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

Serving New Gloucester, ME and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"I got an estimate from another company, but once they place the generator I then needed to contact someone else to connect it to my gas line. Generator Supercenter completed everything. Plus, they contacted the gas company to schedule replacement of my old meter."
Generator Install
18KW Installation
Preparation for the day
Photos
Response time2 days
Response rate100%
97 neighbors recently requested a quote
Generators of Maine, Inc.
5.0(
5
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving New Gloucester, 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 IQ Electric
IQ Electric
5.0(
14
)
Portable Generator - Install

Serving New Gloucester, ME and surrounding areas

Approved

In business since 2018

Free estimates

Small jobs welcome

"Prompt and courteous service. Job was completed on time and for the exact price quoted. Itâ s a pleasure to have such a trustworthy company to deal with. I highly recommend for any electrical needs you may have."
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 Power R Point, LLC
Power R Point, LLC
4.4(
19
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving New Gloucester, ME and surrounding areas

Approved

In business since 2004

Free estimates

Emergency services offered

"Jim and his team were great to work with on my generator install. I found the entire team at Power Point to be helpful and professional and the installation went as promised. I would certainly recommend them for any generator installation, maintenance or repair. They know what they are doing."
20RESD Install
Kohler 20RESD Install
Local Restaurant
20kW Kohler Installation
Response time2 days
10 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Casco Bay Generators LLC
Casco Bay Generators LLC
5.0(
5
)
Fixed Generator - InstallFixed Generator - Repair

Serving New Gloucester, 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 New Gloucester, 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%
18 neighbors recently requested a quote
Showing 1-10 of 46
Generator Install questions, answered by experts

An undersized whole-house generator has the potential to overheat and shut down when you try to run a central AC system. This scenario can not only damage the whole-house generator, but can also trip your home’s breakers or cause electrical damage. To avoid this situation, hire a local generator installer to correctly size your whole-house generator.

A home that is 2,500 square feet will likely need a 20kW to 25kW generator. Consult your local generator installer to confirm the generator size needed to power your home before purchasing a new one. Be sure to consider how much power your necessary devices need to run.

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.

Costs range from $500 to $2,500, depending on generator type and installation complexity.

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 New Gloucester, ME homeowners’ guide to generator installs

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