Used Diesel Fuel Generators & Natural Gas Fuel Generators for Sale
Diesel and natural gas fuel generators are industrial power generation systems designed to provide reliable electricity for primary, standby, or backup applications. These generators convert fuel into electrical energy to support critical operations in facilities where power continuity is essential. Used diesel fuel generators and natural gas fuel generators are widely used in manufacturing, oil and gas, healthcare, data centers, and commercial operations requiring dependable on-site power. Browse available inventory below to find generator systems that meet your power output and operational requirements.
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.:
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.:
54562001Used Caterpillar 3412 800 kW Diesel Generator Set
Used Caterpillar 800 kW (725 kW prime) Diesel Generator Set. SN-ADJN01024. CAT 3412 engine rated 1180 HP at 1800 RPM, SN-1EZ08710. 3/60/480V, 12 lead reconnectable to other voltages. 1200 Amp main-line circuit breaker. PMG - Permanent magnet generator. EMCP II digital control panel. Battery charger. Coolant heater. Sound attenuated enclosure. sub-base fuel tank with secondary containment. 326 Hours. Year 2006. Load test pending. Overall dimensions 89"W x 207"L x 101"H, 24,000 lbs.
MFR: Cat
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
Diesel and Natural Gas Generator Applications & Typical Use Cases
Used generators are deployed across industries where consistent and reliable power is required. Typical applications include:
Backup power for manufacturing plants and processing facilities
Prime power generation in remote or off-grid locations
Emergency power supply for hospitals, data centers, and critical infrastructure
Supporting oil and gas operations and field equipment
Providing temporary power for construction sites and industrial projects
When to Choose Diesel vs. Natural Gas Generators
The choice between diesel and natural gas generators depends on fuel availability, runtime requirements, and operational priorities. Diesel generators are often selected for their high power density, durability, and ability to handle variable loads. Natural gas generators are preferred in facilities with existing gas infrastructure, offering cleaner emissions and continuous fuel supply without the need for on-site storage.
Used Generator Buying Considerations
When evaluating a used diesel or natural gas generator, consider the following:
Power Rating (kW/kVA): Ensure output capacity matches load requirements
Fuel Type & Availability: Diesel vs. natural gas based on site infrastructure
Run Hours & Maintenance History: Indicator of wear and remaining service life
Voltage & Frequency Requirements: Compatibility with facility systems
Enclosure & Mobility: Skid-mounted, trailer-mounted, or enclosed units
Control Systems & Compliance: Monitoring capabilities and emissions requirements
Why Buy Used Diesel and Natural Gas Generators
Used generators provide a practical way to secure power generation capacity without the lead times associated with new units. Many systems are maintained as backup equipment and may have relatively low run hours. For facilities preparing for outages, expanding operations, or adding redundancy, used generators offer a dependable and cost-conscious solution.
Sell Your Used Diesel Fuel and Natural Gas Generators
If you are rotating out backup units or downsizing power capacity, Aaron Equipment can help reposition surplus generators within active resale channels. We work with sellers to evaluate equipment and connect it with buyers seeking reliable power systems for industrial and commercial use.
A diesel or natural gas generator is a power generation system that converts fuel into electricity using an internal combustion engine. These generators are used for backup, standby, or primary power in industrial and commercial applications.
They are used to provide reliable power for facilities during outages, in remote locations, or as part of continuous operations. Common applications include manufacturing, healthcare, data centers, and energy production environments.
Diesel generators typically offer higher power density and are well-suited for backup or variable load applications. Natural gas generators provide cleaner emissions and are often used where a continuous fuel supply is available through existing gas infrastructure.
Costs vary based on power rating, fuel type, run hours, manufacturer, and overall condition. Higher-capacity or low-hour units generally carry greater value, especially when configured for industrial or critical power applications.
Yes. Aaron Equipment purchases used diesel and natural gas generators. Our team can review system details and help facilitate resale or direct purchase opportunities.