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TRUSTED BY MIDDLETON, MA HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon12
    Verified generator installs reviews

Find Generator install pros in Middleton

Avatar for JP McCurdy Electrical Services Inc
JP McCurdy Electrical Services Inc
4.4(
526
)

Serving Middleton, MA and surrounding areas

Approved

In business since 1999

Free estimates

Emergency services offered

"I should have asked the cost before having the work done as I was surprised that it was $400. to have them installed which was double the cost of the actual fans. Otherwise everything else was perfect."
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+9

1 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Moses Electric Inc
Moses Electric Inc
5.0(
11
)

Serving Middleton, MA and surrounding areas

Approved

In business since 2011

Emergency services offered

Customers say: True professional

"Scott did an excellent job for us. We needed an EV charger installed and a few other things done. He came by, sized up the job and gave us an estimate. In a few days he showed up ready work. He installed the EV charger, re[laced 4 thrmostats, and fixed a doorbell. All went well. His price was reasonable. He worked quickly and efficiently and got everytjing right the first time. I highly recommenr Moses Electric and would glady hire Scott for future electrical jobs."
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+1

14 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for NETR Inc
NETR Inc
4.7(
78
)

Serving Middleton, MA and surrounding areas

Approved (Corporate)

In business since 1989

Free estimates

Emergency services offered

"NETR always provides top notch service and knowledge. I have used them for both installation of a mini split as well as ongoing maintenance and service. Highly recommend them."
SOUTH END CONDO RECEIVES MITSUBISHI DUCTLESS SYSTEM
SOUTH END CONDO RECEIVES MITSUBISHI DUCTLESS SYSTEM
SOUTH END CONDO RECEIVES MITSUBISHI DUCTLESS SYSTEM
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+9

24 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Stevens Electric, LLC
Stevens Electric, LLC
5.0(
12
)

Serving Middleton, MA and surrounding areas

Approved

In business since 2019

Free estimates

Customers say: Quality work

Stevens Electric, LLC, is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers interests, and make their concerns the basis of our business.

Response time4 hrs
13 neighbors recently requested a quote
Recommended by83%of homeowners
Avatar for Heritage Home Service
Heritage Home Service
4.1(
1,316
)

Serving Middleton, MA and surrounding areas

Approved (Corporate)

In business since 1988

Free estimates

Emergency services offered

"Excellent service! My new boiler was installed at the start of heat season and worked so efficiently this winter. Heritage worked with me throughout the install and follow up service process. I highly recommend them."
Career fair
Team breakfast
Festivals and events
Golf tournament
Heritage Helps initiatives

+27

Recommended by91%of homeowners
Avatar for J M Electrical Company, Inc.
J M Electrical Company, Inc.
5.0(
4
)

Serving Middleton, MA and surrounding areas

Approved

In business since 1985

Free estimates

Emergency services offered

With 35+ years of 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 welcome your questions and thank you for your interest.

Response time9 hrs
Response rate97%
11 neighbors recently requested a quote
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Generator Install questions, answered by experts

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. 

Whole-house generators need to be installed on level ground several feet away from walls and other objects. Because they tap into the electrical system directly, they usually need to be close to your home electrical panel for a transfer switch installation. It also helps with installation if they are near to a gas line or propane tank installation.

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.

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.

Portable generators provide backup power for essential appliances during outages and are easy to relocate.

The Middleton, MA homeowners’ guide to generator installs

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