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Generators of Maine, Inc.
5.0(
5
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+1 more

Serving Thomaston, 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 Mid Maine Generator
Mid Maine Generator
5.0(
18
)
Fixed Generator - InstallGenerator - Install - For Business

Serving Thomaston, ME and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"First class operation, 4 guys showed up early and worked nonstop for 5 hours to complete the install. they took extra care to smooth out the trenches they dug for the propane and wiring. Very professional and an incredibly high quality install."
Another Great Install
Another Great Install
Another Great Install
Another Great Install
Another Great Install

+12

Response time1 day
Recommended by100%of homeowners
Cushnoc Electric
5.0(
5
)
Portable Generator - Install

Serving Thomaston, ME and surrounding areas

In business since 2024

Free estimates

Credit card accepted

"I reffered to Alex about helping me with some wiring issues in my 1840 home in Augusta. Alex came right over and quickly assessed the issue, and fixed things super quick. excellent work and super friendly. it's super impoto have a reliable electrician on hand saving Alex and Cushnoc Electric for the future!! Thank you!"
Response time2 days
Response rate87%
Recommended by100%of homeowners
Avatar for 2 Rivers Electric
2 Rivers Electric
4.8(
5
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install - For Business+3 more

Serving Thomaston, ME and surrounding areas

In business since 2025

Free estimates

Emergency services offered

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.

Logo
Response time4 hrs
Response rate100%
Corson Electric
5.0(
1
)
Fixed Generator - InstallGenerator - Install - For BusinessPortable Generator - Repair

Serving Thomaston, ME and surrounding areas

In business since 2000

Free estimates

Offers commercial services

Corson Electric, 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.

Kitchen lighting
Response time3 hrs
Recommended by100%of homeowners
Avatar for K & J Electric LLC
K & J Electric LLC
New to Angi
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Thomaston, ME and surrounding areas

In business since 2017

Free estimates

Small jobs welcome

K & J Electric is owned and operated by Kevin Walker, Master Electrician. We proudly handle both residential and commercial electrical work, and no job is too big or too small. Whether it’s new construction, renovations, or upgrades to an older property, we complete every project neatly, safely, and on schedule.\n\nEstimates are always free — call Kevin today to discuss your project.

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Generator Install questions, answered by experts

The average cost to install a home generator is $5,200, but total costs can range from $500 to $18,000 or more. The final price depends on several factors, including the generator's size, type, brand, fuel source, and the cost of labor and assembly. The generator's size is the most significant cost factor, as units that can power larger homes with higher energy demands cost more.

Cost breakdowns by generator type are typically as follows:

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

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

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

To ensure you get the right size unit for your needs without overpaying, consider hiring an electrician to calculate the electrical load of your essential appliances. It is also recommended to get at least three quotes from qualified installers to find the best fit for your budget.

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

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.

To power a central air system during a power outage, the whole-house generator will need to be at least 5,000 watts, and this number will significantly increase for larger units. Check the specific wattage requirements of your AC unit to choose the right generator size. Consider consulting a generator installer to ensure your whole-house generator meets your electrical load needs.

If you’re deciding between a solar battery versus a generator for the best backup power solution, you can take a few factors into consideration. Solar batteries are quiet while generators can be quite loud. Generators have a lower up-front cost, but they require fuel and ongoing maintenance while solar batteries are more expensive but don’t have many ongoing costs.

The Thomaston, ME homeowners’ guide to generator installs

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