Used Generators for Sale
Used generators are industrial power systems designed to produce electricity for continuous operation, backup power, or on-site energy generation. These systems are widely used across manufacturing, energy, chemical processing, and utilities where reliable power supply is critical. Generators support operations ranging from emergency backup to full-scale power generation in remote or grid-independent environments. Aaron Equipment offers used generators for sale in a variety of configurations, fuel types, and capacities to meet specific power requirements and operational demands. Browse available inventory below or explore generator types to find equipment aligned with your application.
Stock No.:
54541001Unused MTU Rolls-Royce DS900 900 kW Diesel Generator Set – Tier 2 Emergency Standby – UL2200 – Built 2024
Unused MTU Rolls-Royce DS900 900 kW Diesel Generator Set Tier 2 Emergency Standby UL2200 Built 2024. Rated 900 kW/1125 kV. MTU 22.4L Diesel Engine, 1800 RPM, EPA Tier 2 Certified for Emergency Standby. Permanent Magnet Generator Alternator with Digital Voltage Regulator & Generator Strip Heater. Sound Level 3 Enclosure with Vertical Air Discharge, Steel Construction, 130 MPH Wind Load Rated, 74.9 dBA, Space Heater, Motorized Intake Louvers. Internally Mounted Silencer within Enclosure, Critical Grade. MGC-3050 Digital Control Panel, Mounted Left Side, Paralleling Capabilities. ModBus TCP/IP Communications. Remote Mounted Annunciator, Meets NFPA 110 Level 1. Remote Mounted Emergency Stop, Break Glass Station, Nema 3R For Outdoor Installation. 1200 Amp Breaker, 3-Pole, 100% Rated with Electronic LSI Trip, Mounted Right Side, Motor Operated Block. 5000W, 1ph, 208V Heater. 10 Amp, 24VDC / 120VAC 1ph Battery Charger. NFPA-110 Level 1 Compliance, UL2200 Listed Fuel Tank: 1515 Gallon, 24 Hour Run Time at Full Load, UL 142 Listed. Built 2024.
MFR: MTU Onsite Energy
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54541002Rolls-Royce MTU DS900 Diesel Generator – 900 kW Emergency Power System – Unused
Rolls-Royce MTU DS900 Diesel Generator 900 kW Emergency Power System Unused. Rated 900 kW/1125 kV. MTU 22.4L Diesel Engine, 1800 RPM, EPA Tier 2 Certified for Emergency Standby. Permanent Magnet Generator Alternator with Digital Voltage Regulator & Generator Strip Heater. Sound Level 3 Enclosure with Vertical Air Discharge, Steel Construction, 130 MPH Wind Load Rated, 74.9 dBA, Space Heater, Motorized Intake Louvers. Internally Mounted Silencer within Enclosure, Critical Grade. MGC-3050 Digital Control Panel, Mounted Left Side, Paralleling Capabilities. ModBus TCP/IP Communications. Remote Mounted Annunciator, Meets NFPA 110 Level 1. Remote Mounted Emergency Stop, Break Glass Station, Nema 3R For Outdoor Installation. 1200 Amp Breaker, 3-Pole, 100% Rated with Electronic LSI Trip, Mounted Right Side, Motor Operated Block. 5000W, 1ph, 208V Heater. 10 Amp, 24VDC / 120VAC 1ph Battery Charger. NFPA-110 Level 1 Compliance, UL2200 Listed Fuel Tank: 1515 Gallon, 24 Hour Run Time at Full Load, UL 142 Listed. Built 2024.
MFR: MTU Onsite Energy
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54541003900 kW MTU Generator Set with Paralleling Controls & UL2200 Certification
Unused- 900 kW MTU Generator Set with Paralleling Controls & UL2200 Certification. Rated 900 kW/1125 kV. MTU 22.4L Diesel Engine, 1800 RPM, EPA Tier 2 Certified for Emergency Standby. Permanent Magnet Generator Alternator with Digital Voltage Regulator & Generator Strip Heater. Sound Level 3 Enclosure with Vertical Air Discharge, Steel Construction, 130 MPH Wind Load Rated, 74.9 dBA, Space Heater, Motorized Intake Louvers. Internally Mounted Silencer within Enclosure, Critical Grade. MGC-3050 Digital Control Panel, Mounted Left Side, Paralleling Capabilities. ModBus TCP/IP Communications. Remote Mounted Annunciator, Meets NFPA 110 Level 1. Remote Mounted Emergency Stop, Break Glass Station, Nema 3R For Outdoor Installation. 1200 Amp Breaker, 3-Pole, 100% Rated with Electronic LSI Trip, Mounted Right Side, Motor Operated Block. 5000W, 1ph, 208V Heater. 10 Amp, 24VDC / 120VAC 1ph Battery Charger. NFPA-110 Level 1 Compliance, UL2200 Listed Fuel Tank: 1515 Gallon, 24 Hour Run Time at Full Load, UL 142 Listed. Built 2024.
MFR: MTU Onsite Energy
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54541004Industrial MTU Rolls-Royce 900 kW Diesel Generator for Mission-Critical Standby Power
Unused- Industrial MTU Rolls-Royce 900 kW Diesel Generator for Mission-Critical Standby Power. Rated 900 kW/1125 kV. MTU 22.4L Diesel Engine, 1800 RPM, EPA Tier 2 Certified for Emergency Standby. Permanent Magnet Generator Alternator with Digital Voltage Regulator & Generator Strip Heater. Sound Level 3 Enclosure with Vertical Air Discharge, Steel Construction, 130 MPH Wind Load Rated, 74.9 dBA, Space Heater, Motorized Intake Louvers. Internally Mounted Silencer within Enclosure, Critical Grade. MGC-3050 Digital Control Panel, Mounted Left Side, Paralleling Capabilities. ModBus TCP/IP Communications. Remote Mounted Annunciator, Meets NFPA 110 Level 1. Remote Mounted Emergency Stop, Break Glass Station, Nema 3R For Outdoor Installation. 1200 Amp Breaker, 3-Pole, 100% Rated with Electronic LSI Trip, Mounted Right Side, Motor Operated Block. 5000W, 1ph, 208V Heater. 10 Amp, 24VDC / 120VAC 1ph Battery Charger. NFPA-110 Level 1 Compliance, UL2200 Listed Fuel Tank: 1515 Gallon, 24 Hour Run Time at Full Load, UL 142 Listed. Built 2024.
MFR: MTU Onsite Energy
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54541005MTU DS900 900 kW Industrial Backup Generator with 24-Hour Fuel Tank – Built 2024
Unused- MTU DS900 900 kW Industrial Backup Generator with 24-Hour Fuel Tank - Built 2024. Rated 900 kW/1125 kV. MTU 22.4L Diesel Engine, 1800 RPM, EPA Tier 2 Certified for Emergency Standby. Permanent Magnet Generator Alternator with Digital Voltage Regulator & Generator Strip Heater. Sound Level 3 Enclosure with Vertical Air Discharge, Steel Construction, 130 MPH Wind Load Rated, 74.9 dBA, Space Heater, Motorized Intake Louvers. Internally Mounted Silencer within Enclosure, Critical Grade. MGC-3050 Digital Control Panel, Mounted Left Side, Paralleling Capabilities. ModBus TCP/IP Communications. Remote Mounted Annunciator, Meets NFPA 110 Level 1. Remote Mounted Emergency Stop, Break Glass Station, Nema 3R For Outdoor Installation. 1200 Amp Breaker, 3-Pole, 100% Rated with Electronic LSI Trip, Mounted Right Side, Motor Operated Block. 5000W, 1ph, 208V Heater. 10 Amp, 24VDC / 120VAC 1ph Battery Charger. NFPA-110 Level 1 Compliance, UL2200 Listed Fuel Tank: 1515 Gallon, 24 Hour Run Time at Full Load, UL 142 Listed. Built 2024.
MFR: MTU Onsite Energy
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54541006Unused 900 kW MTU Diesel Generator with Sound Attenuated Enclosure & Digital Controls
Unused 900 kW MTU Diesel Generator with Sound Attenuated Enclosure & Digital Controls. Rated 900 kW/1125 kV. MTU 22.4L Diesel Engine, 1800 RPM, EPA Tier 2 Certified for Emergency Standby. Permanent Magnet Generator Alternator with Digital Voltage Regulator & Generator Strip Heater. Sound Level 3 Enclosure with Vertical Air Discharge, Steel Construction, 130 MPH Wind Load Rated, 74.9 dBA, Space Heater, Motorized Intake Louvers. Internally Mounted Silencer within Enclosure, Critical Grade. MGC-3050 Digital Control Panel, Mounted Left Side, Paralleling Capabilities. ModBus TCP/IP Communications. Remote Mounted Annunciator, Meets NFPA 110 Level 1. Remote Mounted Emergency Stop, Break Glass Station, Nema 3R For Outdoor Installation. 1200 Amp Breaker, 3-Pole, 100% Rated with Electronic LSI Trip, Mounted Right Side, Motor Operated Block. 5000W, 1ph, 208V Heater. 10 Amp, 24VDC / 120VAC 1ph Battery Charger. NFPA-110 Level 1 Compliance, UL2200 Listed Fuel Tank: 1515 Gallon, 24 Hour Run Time at Full Load, UL 142 Listed. Built 2024.
MFR: MTU Onsite Energy
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54541007MTU Rolls-Royce 900 kW Standby Generator – Tier 2 Diesel Engine – Unused 2024
MTU Rolls-Royce 900 kW Standby Generator Tier 2 Diesel Engine Unused 2024. Rated 900 kW/1125 kV. MTU 22.4L Diesel Engine, 1800 RPM, EPA Tier 2 Certified for Emergency Standby. Permanent Magnet Generator Alternator with Digital Voltage Regulator & Generator Strip Heater. Sound Level 3 Enclosure with Vertical Air Discharge, Steel Construction, 130 MPH Wind Load Rated, 74.9 dBA, Space Heater, Motorized Intake Louvers. Internally Mounted Silencer within Enclosure, Critical Grade. MGC-3050 Digital Control Panel, Mounted Left Side, Paralleling Capabilities. ModBus TCP/IP Communications. Remote Mounted Annunciator, Meets NFPA 110 Level 1. Remote Mounted Emergency Stop, Break Glass Station, Nema 3R For Outdoor Installation. 1200 Amp Breaker, 3-Pole, 100% Rated with Electronic LSI Trip, Mounted Right Side, Motor Operated Block. 5000W, 1ph, 208V Heater. 10 Amp, 24VDC / 120VAC 1ph Battery Charger. NFPA-110 Level 1 Compliance, UL2200 Listed Fuel Tank: 1515 Gallon, 24 Hour Run Time at Full Load, UL 142 Listed. Built 2024.
MFR: MTU Onsite Energy
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545410082024 MTU Rolls-Royce DS900 900 kW Diesel Generator Set – UL2200 Listed & NFPA 110 Level 1
Unused- 2024 MTU Rolls-Royce DS900 900 kW Diesel Generator Set UL2200 Listed & NFPA 110 Level 1. Rated 900 kW/1125 kV. MTU 22.4L Diesel Engine, 1800 RPM, EPA Tier 2 Certified for Emergency Standby. Permanent Magnet Generator Alternator with Digital Voltage Regulator & Generator Strip Heater. Sound Level 3 Enclosure with Vertical Air Discharge, Steel Construction, 130 MPH Wind Load Rated, 74.9 dBA, Space Heater, Motorized Intake Louvers. Internally Mounted Silencer within Enclosure, Critical Grade. MGC-3050 Digital Control Panel, Mounted Left Side, Paralleling Capabilities. ModBus TCP/IP Communications. Remote Mounted Annunciator, Meets NFPA 110 Level 1. Remote Mounted Emergency Stop, Break Glass Station, Nema 3R For Outdoor Installation. 1200 Amp Breaker, 3-Pole, 100% Rated with Electronic LSI Trip, Mounted Right Side, Motor Operated Block. 5000W, 1ph, 208V Heater. 10 Amp, 24VDC / 120VAC 1ph Battery Charger. NFPA-110 Level 1 Compliance, UL2200 Listed Fuel Tank: 1515 Gallon, 24 Hour Run Time at Full Load, UL 142 Listed. Built 2024.
MFR: MTU Onsite Energy
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54541009Unused MTU Rolls-Royce DS900 900 kW Emergency Standby Diesel Generator with 1,515 Gallon Fuel Tank
Unused MTU Rolls-Royce DS900 900 kW Emergency Standby Diesel Generator with 1,515 Gallon Fuel Tank. Rated 900 kW/1125 kV. MTU 22.4L Diesel Engine, 1800 RPM, EPA Tier 2 Certified for Emergency Standby. Permanent Magnet Generator Alternator with Digital Voltage Regulator & Generator Strip Heater. Sound Level 3 Enclosure with Vertical Air Discharge, Steel Construction, 130 MPH Wind Load Rated, 74.9 dBA, Space Heater, Motorized Intake Louvers. Internally Mounted Silencer within Enclosure, Critical Grade. MGC-3050 Digital Control Panel, Mounted Left Side, Paralleling Capabilities. ModBus TCP/IP Communications. Remote Mounted Annunciator, Meets NFPA 110 Level 1. Remote Mounted Emergency Stop, Break Glass Station, Nema 3R For Outdoor Installation. 1200 Amp Breaker, 3-Pole, 100% Rated with Electronic LSI Trip, Mounted Right Side, Motor Operated Block. 5000W, 1ph, 208V Heater. 10 Amp, 24VDC / 120VAC 1ph Battery Charger. NFPA-110 Level 1 Compliance, UL2200 Listed Fuel Tank: 1515 Gallon, 24 Hour Run Time at Full Load, UL 142 Listed. Built 2024.
MFR: MTU Onsite Energy
Stock No.:
49317050Used Cummins 750 kW Diesel Generator – DQFAA, Tier 2, 480V Capable, UL2085 Tank, Passed Load Test
Used-750 kW standby (680 kW prime) Cummins diesel generator set, model DQFAA, SN-H070098040. Cummins QST30-G5 engine rated 1490 HP at 1800 RPM, SN-37229540, EPA Tier 2 emissions. 3/60/120/208V, 12 lead reconnectable to 480V and other voltages. 2500 Amp 100% rated main-line circuit breaker. PMG permanent magnet generator. Oversized 1040 kW rated generator end. Engine cooling radiator rated 50C/122F ambient. UL 2200 listed stationary engine-generator-assembly. PowerCommand 2100 digital control panel. EnerGenius battery charger 10 amp 120/208/240V. Coolant heater 208/240/480V. Aluminum sound attenuated enclosure. 3600 gallon UL2085 sub-base fuel tank, with secondary containment. 792 Hours. Year 2007. Overall dimensions 113W x 341L x 165H, 60,000 lbs. (storage trailer in photo not included) Passed load test 2/11/2025.
MFR: Cummins
Stock No.:
53126014OG-375 oxygen concentrator
Used- OG-375 oxygen concentrator Industrial design uses steel zeolite towers and rebuildable solenoid valves for a easy to maintain system that will never wear out or become obsolete. Features Produces 375 SCFH oxygen at up to 45 PSI Industrial heavy-duty design and quality oxygen concentrator Energy efficient oxygen concentrators require less compressed air for operation High oxygen outlet pressure 45 PSI standard, up to 65 PSI outlet pressure available Completely rebuild-able and easy to maintain design will offer many years of operation More Information Weight 1.35 lbs (0.61 kg) Dimensions 30" x 36" x 84" (76.2 x 91.4 x 213.4 cm) LxWxH Warranty 1 Year Max Pressure 45 PSI (3.16 Bar) Higher pressure systems available Oxygen Connection 3/8-inch NPT Inlet/Outlet Connections 3/8-inch NPT Integrated Compressor No 68 CFM @ 90 PSI required Oxygen Flow Rate 176.98 LPM (375 SCFH) The OG-375 will require an air tank and an oxygen tank for proper operation.
Stock No.:
53393004Used – Clark Centrifugal Compressor Model C/T 20341, Size 2M – 5089 CFM, 9 Impellers, w/ GE 1750 HP Motor
Used- Clark Centrifugal Compressor, Model C/T 20341, Size 2M. 9 Impellers. Carbon Steel. 5089CFM inlet capacity, 9100 rpm maximum continuous speed. 315 degrees F maximum operating temperature, 225psi inlet pressure and 270psi discharge pressure. 8", 12" Top Openings. Western Gear Box 1-5.1111:1 Ratio. Repaired by Dresser-Rand in 2006. Serial# 2-9-2610. Includes GE Custom 8000 Induction Motor Rated 1750hp 3/60/4000v 1786rpm, with enclosure.
MFR: Clark
Types of Used Generators Available
Aaron Equipment offers a range of used generators designed to support power generation, backup power, and energy recovery applications:
Cogeneration Plants – Combined heat and power (CHP) systems that generate electricity while capturing and utilizing waste heat for increased efficiency.
Diesel Fuel & Natural Gas Fuel Generators – Versatile generators powered by diesel or natural gas, commonly used for standby, prime, or continuous power applications.
Steam Turbine Generators – Systems that convert steam energy into electrical power, typically used in large-scale industrial and utility operations.
Gas Turbine Generators – High-capacity generators that use combustion turbines for efficient power generation in industrial and energy sectors.
Miscellaneous Generators – Various generator systems and configurations designed to support specialized or unique power generation applications.
Generator Applications & Industry Uses
Used generators are essential across industries where reliable electrical power is required for operations, backup, or energy independence. Common applications include:
Manufacturing Facilities: Backup and primary power supply for continuous production
Chemical Processing: Power generation for critical processing systems and utilities
Energy & Utilities: On-site and distributed power generation systems
Oil & Gas: Remote power supply for drilling and processing operations
Data Centers & Infrastructure: Emergency backup power to maintain uptime
These systems help ensure operational continuity, reduce downtime, and provide energy flexibility across industrial environments.
Used Generator Buying Considerations
When selecting a used generator, it is important to evaluate both power requirements and equipment condition:
Power Output (kW/MW): Match generator capacity to load requirements
Fuel Type: Diesel, natural gas, or turbine-based depending on availability and cost
Duty Cycle: Standby, prime, or continuous operation requirements
Efficiency & Emissions: Evaluate fuel consumption and regulatory compliance
Control Systems: Assess automation, monitoring, and integration capabilities
Condition & Maintenance History: Review service records and operational hours
Why Buy Used Generators
Buying used generators provides a cost-effective solution for securing reliable power without the long lead times of new systems. Used generators offer proven performance and are often available for immediate deployment, helping facilities maintain uptime and reduce capital investment.
Aaron Equipment sources high-quality generator systems from leading manufacturers, providing dependable power solutions for a wide range of industrial applications.
Sell Your Used Generators
Aaron Equipment actively purchases surplus generators, including diesel, gas turbine, and cogeneration systems. Whether upgrading equipment or decommissioning assets, our team can help maximize value.
An industrial generator is a system that converts mechanical energy into electrical power. It is used to supply electricity for industrial operations, either as a primary power source or backup system.
Common types include diesel generators, natural gas generators, steam turbine generators, gas turbine generators, and cogeneration systems. Each type is suited for different power capacities and applications.
Choosing the right generator depends on required power output, fuel availability, operating conditions, and whether the system will be used for standby or continuous operation.
Yes. Used generators are built for long service life and can remain highly reliable when properly maintained, inspected, and tested prior to purchase.
Generators are used in manufacturing, chemical processing, energy production, oil and gas, and infrastructure sectors where reliable power is essential.