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Avatar for R A Buckley & Son Electrical Contractors, LLC
R A Buckley & Son Electrical Contractors, LLC
4.8(
49
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Manchester, CT and surrounding areas

Approved

Super Service Award Winner

In business since 2000

Free estimates

Offers commercial services

"Highly recommend contacting them for electrical work! Responded quickly to come and give a quote for a generator hook up. Explained everything thoroughly and gave helpful suggestions as this was my first experience getting a generator to power the house. Very reasonable pricing. From first contact to getting it installed in under 2 weeks. Very happy!!"
Response time5 hrs
Response rate90%
4 neighbors recently requested a quote
Avatar for TJF Electric LLC
TJF Electric LLC
5.0(
18
)
Fixed Generator - InstallFixed Generator - RepairPortable Generator - Install+1 more

Serving Manchester, CT and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

"It is rare these day to find an electrical company owner who actually cares about his customers. Tyler is very personable and wants to truly get to know his clients. A++ In customer service. He replaced out 12 circuit electrical panel which was basically rats nest of electrical wires. This was very time consuming for him while Chris worked on moving and installing a new electrical meter. I would highly recommend TJF electrical for any of your electrical needs whether the Job is big or small! He also is available 24/7. Meet Tyler for yourself a see the customer service that he has brought to his business. Thank you Tyler for taking care of our electrical Needs!"
recessed lights
recessed lights
recessed lights
recessed lights
Avatar for Onlehane, LLC
Onlehane, LLC
4.8(
10
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Manchester, CT and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

OnLehane Electric is your one stop generator maintenance and repair center! With over 15 years of electrical experience we are here to help you out with all of your generator upkeep and issues. Fully licensed, insured, and certified reach out today and never worry about your generator failing again!

Industrial Solar Project
Residental Generator Install
Residental Generator Install
Commercial Solar Project
Kitchen Remodel

+10

Response time1 day
Response rate95%
Recommended by100%of homeowners
Avatar for Tradesmen Energy Solutions LLC
Tradesmen Energy Solutions LLC
5.0(
9
)
Generator - Install - For Business

Serving Manchester, CT and surrounding areas

Approved

In business since 2022

Free estimates

Credit card accepted

With several years experience, we work hard to bring each customer the best possible service and quality available. We look forward to working with you on your next project. We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer’s needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job. We welcome your questions and thank you for your interest. Call today!

Bedroom Lighting upgrade
Bedroom Lighting upgrade
My jobs
My jobs
My jobs

+10

5 neighbors recently requested a quote
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Generator Install questions, answered by experts

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. 

While natural gas generators are costly, they’re a great option for standby power due to the reliability of natural gas as a fuel source. Unlike other fuels, natural gas is delivered through underground pipes, making outages extremely rare and less likely to be affected by the elements. As long as the area isn’t prone to earthquakes, they offer an unlimited supply of natural gas that doesn’t degrade over time or require storage in tanks.

To determine the right size generator for your house, you should calculate the total wattage of the appliances and devices you want to power during an outage. List all essential items, note their start-up wattages, and add them together.

Here are some typical wattage requirements for common appliances:

  • Refrigerator: 600 watts

  • Large dehumidifier: 700 watts

  • Large window air conditioner: 1,400 watts

  • Water heater: 3,000 to 4,500 watts

  • Electric furnace: 5,000 to 25,000 watts

A 7,500-watt generator might be sufficient for essentials like a refrigerator, freezer, well pump, and lighting circuits. However, for high-demand items like a water heater or furnace, a whole-home generator is a better choice. A portable generator may be enough if you only need to power a few critical items.

While home square footage can offer a rough estimate, it is not always a reliable indicator. For reference, here are some typical generator sizes based on square footage:

  • 1,000 sq ft: 6–9 kW

  • 1,500 sq ft: 7–10 kW

  • 2,000 sq ft: 10–14 kW

  • 2,500 sq ft: 12–16 kW

  • 3,000 sq ft: 16–20 kW+

For the most accurate sizing, consult a professional who can calculate your home's peak and average power consumption and recommend the optimal generator.

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

Carbon monoxide emissions aren’t only dangerous to human life, but they also harm our planet. While natural gas generators emit lower levels of CO than other fuel sources, there are still ways to reduce emission levels. For example, shop around for an eco-friendly generator that complies with current emission standards. Also, make sure your generator is serviced regularly to avoid CO buildup. 

The Manchester, CT homeowners’ guide to generator installs

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