Turnkey Installation
Electrical, gas, and permits - all handled in-house
Mon-Fri: 8AM-4PM
Trusted since 1994, Powers Guaranteed Services has been delivering peace of mind to homes, businesses, and municipalities across New Hampshire, Vermont, and Massachusetts for over 30 years. From turnkey standby generators to complete electrical and energy solutions - the power is on, guaranteed.
I
About Us
Years of Service
Trusted Since 1994
Founded by Al Powers as a one-person operation, Powers Guaranteed has grown to over 70 dedicated professionals serving New England. We were the first generator company to provide turnkey installations in central and northern New England - handling electrical, gas, and permits all in-house.
When you choose Powers Guaranteed, you get honest advice, transparent pricing, and workmanship backed by a company with over 30 years of experience and a BBB A+ rating. Our EGSA-certified technicians and factory-trained staff deliver turnkey solutions you can count on - even in the dead of winter.
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Services
Complete electrical and generator solutions
Service Area
When it comes to new generator installations, Powers Guaranteed proudly serves homeowners and businesses across New Hampshire, Vermont, and Massachusetts. Need maintenance or repair? Our service team covers an even larger area, including Connecticut and Rhode Island. So whether you're planning a new standby generator or need expert service for the one you already have, our team is here to help keep your power ready when it matters most.
See if We Serve Your Area
IV
Why Us
The difference is in the details
Electrical, gas, and permits - all handled in-house
EGSA-certified, factory-trained generator experts
New England's first turnkey generator company


V
By the Numbers
Since 1994, we've earned our reputation through honest work, transparent pricing,
and standing behind every installation we do.
Years in Business
Team Members
Certified Technicians
Emergency Service
VI
Testimonials
Real reviews from real homeowners
"Our service technician Cameron was professional, knowledgeable and articulate in explaining the service issues."
"Great service ... Friendly staff... Great Quality work done in a timely manner. Thanks!!"
"My husband and I highly recommend doing business with Powers Guaranteed Services. We are informed in advance by text with a photo of technician who will perform inspection and a phone number to call if need be. The technicians are all very professional and knowledgeable. I like the emailed inspection report we get twice a year and the ease of paying Powers website."
"The technician was very professional and did a thorough job"
"Quick response, competent people, all work fully explained. Powers is a highly recommended company. Dan Phelan arrived promptly, worked hard to get our generator up and running, explained his work thoroughly, and was generally personable and professional—expert technician."
"ARUN HAS BEEN GREAT, VERY CARING. HEVIS THROUGH IN EXPLAINING HOW SUNRUN WORKS, THSNK YOU ARUN."
"The Kohler automatic generator install was complex at our place but they did a very good job and have had no issues with the generator for the past 4 years we have had it. The workers were all pleasant and skilled. My only complaint is the yearly maintenance cost is pricey and keeps going up. Not sure why that is. It takes about 45 minutes with spark plugs and oil change and checking everything and its over $400."
"Powers Guaranteed Services is such a wonderful company to work with, and their technician, Rob, is truly exceptional. He is consistently kind, thoughtful, and incredibly knowledgeable, and he takes the time to be thorough every single visit. His professionalism, warmth, and genuine care really stand out. I can’t recommend Rob and the entire Powers team highly enough. Thank you all so much, The Rienecker Family"
"Sean was very professional and addressed all my needs."
"So far we are happy with the services."
"Everything was great. Technician explained everything. Would only use Powers"
"Excellent service!"
"Powers came to perform the yearly maintenance on my generator in January as always . The representative was very nice and was here for over an hour doing the maintenance. It’s great to know that a rep will come out every January to perform this work. Whenever I have had to contact the company, everyone is very kind and helpful ."
"Cameron did an excellent job under very challenging conditions with the wind chill in low single digits."
"Great working with Powers from start to finish. Their tech (Cameron) was extremely professional and knowledgeable. He diagnosed and addressed the issue with our generator (in the freezing cold), explained the entire process and answered any/all of our questions. We highly recommend this Company!"
"always a straightforward, professional service visit!"
"My generator had a burning smell. Two electricians couldn’t diagnose the problem. Sean determined the exhaust pipe was cracked in a number of places and needed to be replaced. He also found the tune up by another company was not fully completed. So, I’m sticking with Powers."
"Annual service. Scheduled shead. Tech texted me ti let me know he was on the way. Service performed with no issues"
"We used Powers to install our generator and for annual maintenance for more than 10 years. We are very pleased with their service. We particularly appreciated the advice they provided to our electrician when he was working on a 100 to 200 amp upgrade of our service and made very helpful suggestions on how to deal with the generator transfer switch and PV connection that saved us time and money."
"Thank you for the regular maintenance! you have guaranteed it will run when needed!!"
"As always, you sent me a notice the day before. I had not been able to shovel the walkway to the tank and apologized to the driver. He said no problem and plowed right along. You guys are the best!"
"Well mannered technician thoroughly explained maintenance he would be performing. Completed service and conducted a power outage test. Thank you!"
"pleasant, knowledgable technician. explained what needed to be done and made sure I understood."
"I had an emergency situation with my generator and Powers supplied support quickly. I can always depend on Powers for outstanding service."
"Tech was professional!"
"The tech performed the work in a timely manner. He was friendly and considerate. The report is very detailed and includes pictures."
"Everything went well"
"Powers generator sent Nathaniel to diagnose and service my 1994 Koehler generator. Nathaniel was professional, friendly and absolutely knew his job well! It was refreshing to see a very professional person representing Powers generator service!"
"The technician performed the yearly maintenance professionally and followed up with a report of the condition of all parts of the generator and the tests performed."
"Nathaniel is very good at his work. Thank you"
"Reliable and quality service!"
"Always here when needed excellent times ten!"
"Powers have reliable, knowledgeable service people and outstanding customer service. Highly recommended!"
"Did a great job servicing our generator. Would recommend to anyone."
"Great service experience. Tech explained all he did..clean and tidy Will use them next year.."
If you refer someone who purchases a new standby generator installation or energy storage system from us, you can earn up to $750 as a thank you!