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TRUSTED BY HOMEOWNERS

Average homeowner rating star icon4.5
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Verified reviews icon13
Verified generator installations reviews

Generator installers in Hempstead

Avatar for P&S Electrical Contractors LLC
P&S Electrical Contractors LLC
64 Alvord Ln
5.00(
2
)
Approved Pro
P&S Electrical Contractors LLC
64 Alvord Ln
5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
80 local quotes requested

With over 25 years of residential and commercial electrical experience, as well as PV Solar experience, P&S Electrical Contractors LLC is one of the elite electrical firms in the state of Connecticut. Founded by a father and son (and now a grandson), in Stamford in 2004, P&S has become a trusted company by thousands of customers, whether for an electrical outlet, or a solar system on your roof. ​ Our mission and commitment is to provide our customers with the most transparent experience, while going above and beyond expectations to achieve 100% customer satisfaction. ​ We are proud to serve Fairfield and Westchester County and beyond, and we look forward to serving you in the near future.

"P&S Electrical did a great job with a few projects at my home and office. They also answered all of my questions both before and after they completed the work. Very professional all around. I definitely recommend them for any electrical work you may need!"

Silvia P on April 2025

With over 25 years of residential and commercial electrical experience, as well as PV Solar experience, P&S Electrical Contractors LLC is one of the elite electrical firms in the state of Connecticut. Founded by a father and son (and now a grandson), in Stamford in 2004, P&S has become a trusted company by thousands of customers, whether for an electrical outlet, or a solar system on your roof. ​ Our mission and commitment is to provide our customers with the most transparent experience, while going above and beyond expectations to achieve 100% customer satisfaction. ​ We are proud to serve Fairfield and Westchester County and beyond, and we look forward to serving you in the near future.

"P&S Electrical did a great job with a few projects at my home and office. They also answered all of my questions both before and after they completed the work. Very professional all around. I definitely recommend them for any electrical work you may need!"

Silvia P on April 2025


Ryder Electric
810 Deer Park Rd
5.00(
2
)
Approved Pro
Ryder Electric
810 Deer Park Rd
5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
49 local quotes requested

Our team of Electricians is skilled, professional, and conscientious with years of experience dealing with the unforeseeable circumstances the commercial and residential Industries present. In addition, we partner with teams of architects, engineers, contractors, manufacturers and suppliers to further, strengthen our foundation in the industry. Each new customer that we work with is welcomed with a lifelong commitment to brighten their lives along the way. We care about what we do and it shows!

"It went very well. Derick was prompted, knowledgeable, and friendly."

Felix V on August 2024

Our team of Electricians is skilled, professional, and conscientious with years of experience dealing with the unforeseeable circumstances the commercial and residential Industries present. In addition, we partner with teams of architects, engineers, contractors, manufacturers and suppliers to further, strengthen our foundation in the industry. Each new customer that we work with is welcomed with a lifelong commitment to brighten their lives along the way. We care about what we do and it shows!

"It went very well. Derick was prompted, knowledgeable, and friendly."

Felix V on August 2024


Avatar for Duffy Electric
Duffy Electric
2200 Bellmore Avenue
4.38(
42
)
Approved Pro
Duffy Electric
2200 Bellmore Avenue
4.38(
42
)
Approved Pro
Customers say: Quality work
146 local quotes requested
18 years of experience

We're a family owned & operated electrical services company specializing in residential jobs in the Five Boroughs, Nassau & Suffolk Counties. At Duffy Electric, we’re dedicated to illuminating lives and empowering businesses with top-tier electrical solutions with over a decade of experience. Based in Nassau & Suffolk Counties and extending our expertise across the coast. We specialize in a wide range of electrical services tailored to meet the unique needs of our community. Our Mission: To provide reliable, efficient, and innovative electrical services that ensure safety, enhance convenience, and support the growth of local homes and businesses. Our Services: Residential Electrical Installations: From new construction wiring to smart home upgrades, our certified electricians bring light and comfort to your living space. Commercial Electrical Solutions: We power your business success with custom electrical designs, energy-efficient lighting, and preventive maintenance programs. Why Choose Duffy Electric? Local Expertise: As residents of Nassau & Suffolk Counties, we have a personal stake in the well-being of our neighborhoods and the success of local enterprises. Quality Craftsmanship: Our work reflects our commitment to excellence, with every project completed to the highest industry standards. Customer-Centric Approach: We listen, we understand, and we deliver electrical services that align with your vision and requirements. Safety & Sustainability: Safety is our top priority. We adhere to strict safety protocols and stay abreast of the latest eco-friendly practices to promote a sustainable future. Get Connected: Ready to experience the Duffy Electric difference? Contact us for a consultation and let’s energize your electrical projects!

"Very professional! Would definitely hire again. Highly recommended!!!"

Adriana C on November 2024

We're a family owned & operated electrical services company specializing in residential jobs in the Five Boroughs, Nassau & Suffolk Counties. At Duffy Electric, we’re dedicated to illuminating lives and empowering businesses with top-tier electrical solutions with over a decade of experience. Based in Nassau & Suffolk Counties and extending our expertise across the coast. We specialize in a wide range of electrical services tailored to meet the unique needs of our community. Our Mission: To provide reliable, efficient, and innovative electrical services that ensure safety, enhance convenience, and support the growth of local homes and businesses. Our Services: Residential Electrical Installations: From new construction wiring to smart home upgrades, our certified electricians bring light and comfort to your living space. Commercial Electrical Solutions: We power your business success with custom electrical designs, energy-efficient lighting, and preventive maintenance programs. Why Choose Duffy Electric? Local Expertise: As residents of Nassau & Suffolk Counties, we have a personal stake in the well-being of our neighborhoods and the success of local enterprises. Quality Craftsmanship: Our work reflects our commitment to excellence, with every project completed to the highest industry standards. Customer-Centric Approach: We listen, we understand, and we deliver electrical services that align with your vision and requirements. Safety & Sustainability: Safety is our top priority. We adhere to strict safety protocols and stay abreast of the latest eco-friendly practices to promote a sustainable future. Get Connected: Ready to experience the Duffy Electric difference? Contact us for a consultation and let’s energize your electrical projects!

"Very professional! Would definitely hire again. Highly recommended!!!"

Adriana C on November 2024


Home improvement services

"Provided excellent service and very reliable."

Stephany G on February 2025


Avatar for Crossland Management & Electric Inc
Crossland Management & Electric Inc
18-71 42nd St
4.80(
15
)
Approved Pro
Crossland Management & Electric Inc
18-71 42nd St
4.80(
15
)
Approved Pro
Customers say: Quick response
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
97 local quotes requested

Crossland Management & Electric, Inc. is your go-to electrical contractor for your home renovations or home remodeling. Our teams are trained and skilled for all your electrical and low-voltage needs. Don't hesitate to ask us a question or inquire as to why a certain process has to take place. Everyone on staff is friendly and knowledgeable because we know what it's like to be in your shoes. We want you to know just how special you and your project are to us, so we do our very best to ensure that you and your needs always come first. We even have a complimentary estimate where we'll come out to you!

"Initially, he responded within the hour when I posted my request then he came to the house. From there on, in terms of your appointments, there was a back and forth. I was very determined to encourage him. But he had me waited for an hour and it was disrespectful for me. I thanked him when the appointment is kept being cancelled to contact the electric company. He wanted me to do it, he finally did it and then they rescheduled. But now, from this point on where is additional work, that their company wishes the company is requiring. I cannot get the information, the specific information as to what is needed.. And this is now going on over two weeks, everything is a standstill. He is not responding and writing in a text. My interest is just to get the job completed."

Debbie D on September 2023

Crossland Management & Electric, Inc. is your go-to electrical contractor for your home renovations or home remodeling. Our teams are trained and skilled for all your electrical and low-voltage needs. Don't hesitate to ask us a question or inquire as to why a certain process has to take place. Everyone on staff is friendly and knowledgeable because we know what it's like to be in your shoes. We want you to know just how special you and your project are to us, so we do our very best to ensure that you and your needs always come first. We even have a complimentary estimate where we'll come out to you!

"Initially, he responded within the hour when I posted my request then he came to the house. From there on, in terms of your appointments, there was a back and forth. I was very determined to encourage him. But he had me waited for an hour and it was disrespectful for me. I thanked him when the appointment is kept being cancelled to contact the electric company. He wanted me to do it, he finally did it and then they rescheduled. But now, from this point on where is additional work, that their company wishes the company is requiring. I cannot get the information, the specific information as to what is needed.. And this is now going on over two weeks, everything is a standstill. He is not responding and writing in a text. My interest is just to get the job completed."

Debbie D on September 2023


Avatar for Universe Home Services
Universe Home Services
3782 Merrick Rd
4.54(
443
)
Approved Pro
Universe Home Services
3782 Merrick Rd
4.54(
443
)
Approved Pro
Customers say: Super punctual
424 local quotes requested
71 years of experience

Since 1954, Universe Home Services has been proudly serving the Nassau County community and customers throughout the entire region. With Universe Home Services, one call solves it all! Their highly trained technicians offer everything from heating and air conditioning to plumbing to appliance repair and electrical services on Long Island and beyond. Whether you’re dealing with an inefficient heating system, a noisy air conditioner, clogged toilet, broken dishwasher, or outdated electrical service panel, you can get the fast, affordable service you need with Universe Home Services. They go above and beyond to ensure that you’re completely satisfied with the quality of their work, offering service guarantees and parts and labor guarantees on new HVAC installations. As a family owned and operated company, Universe Home Services believes in top-quality customer service. They always treat you and your property with respect, working quickly, cleanly, and efficiently to minimize your inconvenience and leave your home in pristine condition. With more than 60 years of experience under their belt, and a commitment to unmatched quality, honesty, and expertise, Universe Home Services is the trusted name for heating, air conditioning, electrical, plumbing, and appliance repair on Long Island and beyond! Call today!

"Another terrific team just left my home after summer a/c service at our home Always respectful and on time Answered all my questions and will advise us on contractor for vent cleaning Glad we use this terrific company"

John B on April 2025

Since 1954, Universe Home Services has been proudly serving the Nassau County community and customers throughout the entire region. With Universe Home Services, one call solves it all! Their highly trained technicians offer everything from heating and air conditioning to plumbing to appliance repair and electrical services on Long Island and beyond. Whether you’re dealing with an inefficient heating system, a noisy air conditioner, clogged toilet, broken dishwasher, or outdated electrical service panel, you can get the fast, affordable service you need with Universe Home Services. They go above and beyond to ensure that you’re completely satisfied with the quality of their work, offering service guarantees and parts and labor guarantees on new HVAC installations. As a family owned and operated company, Universe Home Services believes in top-quality customer service. They always treat you and your property with respect, working quickly, cleanly, and efficiently to minimize your inconvenience and leave your home in pristine condition. With more than 60 years of experience under their belt, and a commitment to unmatched quality, honesty, and expertise, Universe Home Services is the trusted name for heating, air conditioning, electrical, plumbing, and appliance repair on Long Island and beyond! Call today!

"Another terrific team just left my home after summer a/c service at our home Always respectful and on time Answered all my questions and will advise us on contractor for vent cleaning Glad we use this terrific company"

John B on April 2025


Avatar for GT Dynamics Electric Inc
GT Dynamics Electric Inc
67 West Street
4.87(
31
)
Approved Pro
GT Dynamics Electric Inc
67 West Street
4.87(
31
)
Approved Pro
Customers say: Super punctual
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
151 local quotes requested

GT Dynamics Electric Inc. is a New York City licensed and insured company that provides prompt, precise, and efficient electrical installation services. We specialize in residential, commercial, and industrial electrical work. Our team of experienced electricians is dedicated to meeting the needs of our customers. Ranging from an outlet to any size service, troubleshooting an existing electrical problem to name a few.

"Great and professional. Very clean and neat . All the lights , switches are working perfectly well. He is a great master electrician . He works with you . Very reasonable price"

Macdonald e on November 2024

GT Dynamics Electric Inc. is a New York City licensed and insured company that provides prompt, precise, and efficient electrical installation services. We specialize in residential, commercial, and industrial electrical work. Our team of experienced electricians is dedicated to meeting the needs of our customers. Ranging from an outlet to any size service, troubleshooting an existing electrical problem to name a few.

"Great and professional. Very clean and neat . All the lights , switches are working perfectly well. He is a great master electrician . He works with you . Very reasonable price"

Macdonald e on November 2024


Avatar for Newgrange Electric Inc.
Newgrange Electric Inc.
111F Roosevelt Ave
4.64(
69
)
Approved Pro
Newgrange Electric Inc.
111F Roosevelt Ave
4.64(
69
)
Approved Pro
Customers say: Super punctual
33 local quotes requested
17 years of experience

Owned & operated by Edward Byrne. Centrally located in NYC, we serve all of Long Island, the five boroughs (NYC, Brooklyn, Queens, Bronx and Staten Island) and Westchester. We offer 24-hour emergency service, free estimates, quick response times, reasonable rates on service calls and competitive pricing on larger jobs.

"Very well! The team was very knowledgeable and installed the system in a few days. It has been working fine without trouble. Saves a lot of money. Crew was neat and cleaned up every day. Would definitely recommend them."

michael b on July 2019

Owned & operated by Edward Byrne. Centrally located in NYC, we serve all of Long Island, the five boroughs (NYC, Brooklyn, Queens, Bronx and Staten Island) and Westchester. We offer 24-hour emergency service, free estimates, quick response times, reasonable rates on service calls and competitive pricing on larger jobs.

"Very well! The team was very knowledgeable and installed the system in a few days. It has been working fine without trouble. Saves a lot of money. Crew was neat and cleaned up every day. Would definitely recommend them."

michael b on July 2019


Avatar for BQ Electric Inc
BQ Electric Inc
21 Holman Boulevard
4.90(
392
)
Approved Pro
BQ Electric Inc
21 Holman Boulevard
4.90(
392
)
Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
56 local quotes requested

** '13, '14, '15, '16, '17 & '18 SUPER SERVICE AWARD WINNER **. Named "Service Provider of the Year" by Angie's List, 2013. Welcome to "Long Island's most respected leader in electrical home improvements". Our team takes pride in our 110% customer satisfaction guarantee. We feel the best compliment you can get as a company is a recommendation to a satisfied customer's friend or family member. All our jobs start off with a written estimate and a visit to your home/job to review the details. We understand that your time is very valuable so all our appointments are confirmed the night before and again 15 minutes prior to our arrival. All of our work and material is warranted for 1 year. Give us the opportunity to impress you, and we won't let you down! So, please call us today and set up a free estimate for your next project.

"Was not a big job, but the work was done efficiently and staff was knowledgeable and responded to all questions. I would definitely call them in future."

Edward C on February 2023

** '13, '14, '15, '16, '17 & '18 SUPER SERVICE AWARD WINNER **. Named "Service Provider of the Year" by Angie's List, 2013. Welcome to "Long Island's most respected leader in electrical home improvements". Our team takes pride in our 110% customer satisfaction guarantee. We feel the best compliment you can get as a company is a recommendation to a satisfied customer's friend or family member. All our jobs start off with a written estimate and a visit to your home/job to review the details. We understand that your time is very valuable so all our appointments are confirmed the night before and again 15 minutes prior to our arrival. All of our work and material is warranted for 1 year. Give us the opportunity to impress you, and we won't let you down! So, please call us today and set up a free estimate for your next project.

"Was not a big job, but the work was done efficiently and staff was knowledgeable and responded to all questions. I would definitely call them in future."

Edward C on February 2023


Avatar for Dave Electrical
Dave Electrical
Dave Electrical
4.91(
34
)
Approved Pro
Dave Electrical
Dave Electrical
4.91(
34
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
42 local quotes requested

Hey I am David the owner of Dave’s Electric LLC. Certify electrical technician specialize in all electrical work residential etc! I pride myself on the quality work I provide, while delivering great customer service. Check out the services offered below and call -or- click to schedule an estimate today!

"Dave came to my home today to install a new spot light in my backyard and to fix a broken ceiling outlet in my home I want to add he also bought the new spotlight for me Dave is very friendly performed the electrical work in a timely fashion and I am thrilled with the new spotlight today was a pleasure for me I would highly recommend great work"

Norma A on December 2023

Hey I am David the owner of Dave’s Electric LLC. Certify electrical technician specialize in all electrical work residential etc! I pride myself on the quality work I provide, while delivering great customer service. Check out the services offered below and call -or- click to schedule an estimate today!

"Dave came to my home today to install a new spot light in my backyard and to fix a broken ceiling outlet in my home I want to add he also bought the new spotlight for me Dave is very friendly performed the electrical work in a timely fashion and I am thrilled with the new spotlight today was a pleasure for me I would highly recommend great work"

Norma A on December 2023

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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
Mar 3, 2025
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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
Apr 1, 2025
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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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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
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Apr 1, 2025
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.