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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 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

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Generator Install questions, answered by experts

As a safety measure, you should always turn off the main breaker while operating your generator’s backup breaker. In addition, you should also switch off all appliance breakers so you don't have a power surge when the main breaker turns back on. And finally, turning off the main breaker prevents back-feeding, which endangers utility workers with the risk of electrocution. Back-feeding could also destroy the electrical circuits of your neighbors if they use the same power network.

While diesel is relatively stable, it won’t last nearly as long as propane and you may have to replace it if it sits unused for too long. Diesel can sometimes struggle to work efficiently or start engines during especially cold weather, so it’s not the best choice for every climate. Compared to fuels like propane and natural gas, diesel generators tend to be noisier and create more exhaust, which isn’t always ideal for home use.

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.

With proper maintenance, a whole-house generator can last between 20 and 40 years. The specific lifespan depends on how often and for how long the generator is used, and some models may have their life expectancy rated in hours of operation. To maximize its lifespan, expect to spend around $150 to $300 per year for annual maintenance checks from a qualified technician. During these checks, a technician will inspect the engine filter, starting mechanism, fuel, lubrication, and coolant levels. Consulting your installer and choosing a low-impact fuel like natural gas or diesel can also help ensure your generator lasts as long as possible.

It’s usually better to repair your generator if it isn’t working properly, as it will typically be much more affordable and should yield similar results. Generator repairs cost around $300 on average, while installing a new whole-house generator costs around $5,000 on average. The only exception is if you know your generator is reaching the end of its useful life, usually between 30 and 40 years. If you have an older generator, you could face multiple repairs in the coming years, which might mean that a full replacement will be more cost-effective over time.

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.