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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

"Wes returned our phone call & set up a consultation appointment. Followed up with a quote and explanation of costs. We set up the installation time and Wes arrived / installed bathroom fan /ran the fan to ensure satisfaction then cleaned up the work space. We would recommend S&S Electric."
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
1 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

"John is a customers ultimate contractor, heâ s very professional, when he says heâ s going to be there heâ s there, which is a rarity today, I had to redo my electrical service over and add 4 panels with meters on a rental property that I owned in Troy , John design the job and did it exactly the way that we Discussed it , in a very timely manner and very neat.( I am and electrician down in the city, so for me to have someone reliable and trustworthy to do my work on my properties is very comforting) I will use him on any future work that I have."
Service upgrades
Response time10 hrs
Response rate93%
1 neighbors recently requested a quote
Avatar for Crisafulli Bros. Home Services
Crisafulli Bros. Home Services
4.7(
72
)
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%
48 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

"Installed a 220W plug in for my welder. Great work super nice guy! Definitely recommend. Went over everything with me, very detailed and takes pride in his work. Easy to contact and answers very quickly. Thanks Steve!"
Let There Be Light!
Sub Panel
Early Stages of Electrical Rough In.
4 Gang Switch Box
Sub Panel Service Entry

+17

5 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
19 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
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 questions, answered by experts

With proper maintenance, a whole-house generator can last between 20 and 40 years. The specific lifespan depends on how often and for how long the generator is used, and some models may have their life expectancy rated in hours of operation. To maximize its lifespan, expect to spend around $150 to $300 per year for annual maintenance checks from a qualified technician. During these checks, a technician will inspect the engine filter, starting mechanism, fuel, lubrication, and coolant levels. Consulting your installer and choosing a low-impact fuel like natural gas or diesel can also help ensure your generator lasts as long as possible.

The cost to install a whole-house generator averages $5,200, with a typical price range of $1,500 to $8,900. However, total costs can vary from $400 for a small portable unit to over $18,000 for a large-capacity system. The most significant cost factor is the generator's size and capacity, but other variables include the brand, fuel type, and labor for assembly and installation.

Generator costs can be broken down by type:

  • Portable or Emergency Backup Generators (1kW–7.5kW): $500 to $2,000

  • Partial-Home Generators (9kW–20kW): $2,000 to $6,500

  • Whole-House Generators (22kW–48kW): $5,000 to $18,000

To avoid paying for more power than you need, consider hiring an electrician to calculate the electrical load for your essential appliances. It is also recommended to get at least three quotes to find the best deal for your specific needs and budget.

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. 

Whole-house generators need to be installed on level ground several feet away from walls and other objects. Because they tap into the electrical system directly, they usually need to be close to your home electrical panel for a transfer switch installation. It also helps with installation if they are near to a gas line or propane tank installation.

Yes. You can connect your home back-up battery to a generator with its designated charger. Be sure that the output of the generator matches the input requirements for the battery for best results.

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.