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Verified Reviews for Generator Install pros in Berlin, NH

*The Angi rating for Generator Install companies in Berlin, NH is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.

*The HomeAdvisor rating for Generator Install companies in Berlin, NH is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.

Last update on April 20, 2026

Find Generator install pros in Berlin

Avatar for Evan Jones- Master Electrician, LLC
Evan Jones- Master Electrician, LLC
4.0(
22
)
Portable Generator - Install

Serving Berlin, NH and surrounding areas

Approved

In business since 2004

Free estimates

Small jobs welcome

"Excellent customer service from start to finish. Electrician Eric and technician Johnathan were very professional and did an outstanding job. Nice to see young men practicing their trade so well. Highly recommend them without any reservations. Satisfied customer."
Response time3 days
Recommended by88%of homeowners
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Avatar for SW WOOD LLC
SW WOOD LLC
5.0(
1
)
Portable Generator - InstallPortable Generator - Repair

Serving Berlin, NH and surrounding areas

Approved

Free estimates

Emergency services offered

Small jobs welcome

"I was very pleased with the work he did, he has a nice way of explaining things , I sure I will hire him again for other projects when needed he is a very pleasant person to deal with. Tank you Scott for being such a nice guy ."
14 neighbors recently requested a quote
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Avatar for Power Moves Electric, LLC
Power Moves Electric, LLC
5.0(
11
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Berlin, NH and surrounding areas

Emergency services offered

"From the very beginning to the end the experience was exceptionally good. The price was great, professionalism top-notch and the work was extremely high-quality. We knew exactly what to expect along the way and I would recommend them to anyone."
Recommended by100%of homeowners
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Avatar for K & J Electric LLC
K & J Electric LLC
New to Angi
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Berlin, NH and surrounding areas

In business since 2017

Free estimates

Small jobs welcome

K & J Electric is owned and operated by Kevin Walker, Master Electrician. We proudly handle both residential and commercial electrical work, and no job is too big or too small. Whether it’s new construction, renovations, or upgrades to an older property, we complete every project neatly, safely, and on schedule.\n\nEstimates are always free — call Kevin today to discuss your project.

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Avatar for FNS Electrical Services
FNS Electrical Services
New to Angi
Fixed Generator - InstallGenerator - Install - For Business

Serving Berlin, NH and surrounding areas

In business since 2023

Free estimates

Offers commercial services

I am upfront and honest worker that treats people the way I want to be treated. I believe in working with people and keeping them informed every step of the way. Quality takes priority, either a job is done right or it's not worth doing at all. I don't guarantee the cheapest price, but a great value and peace of mind.\n

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Avatar for Chris Fagnant Electrical and Construction
Chris Fagnant Electrical and Construction
New to Angi
Portable Generator - Repair

Serving Berlin, NH and surrounding areas

Free estimates

Emergency services offered

Small jobs welcome

General Construction, Remodeling, Electrical Service updates, New Constructions and Additions, landscaping and Handyman services, I work with clients to bring their vision to life. Fully insured and licensed in Multiple states, with over 26 years in the trades, an extensive knowledge of building codes with an emphasis on construction inspections and safety my goal is to provide craftsmanship and quality in a timely manner.

Dining Room
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Generator Install questions, answered by experts

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.

Yes, natural gas generators can work without electricity. Natural gas generators are a common type of backup or whole-house generator that operates when the electrical grid isn’t working. The trick is using a transfer switch (which usually needs to be installed with the generator) that safely switches the home electrical system from the power grid to generator power when needed.

The amount of time a standby generator can run continuously is around 3,000 hours on average. However, standby generators can generally run indefinitely as long as they have a continuous fuel supply. Generators hooked up to a home’s natural gas supply are the best option for extended usage, as these won’t rely on a finite fuel supply based on how much you have in storage. Generators running on liquid propane or diesel won’t last as long, as these require fuel storage and regular refueling to stay running.

In some situations, yes. Never try to put biofuel into any home generator without checking the specifics first. If a generator has the ability to run on diesel, it can also run pure biofuel (the clear kind made from seed oils, for example). But if you are using biofuel made from animal fats or vegetable oils, the generator will need significant modifications before it can handle a sludgier type of biofuel.

Yes, installing a generator usually increases your property value because buyers are getting the added peace of mind knowing they’ll be able to maintain power through blackouts. In most cases, you should see close to a 100% return on investment (ROI). Keep in mind that home generators usually need a permanent foundation, and installing a concrete slab will likely raise your property taxes slightly.

The Berlin, NH homeowners’ guide to generator installs

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

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