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  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon27
    Verified generator installs reviews

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

Avatar for Paul Foley Electric Co., Inc.
Paul Foley Electric Co., Inc.
4.7(
79
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Cohasset, MA and surrounding areas

Approved

In business since 1992

Free estimates

Emergency services offered

At Premier Energy Solutions, your comfort and safety come first. We protect your home or business with turnkey, worry-free generator installations, HVAC systems, and electrical work — all backed by unmatched reliability and value.\n\nEvery project is handled by licensed professionals using top installation practices. From backup power to heating and cooling to electrical upgrades, we make it seamless, professional, and built to last.\n\nSince 1992, Premier Energy Solutions has grown from a licensed electrical contractor into a full-service power, comfort, and safety provider. We deliver a complete, turnkey experience — design, permitting, installation, testing, and support.\nGenerators. HVAC. Electrical. One trusted team.

40 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Champion Electrical Services Inc
Champion Electrical Services Inc
5.0(
57
)
Fixed Generator - InstallPortable Generator - InstallGenerator - Install - For Business

Serving Cohasset, MA and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

At Champion Electrical Services, we believe homeowners deserve better. No more no-shows, rushed work, or upsells you don't need. We built this company to do things right - with respect, craftsmanship, and pride. Every project is treated like it's being done in our own home: clean, code-compliant, and built to last. Whether you need a panel upgrade, EV charger, generator, or quick repair, we show up when it counts and earn your trust every time. \nLicensed, insured, and proudly serving MA & RI. \nWhen the lights go out, don't call just anyone. Call the Champ. \n \n(774) 331-3500 \nCalltheChamp.com \[email protected]

Hotel 4Homeless Dogs
Pan Mass Challenge
Attleboro Cheer Team
The Autism Corner
Generac Generator

+3

184 neighbors recently requested a quote
Avatar for Zimbone Electrical Services
Zimbone Electrical Services
5.0(
18
)
Portable Generator - Install

Serving Cohasset, MA and surrounding areas

Approved

In business since 2014

Free estimates

Emergency services offered

"We originally hired Precision Electrical Services to fix faulty outlets and fuse box. We were impressed with their communication, professionalism, and quick scheduling that we hired them to install a ventilation / light fixture in our bathroom. I canâ t say enough good things about them and will use them for all of our electrical needs moving forward."
Response time6 hrs
Response rate94%
Recommended by83%of homeowners
Avatar for Daniel Cash Electrician
Daniel Cash Electrician
4.6(
39
)
Portable Generator - Install

Serving Cohasset, MA and surrounding areas

Approved

In business since 2014

Free estimates

Warranties offered

"Came on time. Checked out the electrical problem with our clothes dryer and gave me an estimate. He went right to Home Depot to get new wiring and came right back and fixed the problem. Excellent service and will use him again."
Service Upgrades
Service Upgrades
Service Upgrades
Service Upgrades
Interior Lighting

+18

Recommended by83%of homeowners
Avatar for Services & More LLC
Services & More LLC
4.8(
31
)
Portable Generator - Repair

Serving Cohasset, MA and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"Adam and his team are so kind, professional and do a fantastic job every trip. I am on the biweekly rotation and with how great my grass is doing if I ever move im going to check if they service my area before I go. The first time they came my grass was super overgrown and they explained to me clearly what their gameplay was then and asked me what I wanted with the space. I will recommend them to anyone who asks."
Furniture Assembly
Bathroom Remodel
Bathroom Remodel
Bathroom Remodel
Bathroom Remodel

+4

23 neighbors recently requested a quote
Avatar for Cotti-Johnson Heating-Cooling-Plumbing-Electrical MA
Cotti-Johnson Heating-Cooling-Plumbing-Electrical MA
4.6(
231
)
Fixed Generator - InstallPortable Generator - Install

Serving Cohasset, MA and surrounding areas

Approved (Corporate)

In business since 1944

Free estimates

Emergency services offered

"Tim P, Generator Advisor, visited our house and gave on the spot estimatesâ ¦..he was GREAT. Licensed Electrician who knew his business and was easy to speak with. Timely communications and responses to text messages! Tim was helpful answering questions after the generator was installed. We talked to 5 Generac dealers and a Kohler dealer. Cotti-Johnson had the best pricing in the South Shore area. We highly recommend this company. If you are thinking about buying a standby generator, Cotti Johnson is the company to callâ ¦..Art V"
Home Standby Generator Installation
Home Standby Generator Installation
Home Standby Generator Installation
Home Standby Generator Installation
Home Standby Generator Installation

+56

Response time9 hrs
Response rate97%
83 neighbors recently requested a quote
Avatar for John S. Morahan Electrician, LLC
John S. Morahan Electrician, LLC
5.0(
9
)
Portable Generator - Install

Serving Cohasset, MA and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

"John came when he said he would. Very professional and polite. One of my best experiences working with a contractor. Took care of my issues. Upgraded my electrical panel as needed. Installed transfer switch and equipment as needed for backup generator. Gave a very reasonable price. Highly recommend."
Response time3 hrs
3 neighbors recently requested a quote
Recommended by77%of homeowners
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Generator Install FAQs, answered by experts

Yes, in some locations, it is required by the National Electric Code (NEC) to have a transfer switch installed for electrical emergencies. In addition to following electrical code, generator transfer switches ensure your home is fully protected during a power outage. By switching the power from the main breaker to the generator breaker, you can seamlessly operate your HVAC, lights, appliances, devices, and more during an emergency. 

While diesel is relatively stable, it won’t last nearly as long as propane and you may have to replace it if it sits unused for too long. Diesel can sometimes struggle to work efficiently or start engines during especially cold weather, so it’s not the best choice for every climate. Compared to fuels like propane and natural gas, diesel generators tend to be noisier and create more exhaust, which isn’t always ideal for home use.

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.

Generally, you’ll want to keep between 60 and 70 feet between the generator and the transfer switch. There are a few reasons for this, including:

  • The distance reduces the noise coming from the generator into your home.

  • It increases efficiency because you won’t have a voltage drop from this short of a distance.

  • Prevents carbon monoxide poisoning: keep at least 15 feet between your generator and an open window. 

Generators are usually sized by running watts and starting watts. Ideally, you’ll want a generator that can offer both the necessary running watts and starting watts for everything you need to power without going beyond 90% of its capacity. Calculate your home’s electrical load based on the breakers in your home or adding up the appliance and lighting needs of connected rooms.

The Cohasset, MA homeowners’ guide to generator installs

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