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TRUSTED BY MENDHAM, NJ HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon42
    Verified generator installs reviews

Verified Reviews for Generator Install pros in Mendham, NJ

*The Angi rating for Generator Install companies in Mendham, NJ is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.

*The HomeAdvisor rating for Generator Install companies in Mendham, NJ is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.

Last update on July 31, 2025

Find Generator install pros in Mendham

Avatar for Green Sun Energy Services, LLC
Green Sun Energy Services, LLC
5.0(
73
)

Serving Mendham, NJ and surrounding areas

Approved

In business since 2010

Free estimates

Warranties offered

"Glen and his team were prompt and professional during both installation and annual maintenance. We lost power during the last hurricane and the generator worked perfectly. Pricing was very good and Glen was even able to get me an extended warranty (promo from Generac). I would recommend Green Sun."
Ruisi
Oceanport
Additional Photos
Additional Photos
Additional Photos

+55

Response time4 days
6 neighbors recently requested a quote
Recommended by95%of homeowners
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Avatar for Kope Electric LLC
Kope Electric LLC
4.9(
97
)

Serving Mendham, 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 time2 days
7 neighbors recently requested a quote
Recommended by98%of homeowners
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Avatar for Princeton Electrical Makeover LLC
Princeton Electrical Makeover LLC
4.5(
204
)

Serving Mendham, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2008

Free estimates

Emergency services offered

"Amazing service! They gave the fairest price and came to install it immediately. They were professional and I highly recommend them. I would use them again."
Tesla in charging status
Wiring Tesla Wall Connector
Full installation
Connection in the panel
Additional Photos

+26

Response time2 days
22 neighbors recently requested a quote
Recommended by89%of homeowners
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Avatar for RAP Electric Co., Inc.
RAP Electric Co., Inc.
4.6(
137
)

Serving Mendham, 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
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Avatar for Plesh Electric, LLC
Plesh Electric, LLC
4.4(
111
)

Serving Mendham, NJ and surrounding areas

Approved

In business since 1972

Free estimates

Emergency services offered

"Tony Plesh was very knowledgeable concerning generator installation. It was very comfortable talking to him. He answered all our questions clearly."
Outdoor Closed Panel Upgraded
Residential Generator
Outdoor Open Panel Upgraded
Residential Generator
Upgraded Panel Closed

+19

Response time2 days
5 neighbors recently requested a quote
Recommended by97%of homeowners
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Avatar for Guardian Electric, LLC
Guardian Electric, LLC
4.9(
39
)

Serving Mendham, NJ and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"Chris called me back the day I called him. Once my lighting fixture arrived he showed up the next day and installed it. Rate was reasonable compared to other companies. I would use this company again and I would highly recommend them."
Electric Rough-In
New Ceiling Fan Installation
New Service Hook-Up
New Kitchen Renovation
New Switchboard Installation

+44

Response time9 hrs
2 neighbors recently requested a quote
Recommended by83%of homeowners
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Avatar for North Crest, LLC
North Crest, LLC
5.0(
51
)

Serving Mendham, NJ and surrounding areas

Approved

In business since 2020

Free estimates

Warranties offered

"Ken installed recessed lighting in my living room. He provided full explanation of the wiring necessary for the project as well as specific lighting options. Ken was very professional throughout the project - he showed up on time and took extraordinary care during installation and provided this service at a very fair price. I would highly recommend him for all your electrical needs!"
Response time11 hrs
Response rate91%
5 neighbors recently requested a quote
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Avatar for Anzalone Electric & Lighting, LLC
Anzalone Electric & Lighting, LLC
4.9(
110
)

Serving Mendham, NJ and surrounding areas

Approved

In business since 2008

Free estimates

Small jobs welcome

"Scott did an excellent job of installing and outdoor motion light and also a bathroom ceiling light. Everything was done neatly and efficiently."
Finished panel
Electric Tie in
installing breakers
The old mast
Response time8 hrs
10 neighbors recently requested a quote
Recommended by100%of homeowners
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Avatar for Hank's Electrical Contracting LLC
Hank's Electrical Contracting LLC
5.0(
40
)

Serving Mendham, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"Henry did an amazing job installing my video door bell . He was very patient helping me set up the WiFi. I would definitely recommend him!"
Response time4 hrs
Response rate86%
14 neighbors recently requested a quote
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Generator Install questions, answered by experts

In most municipalities, you will need a permit to install a permanent home generator, including emergency backup, partial-home, and whole-home generators. A permit for a generator usually costs between $50 and $250, depending on where you live. Your electrician or certified generator installer will usually pull the permit for you—and might be required to do so by your building department—but you’ll be on the hook for the cost of the permit. You should ask your installer before agreeing to any work if they will pull the necessary permits for your project.

The amount of time a standby generator can run continuously is around 3,000 hours on average. However, standby generators can generally run indefinitely as long as they have a continuous fuel supply. Generators hooked up to a home’s natural gas supply are the best option for extended usage, as these won’t rely on a finite fuel supply based on how much you have in storage. Generators running on liquid propane or diesel won’t last as long, as these require fuel storage and regular refueling to stay running.

Whole-house generators can run continuously for extended periods, even for weeks at a time (around 400 to 500 hours), as long as they have a sufficient fuel supply. However, this type of extensive use will increase wear and tear and can shorten the generator's overall lifespan. During long periods of operation, it's important to check and refill the engine oil as needed, potentially as frequently as daily depending on the model. If your generator uses a fuel tank, ensure it is kept full to prevent unexpected shutdowns.

No, you should never plug a generator directly into a wall outlet in your house. This practice is extremely dangerous, often illegal, and can cause "back-feeding," where power from the generator flows back into utility lines, creating a life-threatening hazard for utility workers. It can also damage your home's electrical system, including appliances like pumps and HVAC fans. If the main power is restored while the generator is connected, it can destroy the generator and cause an electrical fire. To safely connect a generator, you must use a professionally installed transfer switch or an interlocking kit, which prevents back-feeding by disconnecting your home from the utility grid before the generator provides power.

Natural gas and electricity rates vary significantly based on location, and pricing can change over time, too. It’s possible that in locations where natural gas is particularly inexpensive, it will cost less than grid-based electricity will. However, you should also factor in the generator’s initial costs and maintenance needs, as well as its noise level and if it can comfortably power all your home appliances.

The Mendham, NJ homeowners’ guide to generator installs

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

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