Auxiliary Power Systems, Inc. 


Residential - Commercial - Industrial Application
6 kW to 40 kW

Automatic emergency power systems have been available for years. GENERAC Power Systems has taken large generator set experience and applied it to the residential and small-to-medium sized business markets. They did this by designing a family of the most powerful, fully automatic, enclosed generators of their size available.

The GENERAC Guardian™ emergency power system is a prepackaged, state-of-the-art electricity generation system designed for homes and small businesses. Available in a size range from 6 to 40 kW, these units come with several fuel options (natural gas, liquid propane (LP), or diesel) and full control panel instrumentation for easy on-site usage.

Within seconds of a power outage, Guardian powers up automatically and begins supplying electrical power in order to maintain operation of your sump pump, heating or air conditioning, computers, appliances, and security systems.

The Guardian emergency power system is the most powerful, fully automatic, enclosed generator of its size available anywhere. They are quiet, reliable, and loaded with these special features:

Automatic Engine Start/Stop
Automatic Exerciser
Battery Charger
Hour Meter
Automatic Electric Load Transfer
Automatic Safety Shutdown
Main Circuit Breaker

The heart of the system . . .

This transfer switch is the difference between a truly automatic generator set and just another generator.


Commercial 8 kW to 400 kW

Commercial - Emergency Standby Generators

Leasing or Rental Units Available

  • Factory Warranted Custom Packaging
  • Automatic Shutdown Protection Systems
  • Solid-State Sensing and Starting Controls
  • Microprocessor-Based Control Panel (optional)
  • GENERAC Manufactured Alternator
  • RS-232 Communication (optional)
  • Permanent Magnet Excitation (125 kW and Below-optional)
GENERAC Power Systems offers the GR series of mobile diesel generator sets, which are easy to transport, easy to maintain, and best yet, easy on your budget. Designed with a premium on versatility and value, the GR series is packed with standard features that set GENERAC apart from the competition.

  • Rugged Custom Trailer
  • Electronic Governor
  • CSA Compliance
  • Automatic Start (2 Wire)
  • Warning and Automatic Safety Shutdown
  • Integrated Fuel Tank (Trailer Mounted)
  • Battery Charger
  • Jacket Water Heater
  • Sound Deadening Enclosures
  •  Automatic Voltage Regulation
  • Simultaneous High and Low Voltage - Three-Phase (Single-Phase Available)
Industrial Application
400 kW to 2000 kW

GENERAC utilizes the most up-to-date, modern engine technologies in our 400 to 2000 kW product lineup. We continue to enhance our engine efficiencies through turbo-charging and after-cooling of the engines. This has provided our engines with the industry reputation of being "stingy" on fuel, which equates to lower lifecycle operational costs.

These units are manufactured, tested, and shipped from our ISO9001-certified facility located in Eagle, Wisconsin. Additional plant capacity has positioned us to better satisfy future market demands.

Standard Features:

  • Modern Engine Technology
  • Permanent Magnet Excitation
  • Digital Voltage Regulation
  • Microprocessor-Based Control Panel (optional)
  • Electronic Isochronous Governor
  • RS - 232 Communication (optional)
  • Factory Warranted Custom Packaging 
GENERAC power systems provides factory supported warranty, parts, and service departments, as well as trained field service technicians. We also offer service repair manuals on CD-ROM to assist service personnel at the point of repair. CDs are available for all product categories and include instructions for parts breakdown, wiring diagrams, and service repair. CDs are updated quarterly and distributed to service dealers with changes, improvements, and/or new product information. The result is a responsive and knowledgeable warranty, parts, and service department

GenLink™ is a generator system management software that is written and supported by GENERAC. GenLink™ enables you to manage the generator directly from your computer, either remotely or on-site. GENERAC also offers SpecWriter®, a generator sizing software. SpecWriter will size your generator applications based on load requirements and environmental conditions.
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