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.:
51188012Used Siemens EK1000-2 6.56 MW Steam Turbine Generator Plant
Used- Siemens 6.56 MW Steam Turbine Generator Plant, Model EK1000-2, Manufactured 1981. Siemens Model EK1000-2 multistage extraction/condensing steam turbine generator system, rated at 6,560 kW (6.56 MW) shaft output, manufactured in Germany in 1981, Serial No. T5719. Turbine designed for operation at 9,000 RPM with live steam pressure of 48.3 bar (700 PSI) at 404C (759F), intermediate steam extraction pressure of 7.3 bar (106 PSI), and condensing exhaust design pressure of 12 kPa absolute. Equipped with Siemens 6:1 speed reduction gearbox, rated at 6,900 kW continuous duty, reducing turbine speed from 9,000 RPM to 1,500 RPM. Driven generator is a Siemens Model 1DU7534-7FE82-Z three-phase synchronous alternator, Serial No. D8025106101, rated at 8,200 kVA, 11,000 volts, 50 Hz, 1,500 RPM, with 0.8 power factor. System includes associated excitation equipment, electrical control and protection panels, Siemens and GE protection components, SEL digital relays, DECS-250 digital excitation controller, lubrication system with approximately 6,300-liter oil reservoir, and (2) Alfa Laval Model M10-BDFG plate heat exchangers manufactured in 2021. Associated plant equipment includes main steam condenser and steam dump condenser, subject to confirmation of sale scope. Turbine and gearbox underwent extensive major inspection and maintenance in JulyAugust 2023, including rotor removal, internal inspections, non-destructive testing, rotor dynamic balancing, gearbox inspection, bearing inspection, generator electrical testing, and vibration assessment. Inspection records reported acceptable gearbox condition and low post-commissioning vibration levels at that time. Main condenser was retubed in 2012 and inspected in 2023. Originally installed as part of an industrial cogeneration and energy recovery system at a sulphuric acid production facility. Complete engineering documentation, maintenance records, mechanical drawings, electrical schematics, and inspection reports available.
Stock No.:
54432001Used Olympian G60F3 Natural Gas Generator – 60 kW Standby Power Generator with Weather Enclosure (Low Hours)
Used- Olympian Natural Gas Generator, Model G60F3. Rated standby power 60 kW, 75 kVA. Weather enclosure. Engine operates at 1,800 RPM. 3/60/120/208V. 163.2 Hours run. Serial# OLY00000JNGD01498, built 2008.
MFR: Olympian
Stock No.:
49317033Used MTU 600 kW Standby (550 kW prime) Diesel Generator Set - Model DS600
Used- MTU 600 kW Standby (550 kW prime) Diesel Generator Set, Model DS600, SN-321178-1-1-0510. MTU 12V1600G80S engine rated 896 HP at 1800 RPM, SN-16701001344, EPA Tier 2 emissions. 3/60/120/208V, 12 lead reconnectable to other voltages. 2000 Amp adjustable main-line circuit breaker. PMG permanent magnet generator. Engine cooling radiator rated 50C/122F ambient. UL listed stationary engine generator assembly. Basler DGC-2020 digital control panel. Battery charger. Coolant heater. Weather enclosure. 1000 gallon sub-base fuel tank with secondary containment. 293 Hrs. Year 2010. 86W x 170L x 144H, 20,000 lbs. Passed load test 6/11/2024.
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.:
54529001Unused Generac SG080 Natural Gas Generator – 80 kW Standby Power System in Sound Attenuated Enclosure
Unused Generac SG080 Natural Gas Generator 80 kW Standby Power System in Sound Attenuated Enclosure. Rated 80kW 100KVA. 3/60/120-208V, 1800 RPM. Driven by a 128hp Generac 4 Cylinder In-Line Motor. 10A UL Battery Charger, Sound Attenuated Enclosure. Serial# 3015646902, Built 2024.
MFR: Generac
Stock No.:
49317060Used Caterpillar 800 kW Diesel Generator Set – CAT 3412, 1180 HP, 480V, 852 Hours, Enclosed with Fuel Tank
Used- Caterpillar Diesel Generator Set, Rated 800 kW (725 kW prime). CAT 3412 engine rated 1180 HP at 1800 RPM, SN-2WJ06072. 3/60/277480V, 6 lead non-reconnectable to other voltages. 2500 Amp main-line circuit breaker. PMG - Permanent magnet generator. EMCP II+ digital control panel. Battery charger. Coolant heater. Sound attenuated enclosure. 1600 gallon sub-base fuel tank. 852 Hours. Year 2000.
MFR: Caterpillar
Stock No.:
54376001Used Olympian D90P1 Trailer-Mounted Diesel Generator – 90 kW, Perkins Engine, 258 Hours
Used- Olympian Trailered Diesel Generator, Model D90P1. Rated 90 kW, 112.5 KVA, 82.3 Prime Kw (103 Prime KVA). Rated 3/60/277/480V 1600rpm. Perkins 4-Cycle Motor. Mounted on a custom built trailer. 258 hours, Serial # OLY00000KNPS02059, Built 2005.
MFR: Olympian
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
Stock No.:
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
Stock No.:
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
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.