Top-rated generator install pros.

Get matched with top generator install pros in Johnston, RI

Enter your zip and get matched with up to 5 pros

Need a pro for your generator install project in Johnston, RI?

Select your specific project to find the pro for you.

TRUSTED BY JOHNSTON, RI HOMEOWNERS

  • Average homeowner rating star icon4.2
    Average homeowner rating
  • Verified reviews icon10
    Verified generator installs reviews

Find Generator install pros in Johnston

Avatar for Rhode Island Generator
Rhode Island Generator
4.7(
56
)

Serving Johnston, RI and surrounding areas

Approved

In business since 2006

Free estimates

Warranties offered

"Fantastic experence. John is the consumate professional and truly a very nice and knowledgable man. A pleasure to have him work for us. Always keeping us informed as to the particulars of our standby generator install and always on time when promised, he surpassed every other service and equipment supplier we have ever had working for us. Do not even consider doing a project like this without John."
Generator Installs
20 KW Generac Generator
Generator Installs
20KW Generac Generator
Generator Installs

+14

Response time1 day
19 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Cotti-Johnson HVAC, Plumbing and Electrical RI
Cotti-Johnson HVAC, Plumbing and Electrical RI
4.8(
27
)

Serving Johnston, RI and surrounding areas

Approved (Corporate)

In business since 1948

Free estimates

Emergency services offered

"Very well. These guys, Gil, Luis, Jake and Nick, did a great job with our 2 day installation, they were professional, friendly, answered questions easily, protected the indoor environment (drop cloth, ppe etc), and reassembled and thoroughly cleaned everything afterward. Look forward to contracting with them again for any other large job."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+40

Response time7 hrs
20 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Champion Electrical Services Inc
Champion Electrical Services Inc
5.0(
53
)

Serving Johnston, RI 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]

64 neighbors recently requested a quote
Avatar for Botelho & Sons Electric
Botelho & Sons Electric
5.0(
47
)

Serving Johnston, RI and surrounding areas

Approved

Super Service Award Winner

In business since 2007

Free estimates

Emergency services offered

"I can’t recommend Botelho and Sons Electric highly enough. From start to finish, the experience was outstanding. They were punctual, neat, and completely reliable, showing up exactly when they said they would and keeping the work area clean and organized throughout the entire project. I had a 200-amp panel upgrade, lines run to a pool & hot tub, copper wire installed for the pool and the connection for our generator - everything was done to code, with obvious skill and attention to detail. Out of 6 electricians I got quotes from, Ryan offered the best price without cutting any corners. On top of that, both he and his employee were incredibly knowledgeable and professional. Bonus points for being amazing with my 130 lb Cane Corso, who is usually suspicious of strangers. It was clear they were comfortable around dogs and respectful of my space, which made the whole process that much smoother. If you want high-quality work from someone you can trust, I wouldn’t look any further!"
Response time9 hrs
27 neighbors recently requested a quote
Recommended by4%of homeowners
Avatar for Electricians R Us
Electricians R Us
4.8(
15
)

Serving Johnston, RI and surrounding areas

Approved

Super Service Award Winner

In business since 1987

Free estimates

Warranties offered

"Called David for an Emergency Service on a Saturday night, he came out immediately restored temporary power for the night as came back Sunday morning and updated my Service! He went above and beyond for me, was professional and fair and took pride in his work! I highly Recommend Electricians R us and David to anyone looking for an Electrician! 5 ⭐️’s. T.y David!!"
Electrical services
Electrical services
Electrical services
Additional Photos
Additional Photos

+6

25 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Cox Electric, LLC
Cox Electric, LLC
4.7(
10
)

Serving Johnston, RI and surrounding areas

Approved

In business since 2002

Free estimates

Emergency services offered

"Everyone we dealt with was friendly, responsive and knowledgeable. From our initial call to explore a generator through purchasing and installation, everyone at COX demonstrated exceptional and timely customer service. Their experienced team of technicians were there on time when they said theyâ d be there. They provided timely notifications and clearly communicated throughout every step of the installation process. We were impressed with their work ethic and the results."
Generac Installation
Wood surround
Block surround
Response time2 days
44 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for ABN Electric LLC
ABN Electric LLC
5.0(
9
)

Serving Johnston, RI and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"I highly recommend Ben @ ABN for your electrician needs. I hired ABN to replace outdated two-prong outlets with three-prong GFCIs, and install a completely new outlet in my bathroom, and they did an incredible job in no time. Their professionalism, skill, prices, and good attitude were excellent. I will be hiring ABN for all of my future projects too. Thanks!"
Response time50 mins
Response rate97%
Recommended by100%of homeowners
Avatar for Ampistry Electric
Ampistry Electric
5.0(
5
)

Serving Johnston, RI and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

At Ampistry Electric, we bring trusted, top-quality electrical service to all of Rhode Island. I’m Nathan, and I focus on delivering reliable, safe solutions, whether it’s a fan installation or an upgrade to your home’s wiring. With Ampistry, you’ll get clear communication, honest pricing, and a job done right the first time.

Kitchen lighting
Kitchen lighting
Kitchen lighting
UnderCabinet Lighting
UnderCabinet Lighting

+17

...
Showing 1-10 of 76
Generator Install questions, answered by experts

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.

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.

Natural gas generators are designed to run for extended periods of time, such as power outages during a natural disaster. Since there’s no limit to the supply of natural gas, they don’t need to stop for refills. However, generators do need maintenance, including pauses to check and add oil. Constantly running them will also cause a lot more wear and tear, leading to a shorter lifespan.

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.

The Johnston, RI homeowners’ guide to generator installs

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