Top-rated generator install pros.

Get matched with top generator install pros in Delaware, NJ

Enter your zip and get matched with up to 5 pros

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

Select your specific project to find the pro for you.

Verified Reviews for Generator Install pros in Delaware, NJ

*The Angi rating for Generator Install companies in Delaware, 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 Delaware, 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 January 09, 2026

Find Generator install pros in Delaware

Avatar for RAP Electric Co., Inc.
RAP Electric Co., Inc.
4.6(
137
)

Serving Delaware, 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
Request Quote
Avatar for Pro Tech Electric, LLC
Pro Tech Electric, LLC
5.0(
10
)

Serving Delaware, NJ and surrounding areas

Approved

In business since 2007

Free estimates

Emergency services offered

"I asked for a team to install and wire 8 kitchen can lights. Great professional team that came in on time, did a great job protecting the kitchen, finished the job in less than 2 hours, and cleaned up behind themselves entirely. They charged a very reasonable price, and made the whole project as smooth and seamless as possible. Definitely recommend for your project."
6 neighbors recently requested a quote
Recommended by100%of homeowners
Request Quote
Lombardo Electrical Contracting LLC
New to Angi

Serving Delaware, 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%
2 neighbors recently requested a quote
Request Quote
Avatar for Simmz Electrical
Simmz Electrical
New to Angi

Serving Delaware, NJ and surrounding areas

Approved

Emergency services offered

Small jobs welcome

Simmz Electrical was founded by Joe Zita on a simple standard: electrical work should be done right the first time, with clear communication and uncompromising attention to detail.\nAs owner, Joe personally oversees projects to ensure every installation meets code, reflects professional craftsmanship, and leaves your home as clean as it was found. From panel upgrades to full lighting installations, the focus is always long-term reliability, not shortcuts

Request Quote
Avatar for Mister Sparky
Mister Sparky
4.6(
45
)

Serving Delaware, NJ and surrounding areas

In business since 2000

Emergency services offered

Credit card accepted

"We asked him to give us an estimate for some things we want done, and we are going to try to find somebody cheaper. They gave us an estimate and I thought it was too much."
Customer wanted lighting over pool table
Customer wanted new switches for pool light and a new Polaris
well house
generator
ceiling fan

+2

Recommended by85%of homeowners
Request Quote
Showing 1-10 of 46
Generator Install questions, answered by experts

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.

It might seem counterintuitive, but installing a generator transfer switch will save you money in the long run. While you’ll have to pay between $400 and $2,500 to have the transfer switch installed, you’ll recoup that amount later on when you don’t have to pay for expensive repairs to your appliances, devices, and electrical system that may have burned out, overloaded, or stopped working due to a sudden loss of power or an incorrect hook up of a generator to your home. 

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.

Yes, natural gas generators can work without electricity. Natural gas generators are a common type of backup or whole-house generator that operates when the electrical grid isn’t working. The trick is using a transfer switch (which usually needs to be installed with the generator) that safely switches the home electrical system from the power grid to generator power when needed.

To power a central air system during a power outage, the whole-house generator will need to be at least 5,000 watts, and this number will significantly increase for larger units. Check the specific wattage requirements of your AC unit to choose the right generator size. Consider consulting a generator installer to ensure your whole-house generator meets your electrical load needs.

The Delaware, 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