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Avatar for Electrical & Security Solutions, LLC
Electrical & Security Solutions, LLC
5.0(
13
)
Fixed Generator - InstallFixed Generator - Repair

Serving Warren, 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%
15 neighbors recently requested a quote
Richard Hebert Master Electrician
5.0(
1
)
Fixed Generator - InstallPortable Generator - Install

Serving Warren, NH and surrounding areas

Approved

In business since 2020

Credit card accepted

Offers commercial services

We can take on a wide range of residential and commercial electrical projects to include full installation for additions and remodels as well as wiring/panel upgrades, and a variety of other projects. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

1 neighbors recently requested a quote
Avatar for SW WOOD LLC
SW WOOD LLC
5.0(
1
)
Portable Generator - InstallPortable Generator - Repair

Serving Warren, 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 ."
9 neighbors recently requested a quote
Avatar for Fralick and Sons Electrical Services, LLC
Fralick and Sons Electrical Services, LLC
5.0(
30
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Warren, NH and surrounding areas

In business since 2020

Free estimates

Emergency services offered

"This was quick, efficient, easy, and effective. Less than a week between calling and getting my L2 charger installed. They were helpful in explaining what they were doing and what needed to be done, and explaining another issue I asked about. They were friendly to boot!"
Response time1 day
Recommended by100%of homeowners
Avatar for JM Electric LLC
JM Electric LLC
4.5(
26
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Warren, NH and surrounding areas

In business since 1989

Free estimates

Emergency services offered

"The basic job was swapping out old florescents with LED bulbs, but they had to reroute one circuit that had been tripped. This was difficult but they reworked the circuit and we now have great lighting and all the circuits are working as they should. The guys were excellent and did a great job."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+15

Recommended by100%of homeowners
Avatar for Vermont Generator Systems
Vermont Generator Systems
5.0(
1
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Warren, NH and surrounding areas

In business since 2008

Free estimates

Emergency services offered

Since 2004, Vermont Generator Systems has proudly supported the backup power needs of homes and businesses across parts of Vermont and New Hampshire. Our experienced team is with you every step of the way, from the initial site assessment to professional installation and ongoing maintenance. VGS has deep expertise in installing and servicing Generac generator systems.

Check out our Generic Generator Installations!
A collage of recent Generator Installations!
Response time6 hrs
Response rate100%
16 neighbors recently requested a quote
NH Generator Installers, Inc.
New to Angi
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Warren, NH and surrounding areas

In business since 2009

Free estimates

Credit card accepted

About NH Generator Installers (formerly Corr & Son's Electric) - Concord, NH\n\nNH Generator Installers is a team of motivated team members dedicated to providing top-quality power generator installations at competitive prices, including home generators and commercial electric generators. We are a professional, reliable, hard working generator distribution and installation company that takes pride in completing all jobs accurately and in a timely manner. \n\nWe are committed to establishing long lasting relationships with our customers by exceeding expectations, gaining trust through exceptional performance, unparalleled service, and honest and ethical business practices. We recognize that teamwork is essential in order to achieve successful project completion.\n

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Generator Install questions, answered by experts

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.

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

A 1,500 square foot home will likely need a 15kW to 20kW generator. When deciding on whole-house generator size, add up the total wattage of the devices that you’d like to continue running during a power outage. That way, you can ensure you purchase a generator that can power your necessary appliances or medical equipment during an electrical emergency.

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 cost to install a whole-house generator averages $5,200, with a typical price range of $1,500 to $8,900. However, total costs can vary from $400 for a small portable unit to over $18,000 for a large-capacity system. The most significant cost factor is the generator's size and capacity, but other variables include the brand, fuel type, and labor for assembly and installation.

Generator costs can be broken down by type:

  • Portable or Emergency Backup Generators (1kW–7.5kW): $500 to $2,000

  • Partial-Home Generators (9kW–20kW): $2,000 to $6,500

  • Whole-House Generators (22kW–48kW): $5,000 to $18,000

To avoid paying for more power than you need, consider hiring an electrician to calculate the electrical load for your essential appliances. It is also recommended to get at least three quotes to find the best deal for your specific needs and budget.

The Warren, NH homeowners’ guide to generator installs

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