How do I know what size generator I need?

• <div><p>When <a href="https://www.angi.com/articles/what-size-generator-do-i-need.htm">choosing the right size generator</a> for your needs, consider a few items to help calculate the wattage you’ll need. Start by determining which household items and appliances you want to power, and then add the wattages together. Check out the wattage of these essential appliances:</p><ul><li><p>Refrigerator: 600 watts</p></li><li><p>Large dehumidifier: 700 watts</p></li><li><p>Large window air conditioner: 1,400 watts</p></li><li><p>Water heater: 3,000 watts</p></li></ul><p>Running home appliances like these requires a partial or whole-house generator. A portable generator may be enough to power your home if you only plan to keep a refrigerator and freezer running. </p></div>

Are there tax credits for home generators?

• <div><p>In most cases, there are no tax credits available for home generators. However, that’s a general statement that applies to federal tax credits, so you might have access to state or local tax incentives. You can check the <a href="https://www.dsireusa.org">Database of State Incentives for Renewables & Efficiency (DSIRE)</a> for more information about your area. If you hire a reliable home generator installer, they should also know if there are any state or local perks you can use to reduce your installation costs, including tax breaks and rebates.</p></div>

Get matched with top generator install pros in Captain Cook, HI

Q: Can I install a portable generator myself?

• <div><p>DIY is possible for basic setups. Professional installation ensures safe and proper electrical connections.</p></div>

Q: Is a home generator a tax write-off?

• <div><p>Most homeowners won't be able to claim a home generator as a tax write-off. However, a whole-house generator may be tax-deductible in certain situations depending on its purpose. For instance, if it's needed to power essential medical equipment, it may qualify as a medical expense deduction. Also, in some cases, businesses can deduct a generator as a business expense if it supports operations. Always consult a tax professional to determine eligibility based on your specific circumstances and the applicable IRS regulations.</p></div>

Q: How much energy can I expect a home wind turbine to generate?

• <div><p>Energy output depends on turbine size, average wind speed at your site, and system efficiency. A 5 kW turbine in a good wind location can generate 8,000 to 12,000 kilowatt-hours per year, which may cover a large portion of an average home&rsquo;s needs. Accurate output estimates require a professional wind assessment and a review of your household&rsquo;s energy usage patterns.</p></div>

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Verified Reviews for Generator Install pros in Captain Cook, HI

*The Angi rating for Generator Install companies in Captain Cook, 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 Captain Cook, 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 29, 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 Captain Cook

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

DIY is possible for basic setups. Professional installation ensures safe and proper electrical connections.

Most homeowners won't be able to claim a home generator as a tax write-off. However, a whole-house generator may be tax-deductible in certain situations depending on its purpose. For instance, if it's needed to power essential medical equipment, it may qualify as a medical expense deduction. Also, in some cases, businesses can deduct a generator as a business expense if it supports operations. Always consult a tax professional to determine eligibility based on your specific circumstances and the applicable IRS regulations.

When choosing the right size generator for your needs, consider a few items to help calculate the wattage you’ll need. Start by determining which household items and appliances you want to power, and then add the wattages together. Check out the wattage of these essential appliances:

Refrigerator: 600 watts
Large dehumidifier: 700 watts
Large window air conditioner: 1,400 watts
Water heater: 3,000 watts

Running home appliances like these requires a partial or whole-house generator. A portable generator may be enough to power your home if you only plan to keep a refrigerator and freezer running.

In most cases, there are no tax credits available for home generators. However, that’s a general statement that applies to federal tax credits, so you might have access to state or local tax incentives. You can check the Database of State Incentives for Renewables & Efficiency (DSIRE) for more information about your area. If you hire a reliable home generator installer, they should also know if there are any state or local perks you can use to reduce your installation costs, including tax breaks and rebates.

Energy output depends on turbine size, average wind speed at your site, and system efficiency. A 5 kW turbine in a good wind location can generate 8,000 to 12,000 kilowatt-hours per year, which may cover a large portion of an average home’s needs. Accurate output estimates require a professional wind assessment and a review of your household’s energy usage patterns.

The Captain Cook, HI homeowners’ guide to generator installs

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