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There are 3 highly-rated local generator installers.

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Average homeowner rating star icon4.8
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Generator installers in North Haven

Avatar for Power Shield LLC
Power Shield LLC
5.00(
6
)
Approved Pro
Power Shield LLC
5.00(
6
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
42 local quotes requested

Power Shield LLC is locally owned and operated providing all types of general electrical services. We are a true One-Stop Electrical service! Give us a call or click for an estimate today!

"The installer was knowledgeable and prompt."

Harold B on April 2024

Power Shield LLC is locally owned and operated providing all types of general electrical services. We are a true One-Stop Electrical service! Give us a call or click for an estimate today!

"The installer was knowledgeable and prompt."

Harold B on April 2024


Avatar for MGT Electrical Services inc
MGT Electrical Services inc
5.00(
6
)
Approved Pro
MGT Electrical Services inc
5.00(
6
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
136 local quotes requested

We can take on a wide range of residential and commercial electrical projects to include full installation for additions and remodels as well as wiring/panel upgrades, and a variety of other projects. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

"It went very well. He said it would take about 5-6 hours, the job was done in three hours. Great comunication. Very happy with the work and outcome. They cleaned up very good when done. I will be calling them again to drop a few more line for me soon."

Richard N on August 2024

We can take on a wide range of residential and commercial electrical projects to include full installation for additions and remodels as well as wiring/panel upgrades, and a variety of other projects. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

"It went very well. He said it would take about 5-6 hours, the job was done in three hours. Great comunication. Very happy with the work and outcome. They cleaned up very good when done. I will be calling them again to drop a few more line for me soon."

Richard N on August 2024


Avatar for HARP Home Services LLC
HARP Home Services LLC
863 Marshall Phelps Rd
4.57(
444
)
Approved Pro
HARP Home Services LLC
863 Marshall Phelps Rd
4.57(
444
)
Approved Pro
Customers say: Super punctual
200 local quotes requested
33 years of experience

We joined Angie's List in August of 2007 and have earned their Super Service Award every year since 2009 when they started that program. HARP Home Services, LLC is here to take care of all your heating and air conditioning needs. Whether you are looking for a free quote on a new central air conditioning system or are ready to install radiant floor heating or a new boiler for those chilly winter months, we're just a phone call (or e-mail) away. Residential & Commercial.

"We had a furnace installed by Harp on July 8th 2024 after it being diagnosed by their technician as to the reason our ac system was not functioning properly. That’s when our troubles with Harp began. The installation was not done properly, we needed 3 service calls to get the ac to work properly. The installers were sloppy. We cleaned up screws and wire and parts from the old furnace for weeks. When heating season began we noticed that the humidifier installed with the furnace was not operating. We scheduled an appointment to have it repaired and they called the day of the appointment and told us they couldn’t come that day and we had to reschedule, so reluctantly we did. They finally came and repaired it. From what the technician told me it was not wired properly. On January 21st 2025( the coldest night of the year) the furnace stopped working. We called Harp to get someone to come to repair it as we had no heat in below 0º weather I was told the best they could do is to come the next day between 2 and 6 pm. I tried to explain that this was an emergency but to no avail. I called my local oil company and they were at my door within 30 minutes( which I would’ve expected from the company who sold us the furnace) the repaired it quickly and told us that one f the wires on the control panel was not attached properly. It cost me $300. I would NOT recommend Harp to anyone. They are not reliable and do not stand behind their promises of service 24/7. Stay as far away from this company as possible. We are sorry we ever started with them."

john j on January 2025

We joined Angie's List in August of 2007 and have earned their Super Service Award every year since 2009 when they started that program. HARP Home Services, LLC is here to take care of all your heating and air conditioning needs. Whether you are looking for a free quote on a new central air conditioning system or are ready to install radiant floor heating or a new boiler for those chilly winter months, we're just a phone call (or e-mail) away. Residential & Commercial.

"We had a furnace installed by Harp on July 8th 2024 after it being diagnosed by their technician as to the reason our ac system was not functioning properly. That’s when our troubles with Harp began. The installation was not done properly, we needed 3 service calls to get the ac to work properly. The installers were sloppy. We cleaned up screws and wire and parts from the old furnace for weeks. When heating season began we noticed that the humidifier installed with the furnace was not operating. We scheduled an appointment to have it repaired and they called the day of the appointment and told us they couldn’t come that day and we had to reschedule, so reluctantly we did. They finally came and repaired it. From what the technician told me it was not wired properly. On January 21st 2025( the coldest night of the year) the furnace stopped working. We called Harp to get someone to come to repair it as we had no heat in below 0º weather I was told the best they could do is to come the next day between 2 and 6 pm. I tried to explain that this was an emergency but to no avail. I called my local oil company and they were at my door within 30 minutes( which I would’ve expected from the company who sold us the furnace) the repaired it quickly and told us that one f the wires on the control panel was not attached properly. It cost me $300. I would NOT recommend Harp to anyone. They are not reliable and do not stand behind their promises of service 24/7. Stay as far away from this company as possible. We are sorry we ever started with them."

john j on January 2025


Candido Electric, LLC
144 Mary Ellen Drive
4.76(
34
)
Approved Pro
Candido Electric, LLC
144 Mary Ellen Drive
4.76(
34
)
Approved Pro
Customers say: Quality work
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
22 years of experience

Candido Electric, LLC, is Connecticut's premiere electrical contractor. They are licensed and insured with the state with over seven years of experience. Call today for all of your electrical needs.

"Terry was fantastic! He was very friendly and did a great job replacing recessed lights for us as well as installing keypad lock. I’ll definitely be using Candido Electric for any future electrical work needed."

Mark C on May 2023

Candido Electric, LLC, is Connecticut's premiere electrical contractor. They are licensed and insured with the state with over seven years of experience. Call today for all of your electrical needs.

"Terry was fantastic! He was very friendly and did a great job replacing recessed lights for us as well as installing keypad lock. I’ll definitely be using Candido Electric for any future electrical work needed."

Mark C on May 2023


Avatar for Handover Electric, LLC
Handover Electric, LLC
35 Newton St., Apt. 3
5.00(
1
)
Approved Pro
Handover Electric, LLC
35 Newton St., Apt. 3
5.00(
1
)
Approved Pro
Customers say: Quick response
25 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!

"Very knowledgeable and extremely professional"

reginald m on May 2022

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!

"Very knowledgeable and extremely professional"

reginald m on May 2022


Avatar for Extel Communications, Inc.
Extel Communications, Inc.
953 Tunxis Hill Road
4.96(
37
)
Approved Pro
Extel Communications, Inc.
953 Tunxis Hill Road
4.96(
37
)
Approved Pro
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
38 years of experience

We're a local family-owned and operated business started in 1987 with hundreds of satisfied customers throughout Connecticut and New York. We install and maintain hosted-cloud and on-premise telephone systems and provide service for your existing telephone system. Additionally, we offer telco & cable company network services, troubleshoot WiFi issues including installing wireless access points for WiFi connectivity, install data, fiber and voice cabling, security cameras and computer networks. Contact us today for a no charge, no obligation survey for all of your telecom and data needs!

"Immediate response. Expert, knowledgeable work. Excellent customer service. Very reasonable price. Would hire them again without question."

Brian M on December 2023

We're a local family-owned and operated business started in 1987 with hundreds of satisfied customers throughout Connecticut and New York. We install and maintain hosted-cloud and on-premise telephone systems and provide service for your existing telephone system. Additionally, we offer telco & cable company network services, troubleshoot WiFi issues including installing wireless access points for WiFi connectivity, install data, fiber and voice cabling, security cameras and computer networks. Contact us today for a no charge, no obligation survey for all of your telecom and data needs!

"Immediate response. Expert, knowledgeable work. Excellent customer service. Very reasonable price. Would hire them again without question."

Brian M on December 2023


Avatar for Viscuso & Son Electric, LLC
Viscuso & Son Electric, LLC
22 Old Pasture Lane
4.83(
121
)
Approved Pro
Viscuso & Son Electric, LLC
22 Old Pasture Lane
4.83(
121
)
Approved Pro
Customers say: True professional
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
45 years of experience

Welcome to Viscuso & Son Electric, LLC! We proudly provide the highest quality of service and craftsmanship for each aspect of your project. We eagerly look forward to working with you and making your vision a reality. Give us a call, text or email today, and let us get started!

"If I could give them 100 stars instead of the recommended 5 I would. Ralph was informative, extremely pleasant his work was outstanding!! Would absolutely use him again!! OK"

Margaret K on August 2024

Welcome to Viscuso & Son Electric, LLC! We proudly provide the highest quality of service and craftsmanship for each aspect of your project. We eagerly look forward to working with you and making your vision a reality. Give us a call, text or email today, and let us get started!

"If I could give them 100 stars instead of the recommended 5 I would. Ralph was informative, extremely pleasant his work was outstanding!! Would absolutely use him again!! OK"

Margaret K on August 2024


Avatar for West Electric, LLC
West Electric, LLC
49 Cherry Street
4.88(
45
)
Approved Pro
West Electric, LLC
49 Cherry Street
4.88(
45
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
64 local quotes requested

With 40 plus years of experience at West Electric, LLC, our work and customer service far exceeds our competition. We make sure that any concerns that the customer has are addressed quickly and correctly. We treat them the way we would expect to be treated as well. Your Home Electrictrification Specialists, providing you with commetive pricing for your EV, SOLAR, AND BATTERY STORAGE needs.

"I am glad i hired them to do my fuse box to circuit breaker c0nversion. They\ dad and son team were professional. They were right on regarding my breaker location. It cannot be installed in thr boiler/furnace room because the clearance is not big enough. Another electrician said i could install it the boiler room. He was completely wrong. I am glad i went with West Electric. Otherwise the inspector would have fail the indpection if i had gone with the other electrician. My new circuit breaker box was conveniently located on the wall outside our bedroom and outside the boiler/furnace room. In addition they create a beautifully wooden frame where the circuit breaker box. The father and son team were polite, pleasant to work with. I would hure them the next time i need electical work done. This review is several years late."

Anthony T on May 2016

With 40 plus years of experience at West Electric, LLC, our work and customer service far exceeds our competition. We make sure that any concerns that the customer has are addressed quickly and correctly. We treat them the way we would expect to be treated as well. Your Home Electrictrification Specialists, providing you with commetive pricing for your EV, SOLAR, AND BATTERY STORAGE needs.

"I am glad i hired them to do my fuse box to circuit breaker c0nversion. They\ dad and son team were professional. They were right on regarding my breaker location. It cannot be installed in thr boiler/furnace room because the clearance is not big enough. Another electrician said i could install it the boiler room. He was completely wrong. I am glad i went with West Electric. Otherwise the inspector would have fail the indpection if i had gone with the other electrician. My new circuit breaker box was conveniently located on the wall outside our bedroom and outside the boiler/furnace room. In addition they create a beautifully wooden frame where the circuit breaker box. The father and son team were polite, pleasant to work with. I would hure them the next time i need electical work done. This review is several years late."

Anthony T on May 2016


Avatar for A & A Electrical Contractors, LLC
A & A Electrical Contractors, LLC
125 Crown Street Ext
4.98(
27
)
Approved Pro
A & A Electrical Contractors, LLC
125 Crown Street Ext
4.98(
27
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
17 local quotes requested

At A & A Electrical Contractors, LLC, 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.

"Alberto was friendly, thoroughly professional and very punctual! Really made sure that everything is installed and in a working state then cleaned up. At a competitive rate, highly recommend!"

Phani B on February 2025

At A & A Electrical Contractors, LLC, 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.

"Alberto was friendly, thoroughly professional and very punctual! Really made sure that everything is installed and in a working state then cleaned up. At a competitive rate, highly recommend!"

Phani B on February 2025


Avatar for Cassella Electric
Cassella Electric
45 West Meadow Road
4.93(
104
)
Approved Pro
Cassella Electric
45 West Meadow Road
4.93(
104
)
Approved Pro
Customers say: True professional
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
21 local quotes requested

Cassella Electric - Serving all of your electrical installation and in-home repairs. Starting in the electrical trade in 1998 and opening own business in 2005. Our focus is to respect your home as if it was our own. Cassella Electric specializes in all residential installations and light commercial work. No job too small to call about.

"Rob is the best!! He was responsive and timely. His work is so perfect and neat, you’ll love him. He’s very easy to communicate with by text. I will use him for all my future needs. I highly recommend him. I’m so happy with his work and you will be to."

Lisa S on May 2025

Cassella Electric - Serving all of your electrical installation and in-home repairs. Starting in the electrical trade in 1998 and opening own business in 2005. Our focus is to respect your home as if it was our own. Cassella Electric specializes in all residential installations and light commercial work. No job too small to call about.

"Rob is the best!! He was responsive and timely. His work is so perfect and neat, you’ll love him. He’s very easy to communicate with by text. I will use him for all my future needs. I highly recommend him. I’m so happy with his work and you will be to."

Lisa S on May 2025

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FAQs for generator installation projects in North Haven, CT

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 North Haven, CT 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
May 22, 2025
May 22, 2025
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
Apr 1, 2025
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.
A view of a house at night
May 22, 2025
May 22, 2025
Whole home generator installations require a professional hand. Read this guide to help you decide which generator is best for your home.
A house generator in the backyard of a house
Apr 1, 2025
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
Apr 1, 2025
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
Apr 4, 2025
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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