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TRUSTED BY MADISON, NJ HOMEOWNERS

  • Average homeowner rating star icon4.9
    Average homeowner rating
  • Verified reviews icon37
    Verified generator installs reviews

Find Generator install pros in Madison

Avatar for Green Sun Energy Services, LLC
Green Sun Energy Services, LLC
5.0(
73
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+2 more

Serving Madison, NJ and surrounding areas

Approved

In business since 2010

Free estimates

Warranties offered

"Since I am working at home it was needed. Glen and Chris were awesome to deal with as they walked us through the process step by step and every time they said someone would be here that person was. It was seamless and very easy to work with them and I would Highly recommend them if you are looking for a generator install."
Ruisi
Oceanport
Additional Photos
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Additional Photos

+55

Response time5 days
Response rate100%
5 neighbors recently requested a quote
Avatar for Kope Electric LLC
Kope Electric LLC
4.9(
97
)
Fixed Generator - InstallGenerator - InstallGenerator - Install - For Business

Serving Madison, NJ and surrounding areas

Approved

In business since 2008

Free estimates

Warranties offered

"An inexperienced/inept contractor had installed a generator for us and we parted ways with him when we discovered he neglected to pull permits for the work. We called Kope in for a consultation and they verified that not only was the generator not big enough to power our whole home (as was our intention) but it was installed illegally. We  hired them to guide us through the permit process, and bring the generator up to code which included piping a gas line through the garage, installing the correct sized pipes and fixing several mistakes with the electric. They were prompt, professional and knowledgable and coordinated seamlessly with the plumber they recommended to complete that part of the generator installation.  We now have have a safe, operating, legal generator. I would recommend Kope without hesitation and will use them for my future electrical needs.
"
Bathroom Lighting & Electrical
Bathroom Lighting & Electrical
Bathroom Lighting & Electrical
Bathroom Lighting & Electrical
Additional Photos

+38

Response time1 day
Response rate100%
6 neighbors recently requested a quote
Avatar for RAP Electric Co., Inc.
RAP Electric Co., Inc.
4.6(
137
)
Portable Generator - Install

Serving Madison, NJ and surrounding areas

Approved

In business since 1984

Free estimates

Emergency services offered

"Roy is really a prof. He installed two overhead fans and a hanging lamp. The fans had a complicated control system but he was able to get them to work flawlessly. Bonus: he is really a nice person and he cleaned up too! I would recommend his work to anyone."
Response time2 hrs
Response rate93%
Recommended by90%of homeowners
Avatar for Guardian Electric, LLC
Guardian Electric, LLC
4.9(
39
)
Fixed Generator - Install

Serving Madison, NJ and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"Guardian did great work installing recessed lighting and a support box in 2 rooms. Robert and his staff were very friendly and professional,I will definitely hire them again."
Electric Rough-In
New Ceiling Fan Installation
New Service Hook-Up
New Kitchen Renovation
New Switchboard Installation

+44

Response time9 hrs
1 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Hank's Electrical Contracting LLC
Hank's Electrical Contracting LLC
5.0(
40
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Madison, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"Living in Shongum Lake Area in Randolph, there are a lot of down trees/wiring, I wanted to install a backup mixed fuel generator to use during emergencies, installed a new light in my office and updated the drop ceiling lights to energy efficient lighting. Hank's Electrical Contracting updated our electrical panel installed a switch and connected our generator. Showed me how to make the switched and manage the main panel to go to generator mode. Hank's Electrical Contracting providing me and my family the safety we needed during emergency times. Pricing was fair and the service was professional. I highly recommend them for all electrical services."
Response time4 hrs
Response rate87%
3 neighbors recently requested a quote
Michael Bianchi LLC
4.7(
44
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Madison, NJ and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

We offer over 15 years of experience in the industry. At M Bianchi LLC, we combine technical expertise with a customer-first approach. Our company provides complete electrical services—from upgrades and rewiring to lighting design, smart-home integrations, and commercial installations. We pride ourselves on honesty, craftsmanship, and fast, reliable service. Whether it's a small repair or a large project, you can count on us for safe, efficient, and high-quality electrical work.

Response time12 hrs
Response rate100%
3 neighbors recently requested a quote
Avatar for Pipe Works Services Inc
Pipe Works Services Inc
4.4(
202
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Madison, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2000

Free estimates

Emergency services offered

"I have used Pipe Works on numerous occasions as of this date and find them to provide excellent service at competitive prices. Their associates are great to work with and their prices are competitive. The work is always completed on time, as promised and the work area is left clean. I appreciate that they point out things that need repair in the not so distant future. It was great to wake up the other day with power coming from my new Kohler Generator"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+93

8 neighbors recently requested a quote
Recommended by79%of homeowners
Avatar for First Wave Electrical
First Wave Electrical
4.7(
55
)
Portable Generator - Install

Serving Madison, NJ and surrounding areas

Approved

In business since 2006

Free estimates

Emergency services offered

"A+ for being prompt, accurate on time and on the scope of work. I did request to install needed equipment to run the generator and my house had some non-standard situations. I love that all challenges were solved in the right way, not the fast way. The electrician was very open-minded for debating on the possible approaches to an unexpected situations, etc. I love the work, very rational pricing and I would hire again."
Response time6 hrs
Recommended by96%of homeowners
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Generator Install questions, answered by experts

A 1,500 square foot home will likely need a 15kW to 20kW generator. When deciding on whole-house generator size, add up the total wattage of the devices that you’d like to continue running during a power outage. That way, you can ensure you purchase a generator that can power your necessary appliances or medical equipment during an electrical emergency.

You can expect a diesel generator to last for up to 30,000 hours of use, which works out to 20 to 25 years with the proper maintenance, of course. That depends on how much you use it, so a diesel generator used for emergencies a couple of times a year will last a lot longer than a generator that takes over for a faulty electrical grid every month for a day or two. 

An undersized whole-house generator has the potential to overheat and shut down when you try to run a central AC system. This scenario can not only damage the whole-house generator, but can also trip your home’s breakers or cause electrical damage. To avoid this situation, hire a local generator installer to correctly size your whole-house generator.

It’s usually better to repair your generator if it isn’t working properly, as it will typically be much more affordable and should yield similar results. Generator repairs cost around $300 on average, while installing a new whole-house generator costs around $5,000 on average. The only exception is if you know your generator is reaching the end of its useful life, usually between 30 and 40 years. If you have an older generator, you could face multiple repairs in the coming years, which might mean that a full replacement will be more cost-effective over time.

Generators run on a variety of fuel types, ranging from natural gas to solar power. Keep in mind that fuel costs varying by type:

  • Natural gas: $2,000–$21,000 per year 

  • Liquid propane: $2,000–$21,000 per year

  • Diesel: $3,000–$20,000 per year

  • Gasoline: $500–$3,000 per year

  • Solar generator: $2,000–$25,000 per unit

  • Battery backup: $10,000–$25,000 per unit

The Madison, NJ homeowners’ guide to generator installs

From average costs to expert advice, get all the answers you need to get your job done.