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Avatar for Generator Supercenter of Maine
Generator Supercenter of Maine
4.6(
39
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Lisbon, 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%
91 neighbors recently requested a quote
Generators of Maine, Inc.
5.0(
5
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Lisbon, 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 by100%of homeowners
Avatar for Casco Bay Generators LLC
Casco Bay Generators LLC
5.0(
5
)
Fixed Generator - InstallFixed Generator - Repair

Serving Lisbon, 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%
16 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 Lisbon, ME and surrounding areas

Approved

Super Service Award Winner

In business since 2022

Free estimates

Warranties offered

"I hired this company to do electrical run from my house to my shed. I was so impressed with their work and then reasonable price for the work they did. I had another problem with electric in my kitchen. I called them to come and fix it which they did in a short amount of time for a reasonable price. I would call them anytime."
Completed system
First half of panels
First half progress
Response time2 days
Response rate99%
25 neighbors recently requested a quote
Avatar for Veteran Wire Electric LLC
Veteran Wire Electric LLC
5.0(
5
)
Fixed Generator - InstallGenerator - Install - For BusinessGenerator - Repair - For Business

Serving Lisbon, ME and surrounding areas

Approved

In business since 2024

Credit card accepted

VETERAN WIRE ELECTRIC LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

Panel
12 neighbors recently requested a quote
Avatar for Wired For Creation
Wired For Creation
5.0(
6
)
Portable Generator - Install

Serving Lisbon, ME and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Warranties offered

"I’m a contractor that was doing a basement build for a customer and we needed to add a bunch of outlets, lights(dimmers), generator hook up and add a sub panel. The work was done on time and with a lot of care. Matt was great to work with and awesome communication throughout the project would highly recommend him for any project!!"
Response time12 hrs
Response rate91%
Showing 1-10 of 40
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.

These advanced generators use a key fob or a smartphone app to remotely start, which is ideal for getting power back on immediately without venturing outside. This feature is more common on whole home generators, but you may be able to find it on large portable generators, too.

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

Most homeowners won't be able to claim a home generator as a tax write-off. However, a whole-house generator may be tax-deductible in certain situations depending on its purpose. For instance, if it's needed to power essential medical equipment, it may qualify as a medical expense deduction. Also, in some cases, businesses can deduct a generator as a business expense if it supports operations. Always consult a tax professional to determine eligibility based on your specific circumstances and the applicable IRS regulations.

Generators are usually sized by running watts and starting watts. Ideally, you’ll want a generator that can offer both the necessary running watts and starting watts for everything you need to power without going beyond 90% of its capacity. Calculate your home’s electrical load based on the breakers in your home or adding up the appliance and lighting needs of connected rooms.

The Lisbon, ME homeowners’ guide to generator installs

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