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Verified Reviews for Generator Install pros in Greenwich, NJ

*The Angi rating for Generator Install companies in Greenwich, 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 Greenwich, 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 September 15, 2026

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

George Sparks Electric, LLC
4.6(
45
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Greenwich, NJ and surrounding areas

Approved

In business since 1985

Free estimates

Emergency services offered

"The owner and his team where great. They fit me in there busy schedule and installed the generators wiring, tested it and made sure everything worked great. There Prices where reasonable and service great........"
Response time2 days
9 neighbors recently requested a quote
Recommended by97%of homeowners
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Avatar for Spotlight Solar, LLC
Spotlight Solar, LLC
4.7(
150
)
Portable Generator - Install

Serving Greenwich, NJ and surrounding areas

Approved

In business since 1987

Free estimates

Emergency services offered

"Installed one light fixture and three pendant lights. Prompt, efficient, courteous and professional."
Response time1 day
518 neighbors recently requested a quote
Recommended by97%of homeowners
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Avatar for Sebastian
Sebastian
New to Angi
Portable Generator - Repair

Serving Greenwich, NJ and surrounding areas

Approved

I’m Sebastian I am a new electrician who gets my electrical certificate at the end of April. I have excelled through my program at Pennco Tech and I have really good skills in repairing and installing lights, switch’s, breakers, circuits, etc.

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Avatar for Mister Sparky Electric
Mister Sparky Electric
4.0(
57
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Greenwich, NJ and surrounding areas

In business since 2003

Emergency services offered

Credit card accepted

"They sent two very professional Electrician's who worked 9 hours without taking not even one break or a lunch.
They were very good, clean, worked well together, and presented themselves very professional.
 
As I said they were electricians and not carpenters. 
They had to cut into my wall to have the new panel fit and they
left a 4 inch gap by 12 inches long under the panel installation and they left the wall paneling unattached that surrounds the new electric panel.  The cut they made at the bottom is jagged and very rough.  I can visibly see all the wiring under the electric panel and behind the wall paneling.
 There are also two copper wires out in my back yard that are sticking up from the ground where they didn't bury them deep enough.  I am afraid my lawn service will run over them if I don't mark off that area.
 
I also have not received an invoice nor a receipt from either time they were at my house.  All I will have is my credit card STATEMENT.  This I know was my fault but I was still in a state of shock having to worry about a possible fire and where the money was coming from. 
That is why I gave them a C instead of an A.  Although they informed me the new panel was bigger and they had to cut, I just think they should have taken a little more time to measure and nail up the existing wall.
Today I see an offer on Angies List for the same service for half the amount they charged me.  I am certainly sure that I have been ripped off.
"
Recommended by81%of homeowners
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Avatar for RC Heating & Air Conditioning
RC Heating & Air Conditioning
4.4(
40
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Greenwich, NJ and surrounding areas

In business since 1989

Free estimates

Emergency services offered

"RC Heating replaced my air conditioner, furnace and water heater. Installation was fast and efficient.  Everything works fine."
Better Business Bureau
South Jersey Gas
Chamber of Commerce
Recommended by89%of homeowners
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Generator Install FAQs, answered by experts

As a safety measure, you should always turn off the main breaker while operating your generator’s backup breaker. In addition, you should also switch off all appliance breakers so you don't have a power surge when the main breaker turns back on. And finally, turning off the main breaker prevents back-feeding, which endangers utility workers with the risk of electrocution. Back-feeding could also destroy the electrical circuits of your neighbors if they use the same power network.

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. 

In some situations, yes. Never try to put biofuel into any home generator without checking the specifics first. If a generator has the ability to run on diesel, it can also run pure biofuel (the clear kind made from seed oils, for example). But if you are using biofuel made from animal fats or vegetable oils, the generator will need significant modifications before it can handle a sludgier type of biofuel.

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.

These advanced generators use a key fob or a smartphone app to remotely start, which is ideal for getting power back on immediately without venturing outside. This feature is more common on whole home generators, but you may be able to find it on large portable generators, too.

The Greenwich, NJ homeowners’ guide to generator installs

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

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