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 Waikoloa, HI

Q: Is a natural gas generator less expensive than using electricity?

• <div><p>Natural gas and electricity rates vary significantly based on location, and pricing can change over time, too. It&rsquo;s possible that in locations where natural gas is particularly inexpensive, it will cost less than grid-based electricity will. However, you should also factor in the generator&rsquo;s initial costs and maintenance needs, as well as its noise level and if it can comfortably power all your home appliances.</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: Where can you install a whole-house generator?

• <div><p>Whole-house generators need to be installed on level ground several feet away from walls and other objects. Because they tap into the electrical system directly, they usually need to be close to your home electrical panel for a transfer switch installation. It also helps with installation if they are near to a gas line or propane tank installation.</p></div>

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: 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 Waikoloa, HI

*The Angi rating for Generator Install companies in Waikoloa, HI 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 Waikoloa, HI 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 31, 2025

Reviewed in December 2023
They were here the next day to install an electrical line!
Hinokawa Electric, LLC
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Reviewed in September 2023
John is absolutely fantastic. Have used him multiple times for a variety of small projects. He is responsive, communicative, incredibly helpful and just generally a fantastically kind person. Would absolutely recommend for any and all needs.
John Tatus
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Reviewed in May 2023
Oni & 3 of her gals did a whole house deep clean for the first time today. Four hours total onsite work time. Zoned effort floor-to-floor allowed for inspection & fixes. Gals didn't replace furniture where it was originally, but at least it was moved! Generally pleased with results.
Ony'x Cleaning Service
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Reviewed in January 2019
Jake is very knowledgeable Very nice installation
Ohana Cabling
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Reviewed in January 2015
Awful! Had this person (company) not been hired by my General and have the Electrical Permit in their name, I would have fired them early on.
HOME CONVENIENCE CTR
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Reviewed in October 2014
We have used them before so we are very confident. They cleaned up after themselves. They got everything done that we needed done. They did not leave a mess. It generally just went fairly smoothly. Everything is fine. The house is on the market and people say it shows well. It was harder getting...
CertaPro Painters of Eastside
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Reviewed in June 2014
The initial fruit arrangement was not satisfactory. I sent an email via the Edible Arrangements website, which was directed to store 1427 on Melrose Ave. The manager responded immediately, decisively, and generously. She apologized for the unsatisfactory product and explained that all local...
Edible Arrangements
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Reviewed in April 2014
They did a FABULOUS job!!! I work for a general contractor and I am familiar with the trades and they know what they are doing, I would highly recommend them for any job. I was very impressed!!!
Plumbing Strategies, Inc
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Reviewed in September 2013
Service writer was friendly but not smiling much but was generous. Mechanics did a speedy and amazing job and notified me personally.
HILO MAZDA SUBARU
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Reviewed in August 2013
Gene is a very nice and friendly person but he really let us down with the landscape. He failed to include my comments on the plan that was submitted to the association causing unnecessary delays and rework of rock walls. The rock walls were not in his scope but were on the plan. We rarely...
GENE T POWER & ASSOC
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Find Generator install pros in Waikoloa

Olsen Electric LLC

16-2122 Lehua Dr

5.00(

)

Olsen Electric LLC

16-2122 Lehua Dr

5.00(

)

Customers say: Quick response

Recommended by 100% of Angi customers

Olsen Electric: Reputable electrical services provider in Big Island, Hawaii. We specialize in residential, commercial, and solar installations. Services include installations, upgrades, wiring, lighting, troubleshooting, home automation, and emergency repairs. Customized solutions for offices, retail stores, and buildings. Solar services include panel design, installation, battery storage, monitoring, maintenance, and incentives. Experienced electricians prioritize safety, efficiency, and customer satisfaction. Contact us for reliable electrical and solar solutions in Big Island, Hawaii.

"great Kevin also installed my ring spotlight and helped me set it up - He also checked the solar panels and recommended a course of action to get them back online."

Donald A on August 2023

"great Kevin also installed my ring spotlight and helped me set it up - He also checked the solar panels and recommended a course of action to get them back online."

Donald A on August 2023

Ultimate electric LLC

12554 W. Bridger St., Suite 122

2.00(

)

Ultimate electric LLC

12554 W. Bridger St., Suite 122

2.00(

)

Customers say: Super punctual

22 years of experience

We focus on residential electrical service and are opened 24 hrs a day and 7 days a week

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

Natural gas and electricity rates vary significantly based on location, and pricing can change over time, too. It’s possible that in locations where natural gas is particularly inexpensive, it will cost less than grid-based electricity will. However, you should also factor in the generator’s initial costs and maintenance needs, as well as its noise level and if it can comfortably power all your home appliances.

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.

Whole-house generators need to be installed on level ground several feet away from walls and other objects. Because they tap into the electrical system directly, they usually need to be close to your home electrical panel for a transfer switch installation. It also helps with installation if they are near to a gas line or propane tank installation.

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

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 Waikoloa, HI 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

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.
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•
Oct 29, 2025Oct 29, 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.
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•
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How Much Does Whole-House Generator Maintenance Cost? [2025 Data]
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•
Mar 24, 2025Mar 24, 2025
Home Standby Generators vs. Battery Backup Systems: Which Is Right for Your Home?
Generators are a home essential when a power outage strikes. Compare home standby generators vs backup battery systems to find the best one for you.
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•
Jul 1, 2024Jul 1, 2024
What Size Generator Do I Need? A Guide to Choosing the Right Generator for Your Home
Emergency generators come in many types and sizes to suit various needs. If you’re wondering what size generator to buy, here’s what to consider.
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•
Aug 14, 2025Aug 14, 2025
How To Connect a Generator to Your House Without a Transfer Switch
Using a generator during a power outage is a lifesaver. Our guide will show you how to connect a generator to your house without a transfer switch.