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Avatar for T K Lyden Electric & Generator, Inc.
T K Lyden Electric & Generator, Inc.
3.9(
114
)

Serving Oakham, MA and surrounding areas

Approved

In business since 1994

Free estimates

Emergency services offered

"The two young men who performed the installation were informative, professional, cordial, and they left the scene spotless. There was a technical problem with the engine on the generator itself, which they weren't able to help with, because they weren't licensed to work on the specific brand of generator. That might be something to check on before hiring for this type of job."
 Your standard 10 circuit
 Generac Whole House 20kW
 Mike and Will with a new 20kW
 Generac 20kW
 A

+45

Response time1 day
30 neighbors recently requested a quote
Recommended by91%of homeowners
L. Thomas McCaffrey
5.0(
23
)

Serving Oakham, MA and surrounding areas

Approved

In business since 2010

Free estimates

Customers say: Quality work

"I had a bathroom remodeled. The project started as a disaster. I had fired 2 contractors, lost money and time and really did not know where else to turn to. I was suggested to try Angie list, and so I did. I got in contact with Mr. Mc Caffrey, I did not have much faith however he surpassed and exceeded all my expectations. He was on time and showed up for work each single day he promised he would. The price was competitive and the bathroom was done in 10 days. The job included a jet tub,installation,plumbing, carpentry, electrical and tile work. I am greatly appreciative and will recommend Mr. Mc Caffrey at any time."
Response time4 hrs
4 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Joseph Gamache
Joseph Gamache
5.0(
23
)

Serving Oakham, MA and surrounding areas

Approved

In business since 2004

Free estimates

Credit card accepted

"Joe told me he would be at my house at a certain time and he was true to his word. He had to first remove a small wooden work bench —the wood pieces were put in a contractors garbage bag and removed to his truck— then he removed the old fuse box and put in the new circuit breaker. Joe finished the project and even swept the area and left it neat. It was a pleasure to have Joe do this job and I will happily recommend him for any electrical job you need. He is pleasant and curious."
Service upgrade
Living room lighting
Holden basement remodel
Remodeling - Kitchen & Bathroom Project
Service upgrade

+40

9 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Anderson DaSilva Electrician
Anderson DaSilva Electrician
4.9(
19
)

Serving Oakham, MA and surrounding areas

Approved

In business since 2015

Free estimates

Credit card accepted

"Anderson installed hard-wired smoke/carbon monoxide detectors on 3 floors in my moms house. He was prompt, professional and I would hire him again in an instant. We are very pleased with his work."
New Lighting
Full Kitchen Remodel
Full Kitchen Remodel
Full Kitchen Remodel
Full Kitchen Remodel

+10

14 neighbors recently requested a quote
Recommended by100%of homeowners
David M. Maynard
4.7(
16
)

Serving Oakham, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2010

Free estimates

Offers commercial services

"Dave, was professional and reliable. He did the job very well and returned when we had questions and resolved them. We upgraded our service from 100 to 200 amp electrical service. We also installed a charging port for our new electric car. We are very satisfied with the new service and charge station. I would highly recommend him to others."
Response time5 hrs
Recommended by50%of homeowners
...
Showing 1-10 of 234
Generator Install questions, answered by experts

Costs range from $500 to $2,500, depending on generator type and installation complexity.

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.

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.

An undersized whole-house generator has the potential to overheat and shut down when you try to run a central AC system. This scenario can not only damage the whole-house generator, but can also trip your home’s breakers or cause electrical damage. To avoid this situation, hire a local generator installer to correctly size your whole-house generator.

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.

The Oakham, MA homeowners’ guide to generator installs

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