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Avatar for Green Sun Energy Services, LLC
Green Sun Energy Services, LLC
5.0(
73
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+2 more

Serving Interlaken, NJ and surrounding areas

Approved

In business since 2010

Free estimates

Warranties offered

"A wonderful experience for a complicated project! I would use Green Sun Energy again for any service they provide. They made the generator install as easy and painless as possible. The crew was kind and efficient. Lots to do for an install such as this but they did it quickly, efficiently and were extremely organized. Just how I like it! Thank you so much!! We feel protected for whatever comes our way."
Ruisi
Oceanport
Additional Photos
Additional Photos
Additional Photos

+55

Response time5 days
Response rate100%
6 neighbors recently requested a quote
Avatar for Pressey Electrical Services, LLC
Pressey Electrical Services, LLC
5.0(
22
)
Fixed Generator - RepairGenerator - Install - For BusinessGenerator - Repair - For Business+2 more

Serving Interlaken, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2013

Free estimates

Emergency services offered

"He installed this generator, worked flawlessly in the most recent power outage, and the install process was efficient and clean. From the permit process to the install and price, everything was on point, and everything was as described. If I could I?d leave 10 out of 5 stars. Highly reccomend and will be using him in the future for my next projects."
Response time4 hrs
Recommended by10%of homeowners
Avatar for Watts Good Electric
Watts Good Electric
4.9(
48
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Interlaken, NJ and surrounding areas

Approved

In business since 2016

Free estimates

Emergency services offered

"These guys are great - had a couple of issues and they immediately helped without question; including come to change a manufacturer's defect long after the job was completed at no additional charge. I will be hiring them for any future electrical projects and recommend you do the same!"
Chandelier Installation
Vineyard Vines
Vineyard Vines
Vineyard Vines
Vineyard Vines

+19

Response time8 hrs
Response rate88%
Recommended by97%of homeowners
Avatar for Revolution Electric LLC
Revolution Electric LLC
4.8(
34
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Interlaken, NJ and surrounding areas

Approved

In business since 1997

Free estimates

Credit card accepted

"Revolution Electric updated and reworked all our electric for our 100 year old home remodel. We still had knob and tubes under our plaster walls. They modernized all of our electric from timed lighting indoors and out, full WiFi and boosters, generator installation and even buried our electric lines outside. They are professional, timely, courteous and so easy to work with. They stayed on budget, patiently helped me find cost effective solutions and fully trained me on how to manage all of the systems we installed. I fully would recommend them and rate them a 10 out of 10."
Kitchen
Cooktop Wall
Kitchen
Basement Bar
Exterior New Home

+25

Response time6 hrs
Response rate100%
6 neighbors recently requested a quote
Avatar for ILL Electrical Services
ILL Electrical Services
5.0(
10
)
Fixed Generator - InstallGenerator - InstallGenerator - Install - For Business+2 more

Serving Interlaken, NJ and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

"Renaldo was professional, came on time and did a great job. He installed 2 ceiling fans , installed multiple gfi outlets and upgraded wiring to the panel box. Wonderful service! He thoroughly explained the job and I will definitely call him again."
100 amp meter replacement
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+3

Response time7 hrs
Response rate91%
6 neighbors recently requested a quote
Avatar for A Shore Thing Electric, LLC
A Shore Thing Electric, LLC
4.7(
51
)
Portable Generator - Install

Serving Interlaken, NJ and surrounding areas

Approved

In business since 2016

Free estimates

Small jobs welcome

"Mike was fantastic! The price for installation of recessed lighting was very fair. Mike took the time to go over what I wanted, gave me his feed back and was very professional. I was absolutely thrilled when the installation was complete. I would recommend A Shore Thing Electric to everyone I know. I would tell anyone looking to hire an electrician to call Mike first!!!!"
Pharmecutical Cage Panel
Panel Change
125 Amp Panel
Tesla S/X/3 Car Charger
Remote Controlled Ceiling Fan

+22

Response time1 day
5 neighbors recently requested a quote
Recommended by93%of homeowners
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Showing 1-10 of 111
Generator Install questions, answered by experts

The average cost to install a home generator is $5,200, but total costs can range from $500 to $18,000 or more. The final price depends on several factors, including the generator's size, type, brand, fuel source, and the cost of labor and assembly. The generator's size is the most significant cost factor, as units that can power larger homes with higher energy demands cost more.

Cost breakdowns by generator type are typically as follows:

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

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

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

To ensure you get the right size unit for your needs without overpaying, consider hiring an electrician to calculate the electrical load of your essential appliances. It is also recommended to get at least three quotes from qualified installers to find the best fit for your budget.

A 10,000-watt generator can run a small to mid-sized central AC unit (typically up to 3 tons or 36,000 BTU) along with a few other appliances. However, larger AC units or additional loads will require a bigger generator. Consult a local generator installer to ensure you add the correct size generator to your home.

Sizing a generator is a careful process that requires calculating the electrical load of your entire house. You have to take into account every device you want to use and their wattage requirements, plus the wattage needed to start them, and look for a generator that can safely run all that at around 80% capacity.

In more practical terms, a small home can run on a 10,000-watt generator (and if you only want to power a few key appliances, much less than that). A mid-sized home may need something between 15,000 and 22,000 watts. Larger homes require 25,000 watts or more. 

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.

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 Interlaken, NJ homeowners’ guide to generator installs

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