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Generator installers in Bethpage

Avatar for Tri-State Water, Power & Air
Tri-State Water, Power & Air
808 Airpark Center Dr
5.00(
1
)
Approved Pro
Tri-State Water, Power & Air
808 Airpark Center Dr
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
168 local quotes requested

We are the experts in the field of Whole Home Generator Sales and Installation, with over 20 years of experience in the game. We provide turn-key installation by licensed professionals - 24 hour emergency service - Remote Monitoring - Long term maintenance and service by factory trained technicians.

"They got the job done and I am very pleased. Will use them in the future."

Cathy H on May 2024

We are the experts in the field of Whole Home Generator Sales and Installation, with over 20 years of experience in the game. We provide turn-key installation by licensed professionals - 24 hour emergency service - Remote Monitoring - Long term maintenance and service by factory trained technicians.

"They got the job done and I am very pleased. Will use them in the future."

Cathy H on May 2024


Avatar for Coolray Heating, Cooling, Plumbing & Electrical
Coolray Heating, Cooling, Plumbing & Electrical
1717-B Elm Hill Pike
4.00(
4
)
Approved Pro
Coolray Heating, Cooling, Plumbing & Electrical
1717-B Elm Hill Pike
4.00(
4
)
Approved Pro
Customers say: Quick response
124 local quotes requested
59 years of experience

Keeping your home running smoothly isn’t always easy—HVAC breakdowns, plumbing issues, and electrical problems never happen at a convenient time. That’s where we come in. Coolray Heating, Cooling, Plumbing & Electrical has been the trusted name in home services across the Southeast since 1966. Our team of skilled professionals is ready to tackle any issue with fast, dependable service—because we know your home is more than just a house; it’s where life happens. Whether it’s a last-minute repair or a routine maintenance check, we’re here to help. Call today or schedule an appointment online. Coolray – Keeping Tennessee cool, plumbing right, and lights bright.

"I heard about Coolray of Tennessee through Home Depot when I requested a quote off their website. The dispatch called me immediately, and she was able to set up an appointment the very next day. Everyone that I have encountered has displayed excellent customer service, and they installed my HVAC unit a couple of days later. I would like to thank Ted, Josh, and Alex especially for making my home warm again. I would recommend Coolray of Tennessee to anybody."

Christy S on January 2025

Keeping your home running smoothly isn’t always easy—HVAC breakdowns, plumbing issues, and electrical problems never happen at a convenient time. That’s where we come in. Coolray Heating, Cooling, Plumbing & Electrical has been the trusted name in home services across the Southeast since 1966. Our team of skilled professionals is ready to tackle any issue with fast, dependable service—because we know your home is more than just a house; it’s where life happens. Whether it’s a last-minute repair or a routine maintenance check, we’re here to help. Call today or schedule an appointment online. Coolray – Keeping Tennessee cool, plumbing right, and lights bright.

"I heard about Coolray of Tennessee through Home Depot when I requested a quote off their website. The dispatch called me immediately, and she was able to set up an appointment the very next day. Everyone that I have encountered has displayed excellent customer service, and they installed my HVAC unit a couple of days later. I would like to thank Ted, Josh, and Alex especially for making my home warm again. I would recommend Coolray of Tennessee to anybody."

Christy S on January 2025


Brentons Electrical Service
2116 Circle Dr
5.00(
3
)
Approved Pro
Brentons Electrical Service
2116 Circle Dr
5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
10 years of experience

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"Showed up on time, completed the complicated job with quality and was very friendly. Will be using again in the future!"

Christina L on October 2021

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"Showed up on time, completed the complicated job with quality and was very friendly. Will be using again in the future!"

Christina L on October 2021


Avatar for KLG LLC
KLG LLC
2655 8th Ave S
3.83(
7
)
Approved Pro
KLG LLC
2655 8th Ave S
3.83(
7
)
Approved Pro
Customers say: Quality work
5 years of experience
Free onsite estimate

We pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all of our projects no matter how big or small. We are experts in our trade and will always keep you educated on your particular task or project. We look forward to earning your business!

"BUYER BEWARE!!! I will update this review IF the generator I contracted for gets installed. Apparently, the LLC entity that previously operated as Generator Supercenter of Nashville is in some sort of financial difficulty, and the franchise operations have been taken back by the "national" franchisor. I contracted with the the company on 9/20/24 and was told that my generator would be installed by 11/1/24. The last week of October, I was told that my job was "with the state" for some sort of electrical permit (which makes no sense, but that is what I was told). Two weeks ago, when I called back, I was told a more complete story, but that they were waiting for "national" to issue a "certificate" for my job and all the other jobs that had been taken over from the franchisee. Last week, I was told that it will now be the week after Thanksgiving before my job can move forward. Again, I will update this review IF I get my generator., Thus far, color me very concerned."

Godon N on November 2024

We pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all of our projects no matter how big or small. We are experts in our trade and will always keep you educated on your particular task or project. We look forward to earning your business!

"BUYER BEWARE!!! I will update this review IF the generator I contracted for gets installed. Apparently, the LLC entity that previously operated as Generator Supercenter of Nashville is in some sort of financial difficulty, and the franchise operations have been taken back by the "national" franchisor. I contracted with the the company on 9/20/24 and was told that my generator would be installed by 11/1/24. The last week of October, I was told that my job was "with the state" for some sort of electrical permit (which makes no sense, but that is what I was told). Two weeks ago, when I called back, I was told a more complete story, but that they were waiting for "national" to issue a "certificate" for my job and all the other jobs that had been taken over from the franchisee. Last week, I was told that it will now be the week after Thanksgiving before my job can move forward. Again, I will update this review IF I get my generator., Thus far, color me very concerned."

Godon N on November 2024


Avatar for Power Pros LLC
Power Pros LLC
8204 Pleasant Hill Rd
4.94(
8
)
Approved Pro
Power Pros LLC
8204 Pleasant Hill Rd
4.94(
8
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
4 years of experience

Over 20 years experience! We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer’s needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"I highly recommend this company. Excellent customer service, showed up exactly when they said they would, finished when they said they would and the price was reasonable. I will definitely use them again in the future."

Janice E on November 2022

Over 20 years experience! We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer’s needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"I highly recommend this company. Excellent customer service, showed up exactly when they said they would, finished when they said they would and the price was reasonable. I will definitely use them again in the future."

Janice E on November 2022


Avatar for W B Lightning Rods
W B Lightning Rods
560 Peoples Plaza Unit 234
4.93(
297
)
Approved Pro
W B Lightning Rods
560 Peoples Plaza Unit 234
4.93(
297
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
117 local quotes requested

WB Lightning Rods is a third-generation lightning protection contractor. Family Owned and operated for over 60 years. installing U.L. Listed Lightning protection systems, All Over the East coast, Midwest south east and south west regions of the U.S. Installations on Residential Homes, Estate Properties, Agricultural and Equestrian Properties. Lightning Protection for trees is also available. No job to big or small References upon Request. Contact us today for a no cost or obligation estimate. We look forward to working with you on your Lightning Protection Project. Thank you. **WE ARE NOT ELECTRICIANS** **WE ONLY INSTALL LIGHTNING PROTECTION SYSTEMS **

"Great company, they were fast, friendly, & accommodating. I would definitely use them again."

Jennifer B on October 2024

WB Lightning Rods is a third-generation lightning protection contractor. Family Owned and operated for over 60 years. installing U.L. Listed Lightning protection systems, All Over the East coast, Midwest south east and south west regions of the U.S. Installations on Residential Homes, Estate Properties, Agricultural and Equestrian Properties. Lightning Protection for trees is also available. No job to big or small References upon Request. Contact us today for a no cost or obligation estimate. We look forward to working with you on your Lightning Protection Project. Thank you. **WE ARE NOT ELECTRICIANS** **WE ONLY INSTALL LIGHTNING PROTECTION SYSTEMS **

"Great company, they were fast, friendly, & accommodating. I would definitely use them again."

Jennifer B on October 2024


Avatar for Holt Diversified
Holt Diversified
115 Timber Trail
5.00(
1
)
Approved Pro
Holt Diversified
115 Timber Trail
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
4 years of experience

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"Kind, respectful, good customer service....take time to explain things and came back to resolve an issue with no trouble at all...."

Amy H on April 2024

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"Kind, respectful, good customer service....take time to explain things and came back to resolve an issue with no trouble at all...."

Amy H on April 2024


Avatar for Tri-State Water, Power & Air
Tri-State Water, Power & Air
808 Airpark Center Dr
4.85(
33
)
Approved Pro
Tri-State Water, Power & Air
808 Airpark Center Dr
4.85(
33
)
Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
44 local quotes requested

Tri-State Water, Power, & Air has earned the trust of homeowners by providing top-of-the-line home products & exceptional service. Our dedication to customer satisfaction has allowed us to not only expand our selection of home upgrades but also our footprint, as we?re now in several Midwestern states. Whether you're looking for a reliable company to handle a plumbing issue or install a standby generator, tankless water heater, or electric vehicle charging station, we can provide the ideal solution to fit your needs. Throughout the years, we have remained a family-owned company with an unwavering commitment to delivering customer satisfaction. We measure our success in the improvements we make to our customers? home lives. To ensure every homeowner who partners with us receives an outstanding value, we provide personalized solutions, premium products, & expert installations. And we top it off by delivering exceptional service before, during, & long after the project is completed.

"He was very professional. He was a very kind individual name was Barry Sullivan. He was excellent."

Kenneth B on November 2023

Tri-State Water, Power, & Air has earned the trust of homeowners by providing top-of-the-line home products & exceptional service. Our dedication to customer satisfaction has allowed us to not only expand our selection of home upgrades but also our footprint, as we?re now in several Midwestern states. Whether you're looking for a reliable company to handle a plumbing issue or install a standby generator, tankless water heater, or electric vehicle charging station, we can provide the ideal solution to fit your needs. Throughout the years, we have remained a family-owned company with an unwavering commitment to delivering customer satisfaction. We measure our success in the improvements we make to our customers? home lives. To ensure every homeowner who partners with us receives an outstanding value, we provide personalized solutions, premium products, & expert installations. And we top it off by delivering exceptional service before, during, & long after the project is completed.

"He was very professional. He was a very kind individual name was Barry Sullivan. He was excellent."

Kenneth B on November 2023


JTE SOLAR INC
220 Great Circle
No reviews
JTE SOLAR INC
220 Great Circle
No reviews
5 years of experience

We are one of few full in house Solar Sales, Instillation, and Solar Service company. We work diligently to provide a consumer friendly approach with streamlined processes. Locally owned and operated from Nashville, TN. We have built a strong reputation with inspectors and utility companies to make Going Solar as simple as possible for our customers. Because we are certified in many systems and styles we are able to custom tailor to each individual and unique need.

We are one of few full in house Solar Sales, Instillation, and Solar Service company. We work diligently to provide a consumer friendly approach with streamlined processes. Locally owned and operated from Nashville, TN. We have built a strong reputation with inspectors and utility companies to make Going Solar as simple as possible for our customers. Because we are certified in many systems and styles we are able to custom tailor to each individual and unique need.


Smith & Son General Maintenance
1301 Elliston St
5.00(
1
)
Smith & Son General Maintenance
1301 Elliston St
5.00(
1
)
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Growing up as a child in New Orleans, Louisiana, helping the community was a part of life. I’ve been in the construction industry for over 15 years and I love every part of it! Electrical work is my passion! I use to love wiring up hospitals and buildings with my uncle as a teenager, knowing one day I could have my own company! I would love to take care of all of your electrical needs! I offer fair prices, quality work, and honesty not often found these days. Give me a call for your free estimate!

"They've done a lot of work in the past and it's always a great job."

Hayse G on August 2020

Growing up as a child in New Orleans, Louisiana, helping the community was a part of life. I’ve been in the construction industry for over 15 years and I love every part of it! Electrical work is my passion! I use to love wiring up hospitals and buildings with my uncle as a teenager, knowing one day I could have my own company! I would love to take care of all of your electrical needs! I offer fair prices, quality work, and honesty not often found these days. Give me a call for your free estimate!

"They've done a lot of work in the past and it's always a great job."

Hayse G on August 2020

Showing 1-10 of 18

Generator installations FAQs

Installing a whole-house generator costs about $5,000 on average. Prices range from $1,550 to $8,500, depending on size, brand, fuel type, and assembly. The size of your whole-house generator is the most significant cost factor, with large homes with high energy demands costing the most to power. Types of whole-home generators include:

  • Portable generators with 1kW–7.5kW capacity: $500–$2,000

  • Partial generators with 9kW–20kW capacity: $2,000–$6,300

  • Whole-house generators with 22kW–48kW: $5,000–$18,000

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.

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. 

Here’s what you can run with different wattages and types of generators:

Portable generator:

  • 2,000 watts can handle a large appliance like a freezer or refrigerator, plus a few smaller items like phones or computer chargers. 

  • 4,000 watts will keep two large appliances operating and a few smaller devices.

  • 8,000 watts should power most essential appliances and other devices, including a sump pump, well pump, or your dishwasher.

Partial to whole-house generator:

  • 20,000 watts and above will make it seem like your home’s power is still on.

The value of installing a whole-house generator is that your home has guaranteed power, even if the power grid in your area is down. Whether a whole-house generator is worth installing in your home depends on how often you use it, your home’s location, and your lifestyle. For example, installing a whole-house generator is likely worth it if you:

  • Experience frequent or prolonged power outages

  • Work from home

  • Store a lot of cold food

  • Have a sump pump

  • Have a pump for well water

  • Use electronic medical devices

  • Live in a climate requiring heating or cooling

The homeowners guide to generator installations
From average costs to expert advice, get all the answers you need to get your job done.
A portable inverter generator
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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.
Boy and girl jumping on the couch sofa
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A whole house generator can keep your home running during a power outage, but can it handle the energy demands of an air conditioner? Here’s what to consider.
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Apr 1, 2025
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Natural gas generators emit carbon monoxide, a harmful gas. Learn about what carbon monoxide is and tips to operate your generator safely.
A house generator in the backyard of a house
Apr 1, 2025
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Is a whole-house generator worth it? Discover the key factors influencing ROI and whether it's the right choice for your home.
outdoor diesel power generator
Apr 1, 2025
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Diesel remains a popular fuel option for a variety of home generators, but you will need to plan your maintenance carefully. Here’s how it works.
emergency power supply outside home
Apr 4, 2025
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How much does it cost to run a standby generator? The answer varies based on the type and size of the generator. Find out more.
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