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Best generator install pros near Lewiston, ME

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Top-Rated Generator install pros in Lewiston - Updated Nov 2026

Avatar for Generator Supercenter of Maine
Generator Supercenter of Maine
4.6(
40
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Lewiston, ME and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"Diagnosed the problem and repaired my generator so it starts and runs well. I will be using them from now on for all of my generator service in the future. They are a first class company."
Generator Install
18KW Installation
Preparation for the day
Photos
Response time2 days
Response rate100%
55 neighbors recently requested a quote
Generators of Maine, Inc.
5.0(
6
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Lewiston, ME and surrounding areas

Approved

In business since 2014

Free estimates

Offers commercial services

"Generators of Maine just completed the installation of a 14kw generator with parallel transfer switches, to protect 2 separate metered panels at a rental property that I own. I didn't even know that this was possible, until Doug Sawyer suggested it. The incremental cost of protecting the additional panel with the parallel transfer switch arrangement was a fraction the cost of an additional generator and transfer switch. Throughout the job, Doug and his crew were awesome. I am a terrible snoop who enjoys technology, so I hung around just watching and learning. They didn't seem to mind my presence and were friendly and informative through out the install. Every aspect of the job was 100% top-notch. Doug also managed to under bid his nearest competitor on every component and aspect of the job, including the annual maintenance contract, which I deemed to be worth the $$$. I highly recommend Generators of Maine."
Response time4 hrs
Recommended by80%of homeowners
Avatar for Parker Electric LLC
Parker Electric LLC
5.0(
14
)
Fixed Generator - InstallPortable Generator - InstallFixed Generator - Repair+2 more

Serving Lewiston, ME and surrounding areas

Approved

Super Service Award Winner

In business since 2025

Free estimates

Small jobs welcome

"Noah exceeded my expectations at a competitive price . Clear communication, and fast! His estimate was spot on and it was clean and professional work. Noah did a 60amp sub panel install for my new garage, and also wired in four new outlets in my basement as I only had one down there. Thanks Noah, I recommend him to family and friends every chance I get and I always get positive feedback from the recommendation"
Generator Install
Response time9 hrs
Response rate93%
10 neighbors recently requested a quote
Avatar for IQ Electric
IQ Electric
5.0(
14
)
Portable Generator - Install

Serving Lewiston, ME and surrounding areas

Approved

In business since 2018

Free estimates

Small jobs welcome

"Adam is such a great electrician. His workmanship is flawless, and his ability to troubleshoot a situation is incredible. His range of abilities allows you to hire him for any job. He installed 15-20 recessed lights in my house, as well dozens of new switches and outlets, an electric wall heater, and even two brand new complete electrical panels (two family home). His pre-work consultation was spot on; there were no surprises. If you want a company that truly offers Integrity and Quality in their work, call IQ Electric."
Pendent Light
Ceiling Fixture
Reay Fun... and Bizzare?
Family Room Lighting Project
Backlit Decora Switches

+2

Response time6 hrs
Response rate95%
Recommended by83%of homeowners
Avatar for Casco Bay Generators LLC
Casco Bay Generators LLC
5.0(
5
)
Fixed Generator - InstallFixed Generator - Repair

Serving Lewiston, ME and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

We are proud to be a Veteran-operated, Titanium Level Kohler® licensed and insured generator dealer. We teamed with Kohler® to give you peace of mind that you are working with a dealer-trained, factory-authorized provider to handle these appliances. We offer all Kohler® and Generac warranties and maintenance services. These are the industry’s best products for backup protection at your home or office.\nWe are also proud to work with Efficiency Maine, offering discounts, rebates, loans, and other initiatives to promote high-efficiency equipment that help Maine’s homes and businesses reduce their energy costs and lower their greenhouse gas emissions.\nProfessionally installing a standby generator and/or heat pump for your home or business is one of the best investments you can make. .\nWe at Casco Bay Generators & Heat Pumps keep the power on 24 hours a day, 365 days a year.

Standard installation.
Response time2 days
Response rate92%
13 neighbors recently requested a quote
Avatar for Origin Energy, LLC
Origin Energy, LLC
4.6(
11
)
Fixed Generator - InstallPortable Generator - InstallGenerator - Install - For Business

Serving Lewiston, ME and surrounding areas

Approved

Super Service Award Winner

In business since 2022

Free estimates

Warranties offered

"“I had an exceptional experience working with Origin Energy. Their team demonstrates the highest level of professionalism and a strong work ethic. They are not only knowledgeable and efficient but also consistently go above and beyond to ensure customer satisfaction. Every interaction was seamless, and their dedication to providing quality service was evident at every step. I highly recommend Origin Energy for their reliable, hardworking, and professional approach to business!”"
Completed system
First half of panels
First half progress
Response time2 days
Response rate99%
13 neighbors recently requested a quote
Avenergy Electric
4.0(
33
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Install

Serving Lewiston, ME and surrounding areas

Approved

In business since 2009

Credit card accepted

Offers commercial services

"Josh is fair and very responsive with his crew of interchangeable professionals who are prompt and professional. My project was a huge undertaking across four apartments involving exterior panel installations and a complete rewiring of the entire building. I worked with about 6 of his crew members spanning months without any meaningful complaint and would depend on them for all my future electrical endeavors. His pricing is very fair for the quality of work you get."
Response time11 hrs
1 neighbors recently requested a quote
Recommended by96%of homeowners
Showing 1-10 of 48
Generator Install FAQs, answered by experts

Yes, in most municipalities, you will need a permit to install a permanent home generator, including emergency backup, partial-home, and whole-home models. Because these installations involve significant alterations to your home's electrical system and produce exhaust fumes, local governments often require a permit or inspection for safety purposes. A generator permit typically costs between $50 and $250, depending on your location. Your electrician or certified installer can usually handle the permitting process for you, but you will be responsible for the cost. It's a good practice to confirm with your installer that they will pull all necessary permits before work begins.

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. 

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.

Natural gas and electricity rates vary significantly based on location, and pricing can change over time, too. It’s possible that in locations where natural gas is particularly inexpensive, it will cost less than grid-based electricity will. However, you should also factor in the generator’s initial costs and maintenance needs, as well as its noise level and if it can comfortably power all your home appliances.

Homeowners can often access federal tax credits, such as the Investment Tax Credit (ITC), which covers a percentage of installation costs. Many states and utilities offer additional rebates, grants, or performance-based incentives. These programs can significantly lower your upfront investment. Check the Database of State Incentives for Renewables and Efficiency (DSIRE) or contact your local energy office for current offers.

The Lewiston, ME homeowners’ guide to generator installs

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