Premium industrial power — best resale value, deepest parts network in the industry
20–4000 kW31 modelsdiesel, natural-gas
Why buyers choose CAT
Best resale value — CAT generators retain 15-25% more value than Cummins or MTU in the secondary market
Deepest parts network — ~200 US dealers, parts for models back to 1995 still in stock
Fleet standardization — one OEM across all heavy equipment reduces training and inventory complexity
Rural market coverage — strongest dealer density in secondary and rural US markets
Who CAT is for
Heavy industrial sites, large-frame applications (500 kW+), buyers who treat generators as capital assets with resale value, and rural or secondary markets where dealer density matters.
What to consider before specifying CAT
*20-40% price premium over comparable Cummins or Generac units
*Over-engineered for typical commercial standby — paying for industrial durability you may not need
*Exclusive dealer territory lock-in limits competitive service pricing
Caterpillar is the default specification for buyers who plan to own a generator for more than a decade. The combination of roughly 200 US dealers, parts availability back to 1995, and the strongest resale market in the power generation industry means that a CAT unit retains 15-25% more value than comparable Cummins or MTU generators at the same age and runtime hours. For mission-critical industrial applications — data centers, hospitals, water treatment — that long-term value proposition often outweighs the higher upfront cost.
The trade-off is real, though. CAT generators carry a price premium that ranges from 15% over Cummins to as much as 30% over volume players like Generac. For projects with a defined lifecycle under five years, or for rental fleet operators cycling equipment every 3-4 years, that premium rarely pays back. Kohler also outperforms CAT on raw power quality, with THD figures below 3% versus CAT's industry-standard 5-8% range — a meaningful difference for healthcare and semiconductor facilities.
The GC line, introduced to target the commercial standby segment, is CAT's acknowledgment that not every application needs a full industrial spec. GC units pair CAT engines with simplified controls and enclosures, narrowing the price gap with Cummins and Generac while keeping buyers inside the CAT dealer network. For commercial building owners who want the yellow iron without the industrial price tag, the GC line is worth evaluating — but buyers should understand that GC units do not carry the same resale premiums as CAT's industrial models.
Frequently asked questions
Why are Caterpillar generators more expensive than competitors?
CAT units typically carry a 15-25% price premium over comparable Cummins or MTU models. That premium buys you the strongest resale market in the industry — used CAT generators routinely sell for more than competing brands' units of the same age and hours — plus a parts ecosystem that stretches back to 1995.
When should you NOT spec a Caterpillar generator?
If total cost of ownership over a short deployment (under 5 years) is the primary driver, CAT's premium is hard to justify. For temporary or rental-fleet applications, Cummins or Generac deliver equivalent reliability at 10-15% less. CAT also lacks the ultra-low THD power quality that Kohler offers for sensitive healthcare loads.
What is the Caterpillar GC line?
The GC (Gas/Commercial) line is CAT's mid-tier product targeting commercial standby applications where the full industrial spec is unnecessary. GC units use CAT engines but simplified control panels and packaging, bringing the price closer to Generac and Cummins territory while retaining CAT dealer support.
Key specs at a glance
Power range
20–4000 kW standby
Fuel types
diesel, natural-gas, lpg
Engine OEMs
Caterpillar
Alternator OEMs
Caterpillar
Phase options
1-phase, 3-phase
Models in library
31
When to Specify Caterpillar
✓Preferred for mission-critical industrial applications where parts availability and global service network matter
✓Strongest product line above 1MW — CAT is the default for large industrial and utility applications
✓Deepest service network of any generator manufacturer — parts for models back to 1995 still in stock at ~200 US dealers
✓EMCP 4 controller platform is the industry standard for complex paralleling and power management
✓Best choice when uptime, global service reach, long-term parts availability, and resale value are priorities
1000 kW diesel with CAT 3512 V-12. Best resale value in class. ~200 US dealers with parts availability back decades.
1 MW standby · Diesel · Liquid-cooled
1000 kW diesel standby for Tier III data centers, large hospitals, and industrial campuses with CAT fleet.
1000-1400 kVA diesel generator with Cat 3512 V-12 engine. 51.8L displacement, Woodward governor, continuous/prime/standby ratings.
3-phasecommercial-standbyindustrial
Caterpillar
Cat 3512B
1500 kW diesel with CAT 3512B V-12. Best resale -- retains 15-25% more than Cummins/MTU. Deepest parts network.
1.5 MW standby · Diesel · Liquid-cooled
1500 kW diesel standby for Tier III+ data centers, large hospitals, and critical infrastructure.
1230-1500 kW diesel generator with Cat 3512B V-12 engine. EUI fuel system, EMCP 4.2B controller, mission-critical and standby ratings.
3-phasecommercial-standbymission-critical
Caterpillar
Cat 3516
1600 kW diesel with CAT 3516 V-16. Best resale -- retains 15-25% more than competitors. ~200 US dealer network.
1.6 MW standby · Diesel · Liquid-cooled
1600 kW diesel standby for large data centers, hospitals, and industrial campuses with CAT fleet standardization.
1600 kW diesel generator with Cat 3516 turbocharged V-16 engine. Mission-critical platform for data centers, hospitals, and large industrial standby and prime power.
3-phasedata-centerhospital
Caterpillar
Cat 3516B
2000 kW diesel with CAT 3516B V-16. Best resale value in class. Paralleling for multi-MW. ~200 US dealers.
2 MW standby · Diesel · Liquid-cooled
2000 kW diesel standby for Tier IV data centers, large hospitals, and campus-scale critical infrastructure.
2500 kW diesel with CAT 3516C V-16. EPA Tier 4 Final. Best resale in class. Paralleling for multi-MW arrays.
2.5 MW standby · Diesel · Liquid-cooled
2500 kW diesel standby for hyperscale data centers, campus microgrids, and emission-regulated industrial.
2500 kW diesel standby generator with Cat 3516C V-16 engine. The largest Cat genset platform for mission-critical data centers and industrial power.
Tier 23-phasedata-centerhospital-large
Caterpillar
Cat 3516E
3000 kW diesel with CAT 3516E V-16. Best resale value in class. Paralleling for multi-MW. ~200 US dealers.
3 MW standby · Diesel · Liquid-cooled
3000 kW diesel standby for hyperscale data centers, campus microgrids, and utility peak shaving.
Up to 3000 kW diesel generator with Cat 3516E V-16 engine. 78.1L displacement, Tier 2 equivalent, ATAAC aspiration for standby and mission-critical power.
Tier 23-phasecommercial-standbymission-critical
Caterpillar
Cat C15
500 kW diesel with CAT C15 ACERT inline-6. Best resale value in class. ~200 US dealers with deep parts inventory.
500 kW standby · Diesel · Liquid-cooled
500 kW diesel standby for hospitals, data centers, and large commercial with CAT fleet standardization.
500 kW diesel standby generator with Cat C15 ACERT engine. Large commercial standby for hospitals, high-rises, and municipal infrastructure.
Tier 23-phasehospitalhigh-rise
Caterpillar
Cat C175-16
3100 kW diesel with CAT C175-16 V-16. Medium-voltage capable (4160V/13.8kV). Best resale. Paralleling for multi-MW.
3.1 MW standby · Diesel · Liquid-cooled
3100 kW diesel standby for hyperscale data centers, campus microgrids, and mission-critical infrastructure.
2500-3100 kW diesel generator with Cat C175-16 SCAC V-16 engine. 84.7L displacement, Tier 2, mission-critical and standby power for data centers and large industrial facilities.
Tier 23-phasecommercial-standbymission-critical
Caterpillar
Cat C175-20
4000 kW diesel with CAT C175-20 V-20. CAT largest genset. Medium-voltage capable. Best resale in class.
4 MW standby · Diesel · Liquid-cooled
4000 kW diesel standby for hyperscale data centers, utility-scale backup, and campus microgrids.
Up to 4000 kW diesel generator with Cat C175-20 SCAC V-20 engine. 105.8L displacement, mission-critical and continuous duty power for large industrial and utility applications.
3-phasecommercial-standbymission-critical
Caterpillar
Cat C2.2
20 kW compact diesel with CAT C2.2 engine. Premium build quality. Best resale value. ~200 US dealer network.
20 kW standby · Diesel · Liquid-cooled
20 kW diesel standby for telecom shelters, small retail, and remote infrastructure sites.
20 kW diesel standby generator with Cat C2.2 naturally aspirated inline-4 engine. Compact EPA Interim Tier 4 platform for light commercial and essential standby applications.
80 kW compact diesel with CAT C4.4 turbo inline-4. Premium build quality. Best resale value. ~200 US dealer network.
80 kW standby · Diesel · Liquid-cooled
80 kW diesel standby for mid-size commercial, assisted living, and schools with CAT fleet.
80 kW diesel standby generator with Cat C4.4 turbocharged inline-4 engine. Reliable platform for commercial standby and prime power applications.
3-phasecommercial-standbyprime-power
Caterpillar
Cat DG200
200 kW natural gas with CAT DG200. No diesel storage needed. EPA certified for demand response. ~200 US dealers.
200 kW standby · Natural Gas / LPG · Liquid-cooled
200 kW natural gas standby/DR for commercial buildings, hospitals, and facilities on gas mains.
200 kW natural gas generator with 10.3L V8 engine. Emergency standby, demand response, and prime power for commercial and industrial applications.
3-phasecommercial-standbydemand-response
Caterpillar
Cat DG400
400 kW natural gas with CAT CG18 engine. EPA certified emergency and non-emergency. No diesel infrastructure needed.
400 kW standby · Natural Gas · Liquid-cooled
400 kW natural gas standby/DR for large commercial, hospitals, and campus facilities on gas mains.
400 kW natural gas generator with Cat CG18 inline-6 engine. Emergency standby, demand response, and limited time power for commercial applications.
3-phasecommercial-standbydemand-response
Caterpillar
Cat G3512
750 kW natural gas with CAT G3512 V-12. Continuous/prime rated. Biogas capable. Best resale in gas class.
750 kW standby · Natural Gas · Liquid-cooled
750 kW natural gas continuous/CHP for industrial cogeneration, distributed generation, and campus power.
750 kW natural gas generator with Cat G3512 turbocharged V-12 engine. Continuous and prime-rated platform for cogeneration, biogas, and distributed power.
3-phasecontinuous-powerprime-power
Caterpillar
Cat G3516H
1982 kW natural gas with CAT G3516H V-16. 43.5% electrical efficiency. Cogeneration-ready. Best resale in class.
2.0 MW standby · Natural Gas · Liquid-cooled
1982 kW natural gas continuous/CHP for industrial cogeneration, distributed generation, and utility power.
1982 kW continuous natural gas generator with Cat G3516H V-16 engine. High-efficiency combined heat and power for industrial, utility, and distributed generation.
3-phasecogenerationdistributed-generation
Caterpillar
Cat G3516H
2027 kW natural gas with CAT G3516H V-16. Medium-voltage capable. Cogeneration-ready. Best resale in class.
2.0 MW standby · Natural Gas · Liquid-cooled
2027 kW natural gas continuous/cogeneration for industrial CHP, distributed generation, and campus power.
Up to 2027 kW natural gas generator with Cat G3516H V-16 engine. Continuous duty, low-emission gas power for cogeneration, distributed generation, and industrial applications.
2022 kW natural gas with CAT G3520E V-20. 41.5% electrical efficiency. Cogeneration-ready. Best resale in class.
2.0 MW standby · Natural Gas · Liquid-cooled
2022 kW natural gas continuous/CHP for industrial cogeneration, distributed generation, and baseload power.
2022 kW continuous natural gas generator with Cat G3520E V-20 engine. High-efficiency CHP platform for industrial, utility, and distributed generation.
3-phasecogenerationdistributed-generation
Caterpillar
Cat G3520H
2519 kW natural gas with CAT G3520H V-20. Medium-voltage capable. Hydrogen-blend ready. Best resale in class.
2.5 MW standby · Natural Gas · Liquid-cooled
2519 kW natural gas continuous/cogeneration for industrial CHP, distributed generation, and campus power.
Up to 2519 kW natural gas generator with Cat G3520H V-20 engine. 97.5L displacement, continuous duty, hydrogen-blend capable for cogeneration and distributed generation.
3-phasecontinuous-dutycogeneration
Caterpillar
Caterpillar 3406
350 kW diesel with legendary CAT 3406 engine. Best resale -- retains 15-25% more than Cummins/MTU. Parts back to 1995.
350 kW standby · Diesel · Liquid-cooled
350 kW diesel standby for industrial plants, water treatment, and large commercial with fleet standardization.
The Caterpillar 3406C is a 275-400 kW diesel generator built on the legendary 14.64L inline-6. Legacy platform with one of the broadest parts ecosystems in the diesel industry. Specs from OEM data sheet.
3-phasecommercial-standbyindustrial
Caterpillar
Caterpillar 3412
720 kW diesel with legendary CAT 3412 engine. Best resale -- retains 15-25% more than competitors. Parts back to 1995.
720 kW standby · Diesel · Liquid-cooled
720 kW diesel standby for large industrial, hospitals, and mission-critical facilities with CAT fleet standardization.
The Caterpillar 3412C is a 680-900 kVA diesel generator built on the 27.02L V12 engine. ADEM A5 governor. Fuel: 45.3 gal/hr at full load. Legacy platform for hospitals, campuses, and industrial sites.
3-phasehospital-largeindustrial
Caterpillar
Caterpillar 3512C
1500 kW diesel with CAT 3512C V-12. EPA Tier 4 Final. Best resale value in class. ~200 US dealers.
1.5 MW standby · Diesel · Liquid-cooled
1500 kW diesel standby for Tier III+ data centers, hospitals, and emission-sensitive industrial sites.
The Caterpillar 3512C is a 1500 kW standby diesel generator. 51.8L V12 ATAAC, 14.7:1 compression, EPA Tier 2. Fuel: 104.6 gal/hr at full load. Medium-voltage outputs to 13,800V for mission-critical applications.
Tier 23-phasedata-centerhospital-large
Caterpillar
Caterpillar C13
350 kW diesel with CAT C13 ACERT inline-6. Best resale -- retains 15-25% more than competitors. ~200 US dealers.
350 kW standby · Diesel · Liquid-cooled
350 kW diesel standby for hospitals, large commercial, and industrial with CAT fleet standardization.
The Caterpillar C13 ACERT is a 350 kW standby diesel generator with EPA Tier 3 certification. 12.5L inline-6 with MEUI injection. Fuel consumption 24.9 gal/hr at full load. Complete specs and service reference.
Tier 33-phasecommercial-standbyhospital-medium
Caterpillar
Caterpillar C18
600 kW diesel with CAT C18 ACERT inline-6. Best resale -- retains 15-25% more than Cummins/MTU. ~200 US dealers.
600 kW standby · Diesel · Liquid-cooled
600 kW diesel standby for large data centers, hospitals, and industrial plants with CAT fleet.
The Caterpillar C18 ACERT is a 600 kW standby diesel generator with EPA Tier 2 certification. 18.1L inline-6 with MEUI injection. Fuel: 42.7 gal/hr at full load. Supports 4160V medium-voltage for hospital and campus applications.
Tier 23-phasehospital-mediumcampus
Caterpillar
Caterpillar C7
200 kW diesel with CAT C7 ACERT inline-6. Best resale value in class. ~200 US dealers. Compact footprint.
200 kW standby · Diesel · Liquid-cooled
200 kW diesel standby for retail, telecom, and small commercial with CAT fleet standardization.
The Caterpillar C7.1 ACERT is a 200 kW standby diesel generator with EPA Tier 3 certification. 7.01L inline-6 with MEUI fuel injection. Compact standby power for small commercial and retail applications.
Tier 33-phasecommercial-standbyretail
Caterpillar
Caterpillar C9
250 kW diesel with CAT C9 ACERT inline-6. Best resale -- retains 15-25% more than competitors. ~200 US dealers.
250 kW standby · Diesel · Liquid-cooled
250 kW diesel standby for mid-size commercial, schools, and light-industrial with CAT fleet.
The Caterpillar C9 ACERT is a 250 kW standby diesel generator with EPA Tier 3 emissions certification. 8.8L inline-6 with MEUI fuel injection. Ideal for retail, telecom, and light-industrial standby applications.
Tier 33-phasecommercial-standbyretail
Caterpillar
Caterpillar G3406
300 kW natural gas with CAT G3406 inline-6. No diesel storage needed. Legacy platform with deep parts availability.
300 kW standby · Natural Gas · Liquid-cooled
300 kW natural gas standby for hospitals, commercial campuses, and facilities on gas mains.
The Caterpillar G3406 is a natural gas standby generator built on the 14.6L G3406 TA inline-6 spark-ignited engine. No diesel fuel storage required. Legacy platform for hospitals, campuses, and commercial facilities.
512 kW natural gas with CAT G3412 V-12. No diesel infrastructure needed. EMCP 4 controller. ~200 US dealers.
512 kW standby · Natural Gas · Liquid-cooled
512 kW natural gas standby for large hospitals, campuses, and data centers on gas mains.
The Caterpillar G3412 is a 512 kW standby natural gas generator built on the 27L V12 G3412C engine. EPA Subpart JJJJ certified. EMCP 4 controller. Dry weight 14,330 lb. Complete specs from OEM sheet.