Generator Installation & Service

Whole-house and standby generators. Automatic transfer switches. Installation, maintenance, repair. SE MA and RI.

Power When the Grid Goes Down

SE Massachusetts and Rhode Island lose power. Hurricanes, nor’easters, ice storms, summer thunderstorms. A standby generator kicks on automatically and keeps your heat, refrigerator, sump pump, and lights running until power returns.

We install whole-house generators from Generac, Kohler, and Briggs & Stratton. The unit sits outside on a concrete pad and connects through an automatic transfer switch. When power drops, it starts in seconds without you touching anything.

Gas line, transfer switch, electrical hookup, and concrete pad all included. Our team handles gas, electrical, and HVAC, so no outside contractors needed. We also do annual maintenance and repair on existing units.

Automatic Startup

Generator runs in seconds, no manual action

Gas or Propane

Natural gas or LP, we install both

All Trades In-House

Gas line + electrical + pad in one project

Annual Maintenance

Keep your generator ready year-round

⭐⭐⭐⭐⭐ Donna is always so polite and accommodating. The technicians are knowledgeable and professional. We've used Triangle for years and wouldn't call anyone else.

Karen L.

Residential Customer

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Services Form — Triangle Mechanical (#5)

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Our Installation Process & Brands

Free Assessment

We evaluate the space, measure rooms, and check your electrical panel. No cost, no obligation.

Custom System Design

We spec the right system for your home and put the price in writing before any work starts.

Professional Installation

Our licensed techs handle HVAC, electrical, and any panel upgrades. All in-house. No subcontractors.

System Training & Warranty

We walk you through the controls, register your warranty, and stand behind the work with a one-year labor guarantee.

What Does a Generator Cost in SE MA / RI?

A whole-house standby generator runs $10,000 to $20,000 installed. That includes the concrete pad, gas line, transfer switch, and electrical hookup. kW rating and fuel type set the price.

Annual maintenance runs $350 to $500. Oil, filter, battery, and a load test.

Transfer switch replacement on an existing unit runs $2,500 to $3,500. Repairs are quoted per issue, and we stock common parts.

Generator Quick Reference (2026)

Whole-house generator (installed)$10,000-$20,000

Annual maintenance$350-$500

Transfer switch replacement$2,500-$3,500

Generator repairQuoted per issue

Sized to your load. 22kW covers most 2,000-3,000 sq ft homes.

Why Homeowners Choose Triangle for Generators

In-House Electricians

Most HVAC installers sub out the panel work. That means two companies, two schedules, two invoices. Our own electricians handle the panel work. One company, one invoice.

Mass Save Participating Contractor

We know which systems qualify, what documentation the program requires, and where homeowners usually lose money by picking the wrong equipment tier. We confirm your eligibility before you spend a dollar.

55 Years. Not a Startup.

Rebate money brought a lot of new companies into this market. Triangle has been at 425 Pleasant Street in Fall River since 1970. When your compressor needs warranty service in 2030, we will still be here.

Four Trades, One Company

Getting a mini split and notice the water heater looks rough? Want a generator quote while we are there? Heating, cooling, plumbing, electrical, refrigeration. One call, one truck, one bill.

What Our Customers Say

⭐⭐⭐⭐⭐They diagnosed a heating problem we had for over 20 years that no one else could figure out — including one of the guys from This Old House. They didn't give up until they solved it. The owner Tom is wonderful and Neil is a real gem!

⭐⭐⭐⭐⭐Donna is always so polite and accommodating. The technicians are knowledgeable and professional. We've used Triangle for years and wouldn't call anyone else.

⭐⭐⭐⭐⭐ AJ, Chad, and Tony did an amazing job on our church's HVAC system. Professional, clean, and on time. Triangle treats every job like it matters.

⭐⭐⭐⭐⭐ Called on a Sunday night with no heat. They had someone at our house within an hour. Fixed it on the spot. Can't ask for more than that.

⭐⭐⭐⭐⭐ We use Triangle for all our rental properties. One call for heating, plumbing, electrical — they handle everything. Makes my life so much easier.

How much does a whole-house generator cost?

$10,000 to $20,000 installed. 22kW covers most homes. We size to your load and provide a written quote. Call (508) 501-7424.

Natural gas or propane?

If you have gas service, that is usually better since you never run out of fuel. No gas? Propane works well and we install the tank.

How long does installation take?

Most residential installs are one to two days. Permits and utility coordination take longer than the physical work.

Do you service generators you did not install?

Yes. All major brands. Annual maintenance includes oil, filter, battery, and load test.

What size generator do I need?

Depends on what you want to keep running. A 22kW unit covers most 2,000 to 3,000 square foot homes for whole-house backup. Smaller units cover essentials like heat, the refrigerator, and the sump pump.

How often does a standby generator need service?

Once a year at minimum. Annual maintenance runs $350 to $500 and covers oil, filter, battery, and a load test. Skipping it is how generators fail during the first nor’easter of the season. We service Tiverton, Westport, and everywhere in between. Call (508) 501-7424 to get on the schedule.

Ready to Get Started?

Whether you need an emergency repair, a new installation, or a second opinion, Triangle is here to help. One call handles it all.