• Commercial & Residential Generator Service
  • All Generator Equipment Serviced
  • Expert Generator Installation
  • Industrial Support
  • Generator Load Bank Testing
  • Fast Reliable Delivery
  • Advanced Generator Installation Teams
  • Highly Schooled Technicians
  • Commercial & Residential Service
  • All Equipment Serviced
  • Expert Installations
  • Industrial Service & Support
  • Load Bank Testing
  • Fast Reliable Delivery
  • Advanced Installation Teams
  • Highly Trained Factory Technicians
  • Expert sales & service
  • Rapid customer response
  • All major brands
  • Over 50 Years Experience

Your Number One Source for Long Island Standby Power

Mayfair Power Systems, Inc. was founded in February of 1961 by partners Paul Eberst and C. Gourley Gahn. The business was incorporated as Mayfair Marine Service and located on Woodcleft canal in Freeport NY.

Mayfair Power Systems is now currently servicing over twenty-five hundred generator sets. We celebrated our 50th Anniversary in February of 2011  |  More about Mayfair


  • "I'm sure, like most businesses that you get complaints & unhappy customers. So I thought I would send you a note to tell you how satisfied I am with the service you did for me! I dealt with MAYFAIR for ages, starting in the 1970's when I was captaining boats. I didn't realize that you did home equipment until I finally called you. . ."
    - Herb G. | Read Full Testimonial

  • "We want to thank you for servicing our generator on an emergency basis during the recent storm-related power outage. Because we have a seriously handicapped family member it was especially important to us to have our generator restored to good working order as soon as possible, and we appreciate your efforts in this regard. Thank you again."
    - Dorothy V. | Read Full Testimonials

  • "I'm writing to let you know what a great employee you have in Ryan. He came for my first maintenance on my Generac generator that was installed after Sandy last July. I knew there were many things I needed to know after reading the instruction manual and had many questions regarding the operation of my generator. I was afraid of it. Today, for the first time, I feel capable . . ."
    - Helen G. | Read Full Testimonials

  • "I just wanted to take the time to thank your tech for doing such a great job. He was very knowledgeable and worked directly with our electrician ensuring that everything went well. Once we found out that the generator would have to stay on he had no problem going the extra mile to remain onsite until he was relieved. Where your techs always do a good job . . ."
    - Stan J. | Read Full Testimonials

  • "We just wanted to write to tell you how incredible it was to have such a reliable generator during Hurricane Sandy! Power was not restored to our neighborhood for about 10 days, but we had heat, hot water, and electricity throughout thanks to your/our generator. We were one of the only houses in our community to have power throughout the storm. . . ."
    - The Liebers | Read Full Testimonials

  • "I just wanted to tell you how satisfied I was with the installation. Darren, Anthony and the 3rd guy (I didn't get his name) were very professional and easy to deal with. Anthony even remembered installing my original generator a year ago!"
    - Shelly H. | Read All Testimonials

  • "Thank you very much for the courtesy, professionalism and compassion you extended to Natalia and me on our recent visit to Mayfair Power Systems. You helped me to fix my boat generator with a couple of simple replacement parts when one of your competitors sent a tech and charged me a lot of money and was still unable to fix it."
    - Stephen R. | Read All Testimonials

  • "I just wanted to say thank you for getting Chris here bright and early this morning. He was able to fix the problem and we were able to get cases started by 9:00 am, which is what we had told our patients last night when we found out there was a problem."
    - Laurie S. | Read All Testimonials

  • "Chris was efficient, courteous, professional, and explained every step of what he was doing to get the generator up and running. He diagnosed a dead battery and replaced it, while straightening out a couple of other issues that needed attention, as well as reprogramming the generator to complete the exercise program every week. . ."
    - Bill K. | Read Full Testimonial

  • "The technician performed a competent and thorough tune up on my generator. He conducted himself in a professional manner. He is an asset to your company. I own an equipment service company, therefore I speak from experience."
    - Louis P. | Read All Testimonials

  • "Mayfair, Ryan is terrific, efficient, knowledgeable, pleasant . . . Thank you,"
    - Stuart P. | Read All Testimonials

  • "We can't thank you enough for the help during the hurricane. It was truly appreciated!"
    - Dan D. | Read All Testimonials

  • "Thank you very much! We were very happy with the honest techs who explained everything. Mayfair really hires good people. Much appreciation and take care!"
    - Carolyn | Read All Testimonials

  • "Just a quick note to tell you how pleased I am with your technician Chris. He was very polite, knowledgeable and clean. He gave me a good tutorial on my generator upon hook up. He noticed the controller needed to be changed and he was here the next day and changed it. Give hime a raise!! Hehe."
    - John R. | Read All Testimonials