Electric Power Service & Repair


For your home or your business, reliable power is essential, particularly when the power goes out. If you’ve invested in a backup generator, you want the best service possible in the event of an emergency. With dozens of technicians on call throughout The Tri-state Area, no one can respond quicker to an emergency need than H.O. Penn Machinery. We specialize in fast and cost effective emergency generator service in New York Metropolitan and Connecticut. Our expert technicians can come to your location and provide mobile repairs and diagnostics that will get you back up and running quickly. We service all makes and models of generator set, flywheel and other power generation products.

We are able to provide 24 hour emergency generator repairs throughout Connecticut and New York Metropolitan. Click here to find your local generator repair service department.

  • 24/7, 365 availability.
  • All makes and models.
  • For emergency generator service and rental support, please call us at 888-RENT-CAT.

Find Your Service Rep


A small investment in preventative maintenance can help keep your power generation system running its best year round. Preventative generator maintenance can detect problems before they cause equipment failure, allowing you to schedule repairs accordingly to minimize downtime.

Not every generator set will have the same preventative maintenance needs. Some require little more than an annual checkup, whereas others should receive regular fluid and coolant testing. No matter what type of stand-by system you have, we can design a maintenance plan around your requirements.

  • Complete Maintenance and Repair.
  • Factory trained technicians
  • Fluids Analysis Laboratory
  • Diesel fuel sampling
  • Coolant analysis
  • All makes and models.
  • Automatic transfer switch inspection and cleaning.
  • Complete System Load bank testing.

Click here for our Electric Power Preventive Maintenance


Today, the generator is just one part of a total power solution. For emergency generator service in New York, trust the team that knows all aspects of power generation, from system design and installation to complete equipment rebuilds. With roots dating back to 1923, the H.O. Penn company has the expertise to deliver comprehensive support and solutions to all our clients. Our sales engineers understand the importance of making sure all the proper systems are in place and configured to match your application. We’re here to support you from initial design through start-up.

  • Contingency planning for emergency power needs.
  • Operator training and start-up assistance.
  • Extended Warranty Programs
  • More


An un-maintained Diesel Fuel System whose fuel sits for an extended time can accumulate water and sludge generating microbiological growth; it can experience microbial influenced tank corrosion and fuel filter plugging: Plugging that can lead to engine fuel starvation, injector damage, poor engine performance and ultimately engine shutdown.

H.O.Penn provides a full range of Fuel System Maintenance Solutions, from diesel fuel sampling, through treatment with H.O.Penn’s Shock & Bulk ™, to fuel polishing. We can custom design Fuel System Planned Maintenance programs which will keep your fuel as well maintained as your engine.

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