Top-rated generator install pros.

Get matched with top generator install pros in Williamstown, NJ

Enter your zip and get matched with up to 5 pros

Need a pro for your generator install project in Williamstown, NJ?

Select your specific project to find the pro for you.

Verified Reviews for Generator Install pros in Williamstown, NJ

*The Angi rating for Generator Install companies in Williamstown, 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 Williamstown, 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 08, 2026

Find Generator install pros in Williamstown

Avatar for Smith Power Group, Inc.
Smith Power Group, Inc.
5.0(
19
)

Serving Williamstown, NJ and surrounding areas

Approved

In business since 2011

Free estimates

Offers commercial services

"Working with Smith Power Group, Inc. was a very rewarding and mutually beneficial experience. The owner, Carlton, sat with us and explained the entire process and answered all of our questions. The office kept us informed concerning the necessary paperwork, permits, etc. On the day of installation the crew arrived on time and proceeded to install our generator without issues. We highly recommend SPG."
Generator/ Propane
Generator 10kw
Solar Deptford
My Work
My Work

+3

Response time2 days
6 neighbors recently requested a quote
Recommended by94%of homeowners
Request Quote
Avatar for Kidder Enterprises, LLC
Kidder Enterprises, LLC
4.6(
138
)

Serving Williamstown, NJ and surrounding areas

Approved

In business since 1980

Free estimates

Emergency services offered

"Ken was hired to put a sub-panel in the garage, but he notice that rain was getting in the main panel. I hired him to replace the service coming down the side of the house, through the meter box and then the main panel and sub-panel. He did a great job. He was clean and neat and he worked around my work-from-home needs to electricity. He did the service and main panel on a Saturday and I had minimal power disruption. He is friendly and knowledgeable. I would definitely hire him again."
Response time12 hrs
9 neighbors recently requested a quote
Recommended by64%of homeowners
Request Quote
Avatar for Mister Sparky of Turnersville
Mister Sparky of Turnersville
5.0(
7
)

Serving Williamstown, NJ and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"Fantastic work! They installed under-cabinet LED lighting in our kitchen, and it has completely transformed the space. The lighting is crisp, bright, and perfectly placed to illuminate the countertops and backsplash. The team was prompt, clean, and extremely professional throughout the process. Highly recommend!"
Request Quote
Avatar for AMF Electric, LLC
AMF Electric, LLC
5.0(
3
)

Serving Williamstown, NJ and surrounding areas

Approved

In business since 2009

Free estimates

Warranties offered

"The gentlemen who performed the service were courteous and professional. They left the area as clean as when they started. I highly recommend AMF Electric!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+7

10 neighbors recently requested a quote
Recommended by100%of homeowners
Request Quote
Avatar for Harris Plumbing, Heating, Air & Electrical
Harris Plumbing, Heating, Air & Electrical
3.9(
44
)

Serving Williamstown, NJ and surrounding areas

Approved

In business since 1988

Credit card accepted

Customers say: Quick response

"Harris has great people to work with who really know what they are doing. They will be my number one go to for any services they offer."
Team
Team
Team
Truck
Truck

+8

Response time1 day
491 neighbors recently requested a quote
Recommended by33%of homeowners
Request Quote
Avatar for Horizon Services, Inc. (NJ)
Horizon Services, Inc. (NJ)
3.9(
1,635
)

Serving Williamstown, NJ and surrounding areas

Approved

In business since 1989

Credit card accepted

Customers say: True professional

Experience The Horizon Difference.\n\nOn-Time Service. Up-Front Pricing. And The Job Done Right and Clean the First Time. GUARANTEED!\n\nHorizon Services is the regions largest and most well respected plumbing, heating and air conditioning company, with nearly 600 employees serving tens of thousands of homeowners throughout Delaware, Southeastern Pennsylvania, Southern New Jersey, and Northeastern Maryland. After a quarter of a century in business, Horizons Services remains fully committed to setting the industry standard for customer service, installation, and focusing on things that are important to busy homeowners: respect for their time, their home and their property; up-front pricing, and an unconditional 100% money back guarantee.\n

Recommended by88%of homeowners
Request Quote
Avatar for Hutchinson Plumbing Heating Cooling, LLC
Hutchinson Plumbing Heating Cooling, LLC
3.9(
111
)

Serving Williamstown, NJ and surrounding areas

Approved

In business since 1948

Free estimates

Credit card accepted

If it is 2 am and your air conditioner just broke, then Hutchinson is here to help. Our company has trained Customer Service Representatives waiting to take your call, with technicians ready to fix your air conditioner 24/7. Whether you are in Gloucester County NJ or Delaware County PA, our fully-stocked repair vehicles contain all of the parts we need to get you cool again; TODAY!

Recommended by80%of homeowners
Request Quote
Avatar for Ace’s Electrical Construction
Ace’s Electrical Construction
5.0(
1
)

Serving Williamstown, NJ and surrounding areas

Approved

Free estimates

Offers commercial services

Hello we offer full electrical services ranging from new services, panels, new wiring, troubleshooting, lighting, kitchens, bathrooms, and so much more\n\nFully Licensed in PA, NJ and DE\n\n

Service
Service
Service
Service
Request Quote
...
Showing 1-10 of 67
Generator Install questions, answered by experts

Generally, you’ll want to keep between 60 and 70 feet between the generator and the transfer switch. There are a few reasons for this, including:

  • The distance reduces the noise coming from the generator into your home.

  • It increases efficiency because you won’t have a voltage drop from this short of a distance.

  • Prevents carbon monoxide poisoning: keep at least 15 feet between your generator and an open window. 

If you’re wondering whether gas generators produce carbon monoxide, know that natural gas generators do not produce carbon monoxide if they are functioning properly, as natural gas burns cleanly. However, if the generator malfunctions and the gas does not burn completely, there is potential for carbon dioxide to be produced. To prevent malfunctions, it's crucial to perform regular maintenance, including running the generator weekly and scheduling professional inspections every 6 to 12 months. Also, be sure to test your carbon monoxide detectors regularly to ensure they function in the rare case of the generator producing carbon monoxide.

To determine the right size generator for your house, you should calculate the total wattage of the appliances and devices you want to power during an outage. List all essential items, note their start-up wattages, and add them together.

Here are some typical wattage requirements for common appliances:

  • Refrigerator: 600 watts

  • Large dehumidifier: 700 watts

  • Large window air conditioner: 1,400 watts

  • Water heater: 3,000 to 4,500 watts

  • Electric furnace: 5,000 to 25,000 watts

A 7,500-watt generator might be sufficient for essentials like a refrigerator, freezer, well pump, and lighting circuits. However, for high-demand items like a water heater or furnace, a whole-home generator is a better choice. A portable generator may be enough if you only need to power a few critical items.

While home square footage can offer a rough estimate, it is not always a reliable indicator. For reference, here are some typical generator sizes based on square footage:

  • 1,000 sq ft: 6–9 kW

  • 1,500 sq ft: 7–10 kW

  • 2,000 sq ft: 10–14 kW

  • 2,500 sq ft: 12–16 kW

  • 3,000 sq ft: 16–20 kW+

For the most accurate sizing, consult a professional who can calculate your home's peak and average power consumption and recommend the optimal generator.

You may need a permit for a portable generator if you’ll be installing a transfer switch for your primary residence or similar work. Otherwise, a permit for other uses may not be necessary. Check your local building codes or ask a local generator installer for more information about your local regulations.

Portable generators provide backup power for essential appliances during outages and are easy to relocate.

The Williamstown, NJ homeowners’ guide to generator installs

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

See all articles