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  • Average homeowner rating star icon4.7
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  • Verified reviews icon17
    Verified generator installs reviews

Find Generator install pros in Harmony

Avatar for Champion Electrical Services Inc
Champion Electrical Services Inc
5.0(
54
)
Fixed Generator - InstallFixed Generator - RepairPortable Generator - Repair+2 more

Serving Harmony, 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]

My jobs
My jobs
My jobs
My jobs
My jobs

+17

252 neighbors recently requested a quote
Avatar for Botelho & Sons Electric
Botelho & Sons Electric
5.0(
50
)
Portable Generator - Install

Serving Harmony, RI and surrounding areas

Approved

Super Service Award Winner

In business since 2007

Free estimates

Emergency services offered

"Ryan did a great job. Showed up when he said he would, took great care in cleaning up after installing the bathroom ceiling exhaust fan I had purchased. If I need any additional electrical work, I will be calling Ryan."
Response time5 hrs
35 neighbors recently requested a quote
Recommended by4%of homeowners
Avatar for Electricians R Us
Electricians R Us
4.8(
15
)
Fixed Generator - InstallFixed Generator - RepairGenerator - Install+4 more

Serving Harmony, RI and surrounding areas

Approved

Super Service Award Winner

In business since 1987

Free estimates

Warranties offered

"David did an amazing job. He called me very quickly after I signed up on Angi. He set up a time to do the job within 4 days. He got both jobs done in a very short amount of time. His price was really reasonable. I would not hesitate to hire David again!"
Electrical services
Electrical services
Electrical services
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+6

28 neighbors recently requested a quote
Recommended by100%of homeowners
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Generator Install questions, answered by experts

You can expect a diesel generator to last for up to 30,000 hours of use, which works out to 20 to 25 years with the proper maintenance, of course. That depends on how much you use it, so a diesel generator used for emergencies a couple of times a year will last a lot longer than a generator that takes over for a faulty electrical grid every month for a day or two. 

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.

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.

Natural gas and electricity rates vary significantly based on location, and pricing can change over time, too. It’s possible that in locations where natural gas is particularly inexpensive, it will cost less than grid-based electricity will. However, you should also factor in the generator’s initial costs and maintenance needs, as well as its noise level and if it can comfortably power all your home appliances.

DIY is possible for basic setups. Professional installation ensures safe and proper electrical connections.

The Harmony, RI homeowners’ guide to generator installs

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