisa Greenberg
•
Aug 14, 2025Aug 14, 2025
How Much Does a Whole-House Generator Cost? [2025 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.
Heather Ayer
•
May 22, 2025May 22, 2025
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.
Tyler Lacoma
•
Mar 13, 2025Mar 13, 2025
Best Fuel For a Whole-House Generator: 5 Options
If you’re investing in a large power alternative for your home, it deserves the right fuel for your job. Here are the top options for a whole home generator.
Michelle Nati
•
Mar 28, 2025Mar 28, 2025
Generator vs. Inverter Generator: Which Should You Choose?
Traditional and inverter generators can provide off-grid or emergency power. Learn the pros and cons of a traditional generator vs. inverter generator.