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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
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.

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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Generator Install FAQs, answered by experts

In most municipalities, you will need a permit to install a permanent home generator, including emergency backup, partial-home, and whole-home generators. A permit for a generator usually costs between $50 and $250, depending on where you live. Your electrician or certified generator installer will usually pull the permit for you—and might be required to do so by your building department—but you’ll be on the hook for the cost of the permit. You should ask your installer before agreeing to any work if they will pull the necessary permits for your project.

Many services include assembling the unit and securing it in the window. Confirm with your provider.

An undersized whole-house generator has the potential to overheat and shut down when you try to run a central AC system. This scenario can not only damage the whole-house generator, but can also trip your home’s breakers or cause electrical damage. To avoid this situation, hire a local generator installer to correctly size your whole-house generator.

While standby generators provide essential backup power, they can fail when you need them most due to lack of maintenance, fuel supply issues, dead batteries, electrical problems, or improper installation. To avoid costly failures, professional installation and regular maintenance are crucial. Licensed technicians ensure safety, uphold warranty requirements, comply with regulations, and provide expert servicing.

Energy output depends on turbine size, average wind speed at your site, and system efficiency. A 5 kW turbine in a good wind location can generate 8,000 to 12,000 kilowatt-hours per year, which may cover a large portion of an average home’s needs. Accurate output estimates require a professional wind assessment and a review of your household’s energy usage patterns.

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.