Generator Services in Denver
Power You Can Count On—Even When the Grid Goes Down
When unpredictable Colorado weather knocks out your electricity, a dependable generator gives you peace of mind. At Allen Service, we install and service home and commercial generators across Denver and the surrounding areas, so you're never left in the dark. With over 60 years of experience and same-day service, we’re the trusted choice for powering through outages, whether from blizzards, wildfires, or grid overloads.
We proudly offer same-day emergency support when needed, financing options, and a bilingual team - se habla español - to better serve every customer.
Call (970) 431-6574 today or contact through our online form to schedule your generator service or installation.
Custom Solutions for Homes & Businesses of All Sizes
At Allen Service, we help homeowners and businesses across Denver, Aurora, Centennial, Boulder, Greeley and Eaton choose the right generator for their needs. Our highly trained technicians evaluate your property, electrical setup, and power requirements to recommend the best solution.
We install, replace, and service generators for:
- Single-family homes
- Townhomes and condos
- Office buildings
- Medical clinics and retail spaces
- Restaurants and hospitality properties
Whether you need whole-home coverage or just enough for the essentials, we’ll guide you through generator sizing, fuel options (natural gas, propane, or diesel), and load requirements. We also take care of all permitting and code compliance from start to finish.
Our Proven Installation Process
We’ve refined our generator installation process over decades to provide efficient, seamless service, no guesswork, no delays.
Here's what to expect:
- Site assessment. We evaluate your energy usage, panel capacity and location needs.
- Generator selection. We'll help you choose a model that fits your home or business needs.
- Site preparation. From pouring the pad to gas and electrical line prep, we handle it all.
- Professional installation. Our technicians wire your system to your panel and install the transfer switch.
- Testing and training. We test your generator and show you how it works—so you're fully prepared.
- Ongoing support. Need a tune-up, inspection, or emergency repair? We’re here to help when it matters most.
Every installation meets national code and manufacturer guidelines. Our fully stocked trucks mean fewer delays and faster job completion, with parts on hand for most generator models.
Hear From Our Happy Customers
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“Allen Service came out promptly and saved the day for me! My 50-year-old condo needed service immediately & they delivered! I recommend this company wholeheartedly. Ask for Brian and Michael!”Drew V.
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“The company was responsive and went above and beyond. They worked through my broken sink issue and were informative along the way. Extremely polite and efficient. I would absolutely ask Allen for service again!”Dorothy G.
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“Allen has been our preferred vendor for maintenance and repairs across our entire apartment community. Their team is consistently prompt, professional, & efficient. They respond quickly, diagnose the problem accurately, & complete repairs quickly.”Alison W.
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“Zach Workman did an excellent job fixing my AC capacitor. And even gave me a very well explained run down of how AC units work, especially capacitors. This was beneficial to me as I am a tradesman myself. Highly recommend Allen Service.”Chance I.
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“I had a great experience with Allen Service when our AC stopped working. Kevin, was extremely polite and knowledgeable. He was able to diagnose and resolve the issue quickly and even provided some informative advice for us moving forward.”Jenna A.
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“Awesome service and customer care. They were stupendous! I noticed immediately how positive and energetic they were, working together as a team to rectify our issues. These young men were personable, courteous, & very informative.”Nicholas S.
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“My technician today was professional, courteous, thorough, and made everything easy to understand. My AC had stopped working and Allen was able to get someone to my house within 4 hours which was exceptional and appreciated!”Shannon M.
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“A wonderful experience with both of the technicians today. They arrived early, were pleasant, very professional, and installed an amazing unit.”Mary F.
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“Exceptional customer service from the first phone call, to scheduling, to completion of service appointment, to diagnosing the A/C not cooling properly. Extremely impressed. I will gladly be telling everyone I know to call for any of your services!”Christie S.
is Just a Click Away Colorado’s Trusted Home Service Team
Tell us what you need, and we’ll take care of the rest.
Generator Maintenance & Repairs
Like any major appliance, standby generators require routine maintenance to stay dependable. We provide annual inspections, oil changes, battery testing, and full system diagnostics. If your generator won’t start or shows an error code, our team is ready with same-day emergency repairs when needed.
Common generator service calls include:
- Faulty transfer switches
- Battery failures
- Fuel supply issues
- Sensor or control panel problems
- No-start or shutdown mid-operation
If you already have a generator installed and need dependable service, Allen Service is the name clients trusts for responsive, professional repairs.
- Allenspark
- Ault
- Aurora
- Bellvue
- Berthoud
- Boulder
- Broomfield
- Castle Rock
- Centennial
- Commerce City
- Denver
- Eaton
- Firestone
- Fort Collins
- Fort Lupton
- Gilcrest
- Greeley
- Hudson
- Jamestown
- Johnstown
- Kersey
- La Salle
- Lafayette
- LaPorte
- Longmont
- Loveland
- Lyons
- Milliken
- Niwot
- Plattville
- Severance
- Timnath
- Wellington
- Windsor
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The Help You Need
is Just a Click Away Colorado’s Trusted Home Service TeamTell us what you need, and we’ll take care of the rest. -
Allen Services
Membership Rewards Your Home’s VIP PassEnjoy routine check-ups, priority scheduling, and member-only perks that keep your home running smoothly. -
Easy Financing for
Any Budget Affordable Payments. Exceptional Service.Our financing plans make it simple to invest in your home when it matters most.
Benefits of Installing a Generator
A generator does more than just keep the lights on, it protects your household or business operations when every second counts. Whether you run a medical device, manage a data-driven business, or simply want to prevent spoiled food and frozen pipes, a standby generator acts as a safeguard against downtime and damage.
Other advantages of installing a generator include:
- Automatic backup power. Your standby generator activates instantly during an outage, no need to flip a switch.
- Protection for essential appliances. Keep refrigerators, medical devices, HVAC systems and sump pumps running.
- Peace of mind during emergencies. Stay connected, safe and comfortable no matter the storm.
- Minimized business disruption. Commercial generators help avoid costly downtime or equipment failure.
- Increased property value. Generators are a smart long-term investment, especially in areas prone to blackouts.
