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  • Average homeowner rating star icon4.8
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  • Verified reviews icon60
    Verified generator installs reviews

Find Generator install pros in Mountainside

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

Serving Mountainside, NJ and surrounding areas

Approved

In business since 2010

Free estimates

Warranties offered

"Since I am working at home it was needed. Glen and Chris were awesome to deal with as they walked us through the process step by step and every time they said someone would be here that person was. It was seamless and very easy to work with them and I would Highly recommend them if you are looking for a generator install."
Ruisi
Oceanport
Additional Photos
Additional Photos
Additional Photos

+55

Response time4 days
5 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Plesh Electric, LLC
Plesh Electric, LLC
4.4(
111
)
Fixed Generator - Install

Serving Mountainside, NJ and surrounding areas

Approved

In business since 1972

Free estimates

Emergency services offered

"Plesh electric did a fantastic job installing our whole house generator. We don’t have natural gas so we had to also had to have a propane tank installed. They did a great job organizing with the propane company and managing the township permits. I highly recommend them."
Outdoor Closed Panel Upgraded
Residential Generator
Outdoor Open Panel Upgraded
Residential Generator
Upgraded Panel Closed

+19

Response time2 days
9 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Pipe Works Services Inc
Pipe Works Services Inc
4.4(
202
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Mountainside, NJ and surrounding areas

Approved

Super Service Award Winner

In business since 2000

Free estimates

Emergency services offered

"I have used Pipe Works on numerous occasions as of this date and find them to provide excellent service at competitive prices. Their associates are great to work with and their prices are competitive. The work is always completed on time, as promised and the work area is left clean. I appreciate that they point out things that need repair in the not so distant future. It was great to wake up the other day with power coming from my new Kohler Generator"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+93

8 neighbors recently requested a quote
Recommended by79%of homeowners
Avatar for JDP Electric, LLC
JDP Electric, LLC
5.0(
14
)
Portable Generator - Install

Serving Mountainside, NJ and surrounding areas

Approved

In business since 2008

Emergency services offered

Warranties offered

"Jeff came out to to some repairs and install new outlets. While here he also installed a ceiling fan for me. Excellent work, reasonable price, cannot praise him or his work enough. Highly recommend!"
Chandelier
Recessed Lighting
Floor Lighting
Panel Upgrade
EV Car Charger

+11

Response time1 day
1 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Spartan Home Pros
Spartan Home Pros
5.0(
21
)
Portable Generator - Install

Serving Mountainside, NJ and surrounding areas

Approved

In business since 2023

Emergency services offered

Credit card accepted

Spartan Home Pros is a licensed electrical contracting company serving Central New Jersey. We specialize in residential electrical services including panel upgrades, new circuit installation, EV charger installation, electrical repairs, and diagnostics. Our team of experienced electricians is committed to delivering reliable, professional service with clear communication and attention to detail. We proudly serve homeowners across Middlesex, Somerset, Union, and Monmouth counties, and we stand behind our work with a dedication to customer satisfaction.

Service upgrades
Service upgrades
EV Charger Installation
Landscape lighting
Landscape lighting

+14

118 neighbors recently requested a quote
Recommended by66%of homeowners
Avatar for Transform Electric, LLC
Transform Electric, LLC
5.0(
14
)
Fixed Generator - InstallPortable Generator - Install

Serving Mountainside, NJ and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"Ken and his team from Transform Electric were terrific! Ken immediately contacted me and was able to come and give me an estimate right away. We started the project a few days later. I had four rooms that needed new recessed lighting installed. The team came on time and started working. They were very professional and reliable. They moved all my furniture and covered what was necessary. When it was all done, everything looked great and I was very pleased with the outcome. They also cleaned up after they completed the job. Overall they did a fantastic job and I would definitely recommend them to others!"
Recommended by92%of homeowners
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Showing 1-10 of 132
Generator Install questions, answered by experts

It’s usually better to repair your generator if it isn’t working properly, as it will typically be much more affordable and should yield similar results. Generator repairs cost around $300 on average, while installing a new whole-house generator costs around $5,000 on average. The only exception is if you know your generator is reaching the end of its useful life, usually between 30 and 40 years. If you have an older generator, you could face multiple repairs in the coming years, which might mean that a full replacement will be more cost-effective over time.

Here’s what you can run with different wattages and types of generators:

Portable generator:

  • 2,000 watts can handle a large appliance like a freezer or refrigerator, plus a few smaller items like phones or computer chargers. 

  • 4,000 watts will keep two large appliances operating and a few smaller devices.

  • 8,000 watts should power most essential appliances and other devices, including a sump pump, well pump, or your dishwasher.

Partial to whole-house generator:

  • 20,000 watts and above will make it seem like your home’s power is still on.

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.

If you have a transfer switch properly installed, the generator and main electrical power cannot feed the system at the same time. However, you should still shut off the power at your main circuit breaker panel before activating the generator. If you do that, you’ll simply need to shut off the generator and reset your circuit breaker once the local power comes back on.

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

The Mountainside, NJ homeowners’ guide to generator installs

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