Top-rated generator installers.

Get matched with top generator installers in Sewaren, NJ

There are 15 highly-rated local generator installers.

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Verified generator installations reviews

Generator installers in Sewaren

Avatar for Diamond Electrical Svcs
Diamond Electrical Svcs
34 Hardenburg Ln
4.97(
1,283
)
Approved Pro
Diamond Electrical Svcs
34 Hardenburg Ln
4.97(
1,283
)
Approved Pro
Customers say: Super punctual
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
204 local quotes requested

Deal directly with the owner/license holder: Master Electrician & NJ State Code Official Anthony J Agugliaro about all your electrical needs, not some salesman. NJ Master Electrician/Electrical Contractor Lic# 10048, NJ Electrical Code official/electrical inspector Lic# 8303 Please note that all requests for a price quote, or to schedule work must be submitted to My email [email protected] and must include your complete address and phone number.

"Tony was good and completed work satisfactorily!"

Nishant S on May 2025

Deal directly with the owner/license holder: Master Electrician & NJ State Code Official Anthony J Agugliaro about all your electrical needs, not some salesman. NJ Master Electrician/Electrical Contractor Lic# 10048, NJ Electrical Code official/electrical inspector Lic# 8303 Please note that all requests for a price quote, or to schedule work must be submitted to My email [email protected] and must include your complete address and phone number.

"Tony was good and completed work satisfactorily!"

Nishant S on May 2025


Avatar for Arctic Air Conditioning
Arctic Air Conditioning
1 Pleasant Valley Rd
4.84(
828
)
Approved Pro
Arctic Air Conditioning
1 Pleasant Valley Rd
4.84(
828
)
Approved Pro
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
658 local quotes requested

Arctic Air Conditioning is a family run business that has served New Jersey since 1977. We specialize in residential and commercial Air Conditioning, Heating, Humidification, and indoor air quality. Our other services include Plumbing, Electrical, and Garage Doors. Our philosophy is to provide top of the line equipment with the best installation and service available in the industry. We are an award winning Lennox Dealer and Home Depot Service Provider.

"Great!! Would hire again"

Erik A on May 2025

Arctic Air Conditioning is a family run business that has served New Jersey since 1977. We specialize in residential and commercial Air Conditioning, Heating, Humidification, and indoor air quality. Our other services include Plumbing, Electrical, and Garage Doors. Our philosophy is to provide top of the line equipment with the best installation and service available in the industry. We are an award winning Lennox Dealer and Home Depot Service Provider.

"Great!! Would hire again"

Erik A on May 2025


Avatar for Integrated Electrical Solutions, LLC
Integrated Electrical Solutions, LLC
100 Cedar Swamp Road
4.68(
41
)
Approved Pro
Integrated Electrical Solutions, LLC
100 Cedar Swamp Road
4.68(
41
)
Approved Pro
Customers say: Super punctual
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
744 local quotes requested

Welcome to our profile. Integrated Electrical Solutions is a full service electrical house. We do great work, at a fair price. Our pricing is very simple: we charge a $175 service fee, and $150 per hour for Lead Electricians, $115 per hour for Second Electricians, and $85 to $95 per hour for Helpers. , plus parts for electrical, drain work and appliances. We service all brands of portable and stand by generators. Work before 6 am as well as night after 6pm, weekends and holidays is subject to additional charges. We normally charge $125 to clean dryer vents and that's it. We provide outstanding, well equipped mechanics, who know their jobs. YOU GET WHAT YOU PAY FOR- TOP SHELF FIVE START SERVICE. Integrated Electrical Solutions is a fully licensed and fully insured electrical company. We do emergency work 24/7, 365. When you want the best and you want it done right the first time, call us. thank you!

"The experience was not quite what I expected. I had clearly explained the scope—replacing 10-12 standard switches with smart switches giving model number/spec—and was hoping for a lump sum proposal, but they only offered hourly rates, which is understandable. They estimated it would take about 2 hours, but the job ended up taking over 4. While they mentioned having done similar installations before, they spent quite a bit of time reviewing instructions on site, which added to the time and cost. The final bill was over $800 for a couple switches, including a service fee and $10 for wire connector? (The switches come with connector) Just a heads-up to others: be sure to ask detailed questions about hourly charges and how time will be managed, especially for smart device installations."

Kyle C on May 2025

Welcome to our profile. Integrated Electrical Solutions is a full service electrical house. We do great work, at a fair price. Our pricing is very simple: we charge a $175 service fee, and $150 per hour for Lead Electricians, $115 per hour for Second Electricians, and $85 to $95 per hour for Helpers. , plus parts for electrical, drain work and appliances. We service all brands of portable and stand by generators. Work before 6 am as well as night after 6pm, weekends and holidays is subject to additional charges. We normally charge $125 to clean dryer vents and that's it. We provide outstanding, well equipped mechanics, who know their jobs. YOU GET WHAT YOU PAY FOR- TOP SHELF FIVE START SERVICE. Integrated Electrical Solutions is a fully licensed and fully insured electrical company. We do emergency work 24/7, 365. When you want the best and you want it done right the first time, call us. thank you!

"The experience was not quite what I expected. I had clearly explained the scope—replacing 10-12 standard switches with smart switches giving model number/spec—and was hoping for a lump sum proposal, but they only offered hourly rates, which is understandable. They estimated it would take about 2 hours, but the job ended up taking over 4. While they mentioned having done similar installations before, they spent quite a bit of time reviewing instructions on site, which added to the time and cost. The final bill was over $800 for a couple switches, including a service fee and $10 for wire connector? (The switches come with connector) Just a heads-up to others: be sure to ask detailed questions about hourly charges and how time will be managed, especially for smart device installations."

Kyle C on May 2025


Avatar for Juice Electrical Contracting
Juice Electrical Contracting
4295 Arthur Kill Rd
5.00(
12
)
Approved Pro
Juice Electrical Contracting
4295 Arthur Kill Rd
5.00(
12
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
59 local quotes requested

Juice Electrical Contracting specializes in residential and commercial services. Whether you need a small wiring fix or the installation of state-of-the-art electrical equipment, we get the job done right for your residential and commercial projects. We provide a thorough consultation to explain your available options. With that information, you can choose the scope of work that’s right for your home or business and for your budget.

"I cannot say enough fantastic things about Juice Electrical. Not only was the work done beautifully but Matt and John were excellent communicators. I was away for the project but it didn’t matter as I felt I knew what was happening and when. Professional, timely and emphasis on safety. Could not be happier and heartily recommend them."

Gus K on May 2024

Juice Electrical Contracting specializes in residential and commercial services. Whether you need a small wiring fix or the installation of state-of-the-art electrical equipment, we get the job done right for your residential and commercial projects. We provide a thorough consultation to explain your available options. With that information, you can choose the scope of work that’s right for your home or business and for your budget.

"I cannot say enough fantastic things about Juice Electrical. Not only was the work done beautifully but Matt and John were excellent communicators. I was away for the project but it didn’t matter as I felt I knew what was happening and when. Professional, timely and emphasis on safety. Could not be happier and heartily recommend them."

Gus K on May 2024


Avatar for Gold Medal Service
Gold Medal Service
20 Booker St
4.44(
487
)
Approved Pro
Gold Medal Service
20 Booker St
4.44(
487
)
Approved Pro
Customers say: Super punctual
156 local quotes requested
49 years of experience

Plumbing, HVAC, and electrical systems make your house livable. One minor issue with any of these systems can put your home at a standstill. In case you find yourself in this unfortunate situation, know that you can count on Gold Medal Service. For over 24 years, our company has been taking care of the homes of New Jersey residents through our top quality plumbing, HVAC, and electrical services. We are available 24 hours a day, 7 days a week to address even the most mind-boggling issues of your in-home equipment. From repairs, installations, and upgrades, our technicians are known for getting the job done right every time. We also provide upfront pricing with a full description of the service before commencing work to avoid any surprises down the line.

"If I could, I would give this horrible service provider a 0.0! I scheduled a plumbing appointment on a call, which was confirmed via multiple texts the day prior to the appt. Then had an employee go to the location during the 4 hour window they specified and wait for the plumber. On the day of the appt, 1 hour into the time window someone calls and says, sorry we’re not going to go because we only do residential plumbing. This was a surprise, as it was communicated to them that this was a business when I had set up the appt. So, I decided to speak with a manager. After spending over an hour of being bounced around from one dept to another, asking for a manager, they never connected me to one and their dispatcher had the audacity to say “sorry for your inconvenience, but you’ll just have to find someone else.” WOW! The hoops they make you jump through and the rudeness is not worth the hassle. I would definitely recommend you find a different plumbing pro for your project!"

Mark K on March 2024

Plumbing, HVAC, and electrical systems make your house livable. One minor issue with any of these systems can put your home at a standstill. In case you find yourself in this unfortunate situation, know that you can count on Gold Medal Service. For over 24 years, our company has been taking care of the homes of New Jersey residents through our top quality plumbing, HVAC, and electrical services. We are available 24 hours a day, 7 days a week to address even the most mind-boggling issues of your in-home equipment. From repairs, installations, and upgrades, our technicians are known for getting the job done right every time. We also provide upfront pricing with a full description of the service before commencing work to avoid any surprises down the line.

"If I could, I would give this horrible service provider a 0.0! I scheduled a plumbing appointment on a call, which was confirmed via multiple texts the day prior to the appt. Then had an employee go to the location during the 4 hour window they specified and wait for the plumber. On the day of the appt, 1 hour into the time window someone calls and says, sorry we’re not going to go because we only do residential plumbing. This was a surprise, as it was communicated to them that this was a business when I had set up the appt. So, I decided to speak with a manager. After spending over an hour of being bounced around from one dept to another, asking for a manager, they never connected me to one and their dispatcher had the audacity to say “sorry for your inconvenience, but you’ll just have to find someone else.” WOW! The hoops they make you jump through and the rudeness is not worth the hassle. I would definitely recommend you find a different plumbing pro for your project!"

Mark K on March 2024


Avatar for First Class Electric
First Class Electric
619 Raritan Rd.
4.79(
103
)
Approved Pro
First Class Electric
619 Raritan Rd.
4.79(
103
)
Approved Pro
Customers say: Super punctual
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
44 local quotes requested

Established in 2007, First Class Electric is here to help you with all electrical needs for your home and business in Cranford, NJ. Our licensed, insured, and bonded electricians will make your home and business more comfortable, safer, and brighter. About 70% of our business comes from repeat customers, demonstrating the high level of quality and service we provide. All of our work is 100% satisfaction guaranteed and comes with a lifetime warranty on labor which sets us apart from other electrical contractors. To schedule an appointment, give us a call at (908) 325-1777.

"second job- ceiling fans installed in bedroom"

Mark K on May 2021

Established in 2007, First Class Electric is here to help you with all electrical needs for your home and business in Cranford, NJ. Our licensed, insured, and bonded electricians will make your home and business more comfortable, safer, and brighter. About 70% of our business comes from repeat customers, demonstrating the high level of quality and service we provide. All of our work is 100% satisfaction guaranteed and comes with a lifetime warranty on labor which sets us apart from other electrical contractors. To schedule an appointment, give us a call at (908) 325-1777.

"second job- ceiling fans installed in bedroom"

Mark K on May 2021


Avatar for Green Sun Energy Services, LLC
Green Sun Energy Services, LLC
79 McCutcheon Ct.
4.96(
68
)
Approved Pro
Green Sun Energy Services, LLC
79 McCutcheon Ct.
4.96(
68
)
Approved Pro
Customers say: Quick response
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
41 local quotes requested

Founded in 2010, Green Sun Energy Services has helped thousands of New Jersey homeowners become more energy independent. We are a leading provider of solar panel installation programs, EV charging stations, GAF Timberline roofing systems, Generac generator installations and maintenance, as well as seasonal services like soft washing and professional Christmas light installation. Headquartered in Middletown, NJ, our local team proudly serves clients throughout Monmouth, Ocean, Middlesex, Somerset, Mercer, and Union counties.

"It’s been just shy of year since we had Green Sun Energy Services design and install a solar array and a standby generator at our home. I’d been thinking about “going solar” for some time. I spoke with one or two other solar-install companies before speaking with Green Sun. Glen, Green Sun head-honcho, came to my home and discussed the technical and economic aspects of the solar array. In addition to being very personable, I found Glen to be professional and exceedingly knowledgeable. I liked that fact that rather speaking with a sales rep, I was speaking with an owner of the company. And I took comfort in the fact that Green Sun is local (at least to me) and has been around for a number of years, has done many solar installs, and has several regular crews of installers. After surveying the attic and taking some measurements of the roof, Glen worked up an estimate for a solar array and standby generator. The estimate detailed what the system would look like, what it could do, and what it would cost. A further and very important consideration for me was what the solar array would look like. Having just completed a significant renovation to the exterior of our home, including a nice new roof, I didn’t want to compromise the look we achieved. In fact, I didn’t want to see the panels at all, at least from the front or sides of my home. Glen assured me that I wouldn’t. In fact, unlike some other solar-install companies, it turns out that Green Sun always sets the panels back at least four feet or so from the side edges of the roof. They “get” it. Since the payout looked good and I was very comfortable with Green Sun and Glen, we decided to proceed. Since part of my project was a standby generator, the electrical work was a bit more involved. Glen’s electrical contractor was amazing. He was easy to work with and really sweated the details. He showed up when we he said he would, and did all the prep work he could in anticipation of the actual solar-panel install and generator delivery. He obviously took great pride in his work, making sure everything was neat and expertly done. No less impressive were the solar-panel installers. Per the layout, they moved a roof vent and took the time necessary to line-up everything in accordance with Greg’s plan. The install proceeded without a hitch and looked great. Inspecting the attic, I couldn’t find a single fastener penetrating the roof deck; every screw/nail was sunk into the rafters. As promised, no part of the array is visible from the front or sides of the house. In fact, in my situation, the solar panels aren’t visible until I stand quite a distance away from the house in the backyard. Glen’s plumbing contractor showed up to plumb the stand-by generator as scheduled. Like the electrical, everything was done professionally and very neatly. In fact, when the inspector came by to perform his inspection, he commented on how neatly the unit was plumbed. As noted at the outset, my system has been operating for about a year. Everything started up without issue. My monthly electric bill is just under $3.00 per month; that’s not for usage –it’s a minimum that must be paid─ I have actually been banking electricity every month, for which I will receive a check/credit from my electric company at some point. I have cashed in the solar credits (SRECs) that I receive every few months. Between the SRECs, my $3-a-month electric bill, and the 30% federal tax credit, I’m on track for a 6-year or so payout. Just a couple of weeks ago, during the April Nor’easters, the power in my neighborhood went out for 4-5 hours. But not at my house; the generator kicked on in a few seconds. My only continuing awareness of the outage was how dark things were outside and the audible, but inoffensive drone of the generator. Bottom line, I couldn’t be more satisfied. The few questions I’ve had have been answered promptly and cheerfully by Glen or his business partner Chris. If you are thinking about “going solar,” or even just getting a standby generator, you really ought to give Glen at Green Sun a call. By the way, I understand that the federal tax credit is being phased out over the next 4-5 years, so if you are interested, you probably should move on it. I realize that this might sound like an “ad,” not a review, but it isn’t. I have no connection with Glen or Green Sun other than being an extremely satisfied customer; this review is simply my way of saying “thank you” to Green Sun."

wayne b on May 2018

Founded in 2010, Green Sun Energy Services has helped thousands of New Jersey homeowners become more energy independent. We are a leading provider of solar panel installation programs, EV charging stations, GAF Timberline roofing systems, Generac generator installations and maintenance, as well as seasonal services like soft washing and professional Christmas light installation. Headquartered in Middletown, NJ, our local team proudly serves clients throughout Monmouth, Ocean, Middlesex, Somerset, Mercer, and Union counties.

"It’s been just shy of year since we had Green Sun Energy Services design and install a solar array and a standby generator at our home. I’d been thinking about “going solar” for some time. I spoke with one or two other solar-install companies before speaking with Green Sun. Glen, Green Sun head-honcho, came to my home and discussed the technical and economic aspects of the solar array. In addition to being very personable, I found Glen to be professional and exceedingly knowledgeable. I liked that fact that rather speaking with a sales rep, I was speaking with an owner of the company. And I took comfort in the fact that Green Sun is local (at least to me) and has been around for a number of years, has done many solar installs, and has several regular crews of installers. After surveying the attic and taking some measurements of the roof, Glen worked up an estimate for a solar array and standby generator. The estimate detailed what the system would look like, what it could do, and what it would cost. A further and very important consideration for me was what the solar array would look like. Having just completed a significant renovation to the exterior of our home, including a nice new roof, I didn’t want to compromise the look we achieved. In fact, I didn’t want to see the panels at all, at least from the front or sides of my home. Glen assured me that I wouldn’t. In fact, unlike some other solar-install companies, it turns out that Green Sun always sets the panels back at least four feet or so from the side edges of the roof. They “get” it. Since the payout looked good and I was very comfortable with Green Sun and Glen, we decided to proceed. Since part of my project was a standby generator, the electrical work was a bit more involved. Glen’s electrical contractor was amazing. He was easy to work with and really sweated the details. He showed up when we he said he would, and did all the prep work he could in anticipation of the actual solar-panel install and generator delivery. He obviously took great pride in his work, making sure everything was neat and expertly done. No less impressive were the solar-panel installers. Per the layout, they moved a roof vent and took the time necessary to line-up everything in accordance with Greg’s plan. The install proceeded without a hitch and looked great. Inspecting the attic, I couldn’t find a single fastener penetrating the roof deck; every screw/nail was sunk into the rafters. As promised, no part of the array is visible from the front or sides of the house. In fact, in my situation, the solar panels aren’t visible until I stand quite a distance away from the house in the backyard. Glen’s plumbing contractor showed up to plumb the stand-by generator as scheduled. Like the electrical, everything was done professionally and very neatly. In fact, when the inspector came by to perform his inspection, he commented on how neatly the unit was plumbed. As noted at the outset, my system has been operating for about a year. Everything started up without issue. My monthly electric bill is just under $3.00 per month; that’s not for usage –it’s a minimum that must be paid─ I have actually been banking electricity every month, for which I will receive a check/credit from my electric company at some point. I have cashed in the solar credits (SRECs) that I receive every few months. Between the SRECs, my $3-a-month electric bill, and the 30% federal tax credit, I’m on track for a 6-year or so payout. Just a couple of weeks ago, during the April Nor’easters, the power in my neighborhood went out for 4-5 hours. But not at my house; the generator kicked on in a few seconds. My only continuing awareness of the outage was how dark things were outside and the audible, but inoffensive drone of the generator. Bottom line, I couldn’t be more satisfied. The few questions I’ve had have been answered promptly and cheerfully by Glen or his business partner Chris. If you are thinking about “going solar,” or even just getting a standby generator, you really ought to give Glen at Green Sun a call. By the way, I understand that the federal tax credit is being phased out over the next 4-5 years, so if you are interested, you probably should move on it. I realize that this might sound like an “ad,” not a review, but it isn’t. I have no connection with Glen or Green Sun other than being an extremely satisfied customer; this review is simply my way of saying “thank you” to Green Sun."

wayne b on May 2018


Avatar for Alpine Heating and Cooling
Alpine Heating and Cooling
125 Hillside Ave
4.69(
234
)
Approved Pro
Alpine Heating and Cooling
125 Hillside Ave
4.69(
234
)
Approved Pro
Customers say: Super punctual
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
126 local quotes requested

Alpine is a fourth-generation, family-owned business proudly serving Central NJ as the region’s premier air conditioning and heating company for more than five decades. We specialize in HVAC repairs, system replacements, and ongoing maintenance. Custom HVAC Solutions: We design systems specifically for your home’s size and your financial goals, with robust rebates, reduced utility bills and 0% financing available for up to 7 years. Honest, Skilled Technicians: Our licensed, fully trained technicians are focused on fixing the problem, not upselling you on unnecessary equipment or services. Seasonal Tune-Ups & Protection Plans: Keep your system running efficiently with seasonal tune-ups and take advantage of our service contracts for year-round peace of mind. Beyond Heating & Cooling: We also install hot water heaters, indoor air quality solutions like humidifiers and air cleaners, as well as generators and sump pumps to keep your home protected in emergencies.

"I’m so glad that my friend recommended Art and Alpine Heating and Cooling. Their prices are reasonable and the service is reliable. I’m glad I called!"

Arline D on June 2024

Alpine is a fourth-generation, family-owned business proudly serving Central NJ as the region’s premier air conditioning and heating company for more than five decades. We specialize in HVAC repairs, system replacements, and ongoing maintenance. Custom HVAC Solutions: We design systems specifically for your home’s size and your financial goals, with robust rebates, reduced utility bills and 0% financing available for up to 7 years. Honest, Skilled Technicians: Our licensed, fully trained technicians are focused on fixing the problem, not upselling you on unnecessary equipment or services. Seasonal Tune-Ups & Protection Plans: Keep your system running efficiently with seasonal tune-ups and take advantage of our service contracts for year-round peace of mind. Beyond Heating & Cooling: We also install hot water heaters, indoor air quality solutions like humidifiers and air cleaners, as well as generators and sump pumps to keep your home protected in emergencies.

"I’m so glad that my friend recommended Art and Alpine Heating and Cooling. Their prices are reasonable and the service is reliable. I’m glad I called!"

Arline D on June 2024


Avatar for Best Dressed Electric
Best Dressed Electric
16 Hilltop Rd
5.00(
31
)
Approved Pro
Best Dressed Electric
16 Hilltop Rd
5.00(
31
)
Approved Pro
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
66 local quotes requested

The replacement of any receptacle, switch, or lighting fixture, or part thereof. Receptacles in locations where ground-fault circuit interrupter protection, damp/wet, tamper-resistant are required. Repairs to any electrically operated equipment such as doorbells, communication systems, and any motor operated device. The installation of burglar alarms, security systems, or doorbells one and two family dwellings. Smoke and co detectors. Etc…,

"Jeremy was quick to respond, arrived right on time, and did a phenomenal job faster than most others would. He was very neat and professional and I highly recommend his services to anyone looking to have an electrical project completed."

Michael D on February 2025

The replacement of any receptacle, switch, or lighting fixture, or part thereof. Receptacles in locations where ground-fault circuit interrupter protection, damp/wet, tamper-resistant are required. Repairs to any electrically operated equipment such as doorbells, communication systems, and any motor operated device. The installation of burglar alarms, security systems, or doorbells one and two family dwellings. Smoke and co detectors. Etc…,

"Jeremy was quick to respond, arrived right on time, and did a phenomenal job faster than most others would. He was very neat and professional and I highly recommend his services to anyone looking to have an electrical project completed."

Michael D on February 2025


NM Electric
386 Watchung Avenue
5.00(
1
)
Approved Pro
NM Electric
386 Watchung Avenue
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
22 years of experience

We offer over 30 years of experience in the electrical industry. We take on a wide range of electrical projects to include full installation for additions and remodels as well as generator installs, wiring and panel upgrades, and a variety of other jobs. We take pride in our quality of work and our commitment to outstanding results. We’re committed to providing a personalized service for each individual project we take on. We look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

"Very professional always arrive on time and excellent work."

Latoya S on August 2021

We offer over 30 years of experience in the electrical industry. We take on a wide range of electrical projects to include full installation for additions and remodels as well as generator installs, wiring and panel upgrades, and a variety of other jobs. We take pride in our quality of work and our commitment to outstanding results. We’re committed to providing a personalized service for each individual project we take on. We look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

"Very professional always arrive on time and excellent work."

Latoya S on August 2021

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FAQs for generator installation projects in Sewaren, NJ

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 Sewaren, NJ homeowners’ guide to generator installations
From average costs to expert advice, get all the answers you need to get your job done.
Generator transfer switch
Feb 10, 2025
Feb 10, 2025
The cost to install a generator transfer switch depends on several factors. Our guide will help you understand all of the costs.
A mother assisting her daughter with homework
Jul 24, 2024
Jul 24, 2024
Keeping on top of generator maintenance and repairs gives you extra peace of mind as a homeowner. Find out how much regular generator maintenance costs.
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.
A natural gas generator in a house
Mar 11, 2025
Mar 11, 2025
Natural gas generators are whole-home standby generators that are connected to your home’s natural gas line. The average cost for a natural gas generator is $12,000.
Boy at home watching the rain from the window
Jul 23, 2024
Jul 23, 2024
Can a generator get wet? Protective covers are necessary for using a portable generator in the rain, and they shouldn’t be used in extreme weather.
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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