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  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon16
    Verified generator installs reviews

Find Generator install pros in Barnstead

Avatar for Generator Supercenter of New Hampshire
Generator Supercenter of New Hampshire
5.0(
15
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+2 more

Serving Barnstead, NH and surrounding areas

Approved

In business since 2019

Free estimates

Emergency services offered

"Everyone should buy a generator from the Generator Supercenter of NH. Everything was seamless, from the sales visit to the installation. Their professional crews exceeded all expectations. I would highly recommend them."
Completed 22kW Generac Standby Home Generator Installation -  With GenMon MobileLink installed, our 24/7 monitoring program which includes annual maintenance!
Automatic Transfer Switch Installed - shown on the left with the customers electrical panel on the right.
Additional Photos
Additional Photos
Additional Photos

+5

Response time3 days
Response rate100%
10 neighbors recently requested a quote
Avatar for Pellerin Electric, LLC
Pellerin Electric, LLC
4.6(
84
)
Fixed Generator - InstallPortable Generator - Install

Serving Barnstead, NH and surrounding areas

Approved

In business since 2006

Free estimates

Warranties offered

"They attended my call immediately and shown up to do the job as per schedule. All services was ok. However it tooks them a week or so for sendind a correct bill and it was a little pricy Considering what was done."
3 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for Angell Electric
Angell Electric
5.0(
29
)
Portable Generator - Install

Serving Barnstead, NH and surrounding areas

Approved

In business since 2019

Credit card accepted

Offers commercial services

"We had an absolutely amazing experience with this father-and-son team! They own and operate their electrical company full time and also do furniture assembly, and we could not have been happier with the job they did for us. They arrived at 9:30 in the morning and stayed until around 6:30 that evening, making sure every single piece of furniture was completely assembled before they left. Everything came out beautifully, and they were incredibly hardworking, efficient, careful, and thorough. On top of that, they were both so friendly, personable, and pleasant to have around all day. Their pricing was also fantastic — by far the best of all the quotes we received. We were so impressed with their work and felt they deserved even more than what they had quoted us, so we were happy to tip them extra. We would 100% recommend them to anyone looking for reliable, skilled, hardworking people who genuinely care about doing a great job. We will be keeping their number for any future projects!"
Project Photos
1 neighbors recently requested a quote
Recommended by18%of homeowners
Avatar for Loyal Lab Electric & Generators
Loyal Lab Electric & Generators
5.0(
5
)
Fixed Generator - InstallFixed Generator - RepairPortable Generator - Install

Serving Barnstead, NH and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

Loyal Lab Electric & Generators is a locally owned electrical contractor serving Dover, Portsmouth, Rochester, and the NH Seacoast from our base in Somersworth, NH. Owner and NH Master Electrician Eric Hope has been in the trade since 2008 and founded this company in 2018. \n\nWe are an authorized Generac dealer with certified service technician's on staff, specializing in whole-home generator installation, electrical panel upgrades, EV charger installation, and electrical repairs. We serve residential customers across the NH Seacoast and southern Maine. NH Master Electrician License 13956. \n\nEvery job we complete donates to The Rusty Fund, supporting local dog rescues through our partnership with Pope Memorial Humane Society in Dover.

Past Projects
Past Projects
Past Projects
Past Projects
Past Projects

+13

26 neighbors recently requested a quote
Avatar for Electrical & Security Solutions, LLC
Electrical & Security Solutions, LLC
5.0(
13
)
Fixed Generator - InstallFixed Generator - Repair

Serving Barnstead, NH and surrounding areas

Approved

In business since 2018

Free estimates

Credit card accepted

"Tyler and his crew were amazing! Professional, on time, great communication, and the work is top notch! From first visit to get an estimate to cleaning up the job site, perfect! Thank you and highly recommend to anyone that is looking for electrical work!"
Landscape lighting
Landscape lighting
Landscape lighting
Landscape lighting
Landscape lighting

+10

Response time7 hrs
Response rate100%
7 neighbors recently requested a quote
Avatar for LaPlante Electric, Inc.
LaPlante Electric, Inc.
4.4(
71
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Barnstead, NH and surrounding areas

Approved

In business since 1991

Free estimates

Emergency services offered

"This was to install a standby generator. The advance planning was excellent as was the quality of the work. Customer service is outstanding. Price was high, however. LaPlante was the highest of 3 bids received. Nevertheless, I selected them because of their professionalism and customer service."
Whole House Generac Generator 22 Kilowatt (KW)
Top View of a 22 Kilowatt (KW) Generac Generator
Internals of 22 Kilowatt (KW) Generac Generator
Back of 22 Kilowatt (KW) Generac Generator
200 AMP Whole House Transfer Switch

+8

Response time3 days
68 neighbors recently requested a quote
Recommended by98%of homeowners
Angell Electric
5.0(
20
)
Portable Generator - Install

Serving Barnstead, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2019

Free estimates

Small jobs welcome

"We were very happy with the work.Eric was easy to work with. He installed a new 220 circuit and was able to fish it though the walls harmlessly whereas other electricians we talk with were going to tear up the drywall. Pricing was very reasonable. Highly recommend."
Response time2 days
8 neighbors recently requested a quote
Recommended by27%of homeowners
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Generator Install questions, answered by experts

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. 

Natural gas generators are designed to run for extended periods of time, such as power outages during a natural disaster. Since there’s no limit to the supply of natural gas, they don’t need to stop for refills. However, generators do need maintenance, including pauses to check and add oil. Constantly running them will also cause a lot more wear and tear, leading to a shorter lifespan.

Potential benefits of using a natural gas generator include reducing your carbon footprint, lower likelihood of carbon monoxide exposure, budget-friendly operating costs, and low-maintenance, continuous fuel supply. Some possible drawbacks, though, include higher initial installation costs, dependency on a natural gas supply, and installation complexity. Keep in mind that pros and cons will vary based on the type and brand of natural gas generator. 

While the rating will tell you how many watts the refrigerator needs at the peak of its cycle, it requires additional wattage to start. At the bare minimum, you’ll need a 1,500-watt generator to get the fridge up and running after a blackout. A 2,000-watt generator should be sufficient for most home refrigerators.

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 Barnstead, NH homeowners’ guide to generator installs

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