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Verified Reviews for Generator Install pros in Marlow, NH

*The Angi rating for Generator Install companies in Marlow, 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 Marlow, 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 March 31, 2026

Find Generator install pros in Marlow

Avatar for Noyes Electric
Noyes Electric
5.0(
30
)
Fixed Generator - InstallPortable Generator - InstallGenerator - Install - For Business+1 more

Serving Marlow, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2022

Free estimates

Offers commercial services

"Installed an exterior generator hookup with auxiliary breaker box. John was excellent and the install looks and works great. He stayed late to troubleshoot an issue and was very gracious with his time. I would definitely hire him again!"
Response time1 day
Response rate93%
29 neighbors recently requested a quote
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Avatar for Pellerin Electric, LLC
Pellerin Electric, LLC
4.6(
84
)
Fixed Generator - InstallPortable Generator - Install

Serving Marlow, NH and surrounding areas

Approved

In business since 2006

Free estimates

Warranties offered

"Upgraded the service to the house, grounds, new/larger primary panel, sub-panel installed in garage, exterior generator wired. Very neat/clean work, very quick. Very happy."
5 neighbors recently requested a quote
Recommended by98%of homeowners
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Avatar for Let It Glow Electric, LLC
Let It Glow Electric, LLC
4.6(
32
)
Portable Generator - Install

Serving Marlow, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2018

Free estimates

Emergency services offered

"The owner was friendly,knowledgeable, listen to your issues, help decide the right choice action. Then exe used the action which included a new breaker box and generator hook-up. Very neat job, do e right and fast."
Exterior
Kitchen
Main service
Transfer switch and main panel
Canopy recessed cans retrofit

+27

Response time1 day
2 neighbors recently requested a quote
Recommended by76%of homeowners
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Avatar for Fournier’s Home Services
Fournier’s Home Services
4.5(
8
)
Portable Generator - Repair

Serving Marlow, NH and surrounding areas

Approved

Free estimates

Credit card accepted

"Tristan built a playhouse in the backyard from our basic sketch. He thought of things we wouldn’t have even considered and brought our idea to life. The kids love it and we are very impressed!"
10 neighbors recently requested a quote
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Avatar for Brens Electric LLC
Brens Electric LLC
5.0(
1
)
Generator - Install - For BusinessPortable Generator - Install

Serving Marlow, NH and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

We bring years of proven experience and a strong work ethic to every project we undertake. As a fully licensed and insured electrical contractor, we combine technical expertise, attention to detail, and strict compliance with all applicable electrical codes and safety standards. Our work is performed with professionalism, precision, and accountability. Whether managing complex electrical systems or providing routine maintenance, every task is completed with a focus on quality, reliability, and long-term performance. Our goal is to build lasting relationships built on trust, consistency, and exceptional service.\n

800A Service Upgrade
800A Service Upgrade
6 neighbors recently requested a quote
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Levi Electric
New to Angi
Portable Generator - Repair

Serving Marlow, NH and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

Levi is a Master Electrician with over 10 years of experience in the electrical trade. He has primarily worked in high-end residential and custom homes, bringing strong expertise in electrical layout, lighting design, and coordination with insulation and building systems. Levi is highly knowledgeable in all aspects of residential electrical work, from rough-in to finish, and is committed to safe, code-compliant, and high-quality installations.

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Avatar for Abracadabra Electric
Abracadabra Electric
4.5(
11
)
Portable Generator - Install

Serving Marlow, NH and surrounding areas

In business since 2012

Free estimates

Credit card accepted

"Steven has done a service entrance panel upgrade, installed ceiling and bathroom fans and did hardwired smoke detectors for me. He's very professional, responsible and brings in a fellow Master Electrician for the larger jobs. Steven's estimates are also very competitive."
Insufficient Bonding at Water Meter
Incorrect terminations
Improper terminations of Grounds and Neutral
Existing disconnect
The existing service was not properly grounded

+17

Response time2 days
Recommended by100%of homeowners
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CDS Unlimited
5.0(
9
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Marlow, NH and surrounding areas

In business since 2020

Free estimates

Credit card accepted

"CDS Unlimited (Jordan and Noah) installed a generator interlock in my electrical panel. They were on time, very professional, and did a nice clean installation routing the wiring and installing the new receptacle. I would not hesitate to hire them again for any future electrical projects."
Response time1 day
Recommended by100%of homeowners
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Showing 1-10 of 38
Generator Install questions, answered by experts

Generators run on a variety of fuel types, ranging from natural gas to solar power. Keep in mind that fuel costs varying by type:

  • Natural gas: $2,000–$21,000 per year 

  • Liquid propane: $2,000–$21,000 per year

  • Diesel: $3,000–$20,000 per year

  • Gasoline: $500–$3,000 per year

  • Solar generator: $2,000–$25,000 per unit

  • Battery backup: $10,000–$25,000 per unit

A portable generator can supply power to selected appliances and circuits in a home, but it's generally not designed to handle the entire household's electrical needs simultaneously. Portable generators have limited wattage capacity, so they are only designed to power essential devices and electronics temporarily until local power is restored. If your power needs outweigh the capabilities of a portable generator, consider installing a whole-home generator instead.

It is safe to run a generator continuously, but you must follow safety protocols to ensure personal and home safety. Read the manufacturer’s instructions for specific recommendations, but the general recommendation is to turn generators off overnight or when you’re away from the house. Overworked generators can pose a fire hazard and if your generator is not in a well-ventilated area, running it continuously could lead to carbon monoxide poisoning.

It might seem counterintuitive, but installing a generator transfer switch will save you money in the long run. While you’ll have to pay between $400 and $2,500 to have the transfer switch installed, you’ll recoup that amount later on when you don’t have to pay for expensive repairs to your appliances, devices, and electrical system that may have burned out, overloaded, or stopped working due to a sudden loss of power or an incorrect hook up of a generator to your home. 

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 Marlow, 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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