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Verified Reviews for Generator Install pros in Washington, NJ

*The Angi rating for Generator Install companies in Washington, 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 Washington, 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 13, 2026

Find Generator install pros in Washington

Avatar for RAP Electric Co., Inc.
RAP Electric Co., Inc.
4.6(
137
)
Portable Generator - Install

Serving Washington, NJ and surrounding areas

Approved

In business since 1984

Free estimates

Emergency services offered

"Did all we needed quickly and in one day. Friendly, enjoyed having him in my house. Very reasonable price, really thought it would be much more. I had others working in my house while he was here and he worked very well around and with them. Great overall electrician."
Response time2 hrs
Response rate93%
Recommended by90%of homeowners
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Avatar for Quantum Electric
Quantum Electric
4.7(
14
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Washington, NJ and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"Perfect at place of business and home. Replaced lights with led. New switches new wiring ; updated service breakers and installed new service for additional heating units"
7 neighbors recently requested a quote
Recommended by92%of homeowners
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Avatar for Current Electric Contracting, LLC
Current Electric Contracting, LLC
4.1(
44
)
Generator - Install - For Business

Serving Washington, NJ and surrounding areas

Approved

In business since 2002

Free estimates

Emergency services offered

"We had outlets installed. They wasted no time in getting the job done. They were Very Courteous, they new what they were doing and they were very clean! They put plastic around where ever they were drilling. Great Job!"
Arisol Job
Pack and Rent
Hillsborough Medical Offices
Starray Facility
Response time1 day
Recommended by73%of homeowners
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Avatar for Mr. Electric of Hunterdon
Mr. Electric of Hunterdon
4.8(
16
)
Portable Generator - InstallPortable Generator - Repair

Serving Washington, NJ and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

"Julie came from Mr. Electric and installed our smoke alarms. She was polite, professional and did an excellent job."
New ceiling fan
Tesla
Light fixture before
Charge Point
Light fixture before

+60

Response time3 hrs
Response rate98%
Recommended by20%of homeowners
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Avatar for Gold Medal Service, LLC (South)
Gold Medal Service, LLC (South)
3.7(
421
)
Fixed Generator - InstallFixed Generator - Repair

Serving Washington, NJ and surrounding areas

Approved

In business since 1978

Free estimates

Emergency services offered

"Actual generator not yet installed but they did work on a water purification system for me. Work completed on time and at price arranged . No hidden surprises."
Before - Exterior Electric Box
After - Exterior Electric Box
15 neighbors recently requested a quote
Recommended by85%of homeowners
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Avatar for Modern Home Improvements, Corp.
Modern Home Improvements, Corp.
4.2(
9
)
Portable Generator - Repair

Serving Washington, NJ and surrounding areas

Approved

In business since 2002

Free estimates

Emergency services offered

"I hired these company to install curtain rods in my house, they did a great job and went above and beyond to make sure I was satisfied. I would use them again and recommend them to others."
Amazing Kitchen with upgrades
Kitchen Without upgrades
hardwood Flooring done right
after with new matching Floor
before without the upgrades

+5

Response time1 day
Recommended by100%of homeowners
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Avatar for Simmz Electrical
Simmz Electrical
5.0(
1
)
Portable Generator - Repair

Serving Washington, NJ and surrounding areas

Approved

Emergency services offered

Small jobs welcome

"Joe from Simmz Electrical was very skilled, charged a fair price and was great to work with. He did a wonderful job, worked very carefully and was very neat. He communicated with us quickly; is very reliable and prompt. We felt comfortable with him in our home; he is now our go to guy for anything electrical. Lucky find"
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Lombardo Electrical Contracting LLC
New to Angi
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Washington, NJ and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

We have a single mission: Complete Customer Satisfaction! We have consistently focused on the needs of our customers, providing personalized attention and a stress-free experience.\nYou will find us to be competitively priced with close attention to the details.\nOur reputation is based on service, safety, and quality, regardless of how large or small the job.

Response time20 mins
Response rate100%
4 neighbors recently requested a quote
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Schultz Bros Electric
4.7(
96
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Washington, NJ and surrounding areas

In business since 1989

Free estimates

"The estimate for the new circuit installation was done promptly and on-time. The work was performed on the date scheduled. John Schultz was professional, courteous and thorough.
Getting anything scheduled and completed the week of the Christmas holiday can be challenging if not impossible no matter what the task may be, but the work was completed without delay or complication at a very fair price. Not only would I not hesitate to hire Schultz Bros Electric for future electrical work, but my wife and I already plan on just that for other projects this Spring.

Our thanks to John for the prompt and thorough work performed!
"
Recommended by98%of homeowners
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Generator Install questions, answered by experts

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.

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. 

To reduce AC startup power for a whole-house generator, install a soft start kit or hard start capacitor, which lowers the initial surge by gradually ramping up the compressor. Using a smart load manager can also help by staggering startup loads, preventing a system overload and future costly repairs.

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 Washington, 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