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Best generator install pros near Nassau, NY

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Top-Rated Generator install pros in Nassau - Updated Nov 2026

S & S Electric of NY, LLC
5.0(
141
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Nassau, NY and surrounding areas

Approved

Super Service Award Winner

In business since 1989

Free estimates

Emergency services offered

"Very responsive and easy to work with. High quality work, has extensive electrical experience. Also provided and installed whole house back up generator."
New 200 amp electrical service panel
Existing 100 amp electrical service meter & pa
Exiting 2 meter, 2 panel electrical service
New 2 family, 2 panel circuit breaker service
Response time1 day
3 neighbors recently requested a quote
Recommended by74%of homeowners
Avatar for Rubino Electric
Rubino Electric
4.8(
27
)
Fixed Generator - InstallPortable Generator - Install

Serving Nassau, NY and surrounding areas

Approved

In business since 1999

Free estimates

Customers say: Terrific value

"Awesome service!!! Really did an outstanding job for install, planning, and cleanup. Needed a new wire run and circuit for a new over the range microwave. Again awesome job! Highly recommended!!"
Service upgrades
Response time10 hrs
Response rate93%
2 neighbors recently requested a quote
Avatar for Crisafulli Bros. Home Services
Crisafulli Bros. Home Services
4.7(
73
)
Fixed Generator - InstallFixed Generator - Repair

Serving Nassau, NY and surrounding areas

Approved

In business since 1939

Credit card accepted

Offers commercial services

"Brandon came out this morning to assess the issue. He was very polite and professional. Maximus and Jon were my installers. They were professional, polite and got the job done timely. Great guys!"
Response time9 hrs
Response rate86%
49 neighbors recently requested a quote
Avatar for Least Resistance Electrical Contracting LLC
Least Resistance Electrical Contracting LLC
5.0(
14
)
Fixed Generator - Install

Serving Nassau, NY and surrounding areas

Approved

In business since 2025

Emergency services offered

Warranties offered

"We needed to install a new EV charger for the house we recently moved into, and Steven was a total pro. He worked to understand the nuances of the house to find efficient and durable solutions in the installation of the unit. Friendly and approachable throughout the process, he took the time to talk through any considerations that arose. We've been very happy with the charger. When the next electrical need comes up for us, Least Resistance will be at the top of our list!"
Let There Be Light!
Sub Panel
Early Stages of Electrical Rough In.
4 Gang Switch Box
Sub Panel Service Entry

+17

4 neighbors recently requested a quote
Avatar for CHIEF ELECTRIC LLC
CHIEF ELECTRIC LLC
5.0(
20
)
Portable Generator - Install

Serving Nassau, NY and surrounding areas

Approved

In business since 2008

Free estimates

Emergency services offered

"Excellent job installing our 120V outdoor generator outlet! The weatherproof box is securely mounted, ran the conduit neatly, and clearly labelled for emergency use. I truly appreciate the quick turnaround time and how efficient you got everything set up and tested. Highly recommend for any fast reliable electrical work!"
CHIEF ELECTRIC LLC
13 neighbors recently requested a quote
Avatar for Andrus Power Solutions
Andrus Power Solutions
5.0(
1
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Nassau, NY and surrounding areas

Approved

In business since 1991

Free estimates

Emergency services offered

"We had a great experience with Andrus. Tony came out before our Kohler generator installation to clean up our electrical panel and did an incredibly thorough job. Everything was left clean and organized. The generator installation itself went very smoothly. The team was professional, knowledgeable and respectful of our property, and everything was explained clearly along the way. We're very happy with the finished installation and feel much better knowing we're prepared for the next outage. Would definitely recommend Andrus!"
Generator Repair
Response time6 days
1 neighbors recently requested a quote
Avatar for Troy Generator Service
Troy Generator Service
New to Angi
Fixed Generator - Repair

Serving Nassau, NY and surrounding areas

Approved

In business since 2015

Free estimates

Credit card accepted

Troy Generator Service LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers interests, and make their concerns the basis of our business. 21 years experience.

Response time20 mins
Showing 1-10 of 36
Generator Install FAQs, answered by experts

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. 

Carbon monoxide emissions aren’t only dangerous to human life, but they also harm our planet. While natural gas generators emit lower levels of CO than other fuel sources, there are still ways to reduce emission levels. For example, shop around for an eco-friendly generator that complies with current emission standards. Also, make sure your generator is serviced regularly to avoid CO buildup. 

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. 

A home that is 2,500 square feet will likely need a 20kW to 25kW generator. Consult your local generator installer to confirm the generator size needed to power your home before purchasing a new one. Be sure to consider how much power your necessary devices need to run.

You can determine what size generator you need for a transfer switch by matching the switch to the largest outlet on your generator. Larger generators can power up to 10 circuits, while most 5,000-watt generators can provide power to six circuits. So, if your generator’s largest outlet is 30 amps, you’ll need a 30-amp transfer switch.

The Nassau, NY homeowners’ guide to generator installs

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