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Avatar for Champion Electrical Services Inc
Champion Electrical Services Inc
5.0(
57
)
Fixed Generator - InstallPortable Generator - InstallGenerator - Install - For Business

Serving Roslindale, MA and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

At Champion Electrical Services, we believe homeowners deserve better. No more no-shows, rushed work, or upsells you don't need. We built this company to do things right - with respect, craftsmanship, and pride. Every project is treated like it's being done in our own home: clean, code-compliant, and built to last. Whether you need a panel upgrade, EV charger, generator, or quick repair, we show up when it counts and earn your trust every time. \nLicensed, insured, and proudly serving MA & RI. \nWhen the lights go out, don't call just anyone. Call the Champ. \n \n(774) 331-3500 \nCalltheChamp.com \[email protected]

Hotel 4Homeless Dogs
Pan Mass Challenge
Attleboro Cheer Team
The Autism Corner
Generac Generator

+1

131 neighbors recently requested a quote
Avatar for Cotti-Johnson Heating-Cooling-Electrical
Cotti-Johnson Heating-Cooling-Electrical
4.7(
168
)
Fixed Generator - InstallPortable Generator - InstallGenerator - Install+2 more

Serving Roslindale, MA and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1948

Free estimates

Emergency services offered

"Jason and his team with Cotti-Johnson did an excellent job updating our electrical boxes, installing the washer/dryer hookup, and getting us setup with a generator! Sam, our assigned electrician, even took the time to go through the entire operation of the generator from A-Z. I would definitely recommend them for any electrical work!"
Navien Install
Backflow
Outdoor Shower
Well Tank Replacement
Filtration Installation

+62

Response time10 hrs
60 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Cotti Johnson HVAC, Inc.
Cotti Johnson HVAC, Inc.
4.3(
63
)
Fixed Generator - InstallFixed Generator - Repair

Serving Roslindale, MA and surrounding areas

Approved

In business since 1944

Free estimates

Emergency services offered

"Tim P, Generator Advisor, visited our house and gave on the spot estimatesâ ¦..he was GREAT. Licensed Electrician who knew his business and was easy to speak with. Timely communications and responses to text messages! Tim was helpful answering questions after the generator was installed. We talked to 5 Generac dealers and a Kohler dealer. Cotti-Johnson had the best pricing in the South Shore area. We highly recommend this company. If you are thinking about buying a standby generator, Cotti Johnson is the company to callâ ¦..Art V"
Home Standby Generator Installation
Home Standby Generator Installation
Home Standby Generator Installation
Home Standby Generator Installation
Home Standby Generator Installation

+56

Response time9 hrs
Response rate97%
80 neighbors recently requested a quote
Avatar for Services & More LLC
Services & More LLC
4.8(
31
)
Portable Generator - Repair

Serving Roslindale, MA and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"Adam and his team are so kind, professional and do a fantastic job every trip. I am on the biweekly rotation and with how great my grass is doing if I ever move im going to check if they service my area before I go. The first time they came my grass was super overgrown and they explained to me clearly what their gameplay was then and asked me what I wanted with the space. I will recommend them to anyone who asks."
Furniture Assembly
Bathroom Remodel
Bathroom Remodel
Bathroom Remodel
Bathroom Remodel

+4

37 neighbors recently requested a quote
Avatar for Castle Electric, Inc.
Castle Electric, Inc.
3.9(
28
)
Fixed Generator - InstallPortable Generator - Install

Serving Roslindale, MA and surrounding areas

Approved

In business since 1997

Free estimates

Emergency services offered

"Lisa and apprentice arrived early and got right to work. The job was not as straight forward as I had believed. After much study, Lisa developed a plan and executed it to perfection. There was excellent team work and no wasted effort or time. The result was great and even though they used contractor supplied parts, they honored their original price. At the end, they thoroughly tested their installation and did a great job in cleaning the area. A light fixture had been dropped and they volunteered to replace it if there was any problem with it (there wasn't). Overall, I was very satisfied with all aspects of this job."
Pendants
Kitchen
Kitchen
Kitchen
Kitchen

+72

11 neighbors recently requested a quote
Recommended by70%of homeowners
Avatar for NEC Electric
NEC Electric
3.9(
109
)
Fixed Generator - InstallPortable Generator - Install

Serving Roslindale, MA and surrounding areas

Approved

In business since 1978

Free estimates

Warranties offered

"Our electrician Ed was amazing. Knowledgeable, friendly, and didnt upsell us on anything we didnt need. We have gone back to them for other electrical projects. 10/10."
EV Charger Install
Panel Replacement
Speciality Lighting Installation
Exterior Condenser
Interior mini split

+1

Response time30 mins
73 neighbors recently requested a quote
Recommended by77%of homeowners
Avatar for J M Electrical Company, Inc.
J M Electrical Company, Inc.
5.0(
4
)
Generator - Install - For BusinessGenerator - Repair - For Business

Serving Roslindale, MA and surrounding areas

Approved

In business since 1985

Free estimates

Emergency services offered

"First and foremost, Joel was a pleasure to work with! Joel was extremely knowledgeable and helpful with the installation of our new Google nest. We were impressed with how prompt & easy going he was! Definitely going to be using him & recommending to family & friends."
Response time9 hrs
Response rate97%
8 neighbors recently requested a quote
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Generator Install questions, answered by experts

No, you should never plug a generator directly into a wall outlet in your house. This practice is extremely dangerous, often illegal, and can cause "back-feeding," where power from the generator flows back into utility lines, creating a life-threatening hazard for utility workers. It can also damage your home's electrical system, including appliances like pumps and HVAC fans. If the main power is restored while the generator is connected, it can destroy the generator and cause an electrical fire. To safely connect a generator, you must use a professionally installed transfer switch or an interlocking kit, which prevents back-feeding by disconnecting your home from the utility grid before the generator provides power.

A 10,000-watt generator can run a small to mid-sized central AC unit (typically up to 3 tons or 36,000 BTU) along with a few other appliances. However, larger AC units or additional loads will require a bigger generator. Consult a local generator installer to ensure you add the correct size generator to your home.

If you’re wondering whether gas generators produce carbon monoxide, know that natural gas generators do not produce carbon monoxide if they are functioning properly, as natural gas burns cleanly. However, if the generator malfunctions and the gas does not burn completely, there is potential for carbon dioxide to be produced. To prevent malfunctions, it's crucial to perform regular maintenance, including running the generator weekly and scheduling professional inspections every 6 to 12 months. Also, be sure to test your carbon monoxide detectors regularly to ensure they function in the rare case of the generator producing carbon monoxide.

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.

The Roslindale, MA homeowners’ guide to generator installs

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