Natural gas is the preferred fuel for residential, light-commercial, and gaseous-only industrial standby applications below ~600 kW. Utility-supplied gas eliminates on-site fuel storage, simplifies AHJ approval (no UL 142 tank), and keeps PM intervals long under standby duty. Capacity is constrained by utility supply pressure (typically 5–14" WC residential, up to 5 PSI commercial) and by the engine's published BTU/hr at full load. Below are gaseous standby models in our service portfolio with manufacturer specs and field notes.
107 models in this category.
Need help selecting a natural gas backup generators?
Our application engineers help size, spec, and source backup power for commercial, industrial, and mission-critical sites.
100 kW standby · Natural Gas / LPG · Liquid-cooled
100 kW natural gas standby generator (80 kW on LP) from Blue Star Power Systems. PSI 5.7LTCAC turbocharged charge-air-cooled V8, Stamford UCI274C alternator, DSE DCP7310 controller, 208-600V output.
55 kW prime / 60 kW standby natural gas / LP generator from Blue Star Power Systems. PSI 5.7L eight-cylinder V8 with catalyst/silencer, Stamford UCI224E alternator, DSE DCP7310 controller, 208-600V output.
1.1 MW standby · Natural Gas / LPG · Liquid-cooled
1050 kW natural gas / LP standby generator from Blue Star Power Systems. PSI 53L V16 turbocharged-aftercooled, DSE DCP7310 controller, three-phase 480-4160V.
1.1 MW standby · Natural Gas / LPG · Liquid-cooled
900 kW prime-rated natural gas / LP generator from Blue Star Power Systems. PSI 53L V16 turbocharged-aftercooled, DSE DCP7310 controller, three-phase 480-4160V.
1250 kW natural-gas-only standby generator from Blue Star Power Systems. PSI 53LHO high-output V16 turbocharged-aftercooled, DSE DCP7310 controller, three-phase 480-4160V. LP not available.
150 kW standby · Natural Gas / LPG · Liquid-cooled
125 kW prime-rated natural gas / LP generator from Blue Star Power Systems. PSI 8.1LT inline-six, DSE DCP7310 controller, 208-600V, continuous prime duty.
200 kW standby · Natural Gas / LPG · Liquid-cooled
175 kW prime-rated natural gas / LP generator from Blue Star Power Systems. PSI 11.1L inline-six, DSE DCP7310 controller, 208-600V, continuous prime duty.
265 kW standby · Natural Gas / LPG · Liquid-cooled
265 kW natural gas / LP standby generator from Blue Star Power Systems. PSI 14.6L turbocharged V8, DSE DCP7310 controller, structural steel base, 208-600V.
265 kW standby · Natural Gas / LPG · Liquid-cooled
250 kW prime-rated natural gas / LP generator from Blue Star Power Systems. PSI 14.6L V8, DSE DCP7310 controller, structural steel base, continuous prime duty.
300 kW standby · Natural Gas / LPG · Liquid-cooled
300 kW natural gas / LP standby generator from Blue Star Power Systems. PSI 14.6L turbocharged V8, DSE DCP7310 controller, structural steel base, three-phase 208-600V.
300 kW standby · Natural Gas / LPG · Liquid-cooled
260 kW prime-rated natural gas / LP generator from Blue Star Power Systems. PSI 14.6L V8, DSE DCP7310 controller, structural steel base, three-phase 208-600V.
350 kW natural gas standby generator from Blue Star Power Systems. PSI 14.6LHO high-output V8, DSE DCP7310 controller, structural steel base, three-phase 208-600V. Natural gas only — no LP rating.
400 kW standby · Natural Gas / LPG · Liquid-cooled
400 kW natural gas / LP standby generator from Blue Star Power Systems. PSI 21.9L turbocharged V12, DSE DCP7310 controller, structural steel base, three-phase 208-600V.
400 kW standby · Natural Gas / LPG · Liquid-cooled
375 kW prime-rated natural gas / LP generator from Blue Star Power Systems. PSI 21.9L V12, DSE DCP7310 controller, structural steel base, three-phase 208-600V.
425 kW standby · Natural Gas / LPG · Liquid-cooled
425 kW natural gas / LP standby generator from Blue Star Power Systems. PSI 21.9L V12 turbocharged-aftercooled, DSE DCP7310 controller, three-phase 208-600V.
450 kW standby · Natural Gas / LPG · Liquid-cooled
450 kW natural gas / LP standby generator from Blue Star Power Systems. PSI 21.9L V12 turbocharged-aftercooled, DSE DCP7310 controller, three-phase 208-600V.
500 kW standby · Natural Gas / LPG · Liquid-cooled
500 kW natural gas / LP standby generator from Blue Star Power Systems. PSI 32L V12 turbocharged-aftercooled, DSE DCP7310 controller, three-phase 208-600V.
500 kW standby · Natural Gas / LPG · Liquid-cooled
450 kW prime-rated natural gas / LP generator from Blue Star Power Systems. PSI 32L V12 turbocharged-aftercooled, DSE DCP7310 controller, three-phase 208-600V.
500 kW natural-gas-only standby generator from Blue Star Power Systems. PSI 21.9LHO high-output V12 turbocharged-aftercooled, DSE DCP7310 controller, three-phase 208-600V. LP not available.
600 kW standby · Natural Gas / LPG · Liquid-cooled
600 kW natural gas / LP standby generator from Blue Star Power Systems. PSI 32L V12 turbocharged-aftercooled, DSE DCP7310 controller, three-phase 208-600V.
600 kW standby · Natural Gas / LPG · Liquid-cooled
540 kW prime-rated natural gas / LP generator from Blue Star Power Systems. PSI 32L V12 turbocharged-aftercooled, DSE DCP7310 controller, three-phase 208-600V.
650 kW standby · Natural Gas / LPG · Liquid-cooled
650 kW natural gas / LP standby generator from Blue Star Power Systems. PSI 32L V12 turbocharged-aftercooled, DSE DCP7310 controller, three-phase 208-600V.
650 kW standby · Natural Gas / LPG · Liquid-cooled
550 kW prime-rated natural gas / LP generator from Blue Star Power Systems. PSI 32L V12 turbocharged-aftercooled, DSE DCP7310 controller, three-phase 208-600V.
800 kW standby · Natural Gas / LPG · Liquid-cooled
800 kW natural gas / LP standby generator from Blue Star Power Systems. PSI 40L V12 turbocharged-aftercooled, DSE DCP7310 controller, three-phase 208-4160V.
800 kW standby · Natural Gas / LPG · Liquid-cooled
660 kW prime-rated natural gas / LP generator from Blue Star Power Systems. PSI 40L V12 turbocharged-aftercooled, DSE DCP7310 controller, three-phase 208-4160V.
150 kW standby · Natural Gas / LPG · Liquid-cooled
150 kW natural gas / LP standby generator from Blue Star Power Systems. PSI 8.8LTCAC turbocharged-aftercooled V8, DSE DCP7310 controller, single- and three-phase 120-600V.
35 kW prime / 40 kW standby natural gas / LP generator from Blue Star Power Systems. PSI 4.3L six-cylinder V6 engine with catalyst/silencer, Stamford UCI224C alternator, DSE DCP7310 controller, 208-600V output.
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
C
Caterpillar
Cat G3512
750 kW standby · Natural Gas · Liquid-cooled
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
C
Caterpillar
Cat G3516H
2.0 MW standby · Natural Gas · Liquid-cooled
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.
3-phasecontinuous-dutycogeneration
C
Caterpillar
Cat G3520E
2.0 MW standby · Natural Gas · Liquid-cooled
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
C
Caterpillar
Cat G3520H
2.5 MW standby · Natural Gas · Liquid-cooled
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
C
Caterpillar
Caterpillar G3406
300 kW standby · Natural Gas · Liquid-cooled
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.
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.
175 kW natural gas standby generator with GTA 8.3G engine. 175 kW / 219 kVA standby, PowerCommand 1.1 controls, 2202 CFH full-load, dimensions 115 x 40 x 59 in. ISO 9001:2015 manufactured.
3-phasecommercial-standbyindustrial-standby
C
Cummins
Cummins C200 N6
200 kW standby · Natural Gas / LPG · Liquid-cooled
200 kW natural gas/propane commercial standby generator. Cummins' flagship gaseous unit with QSJ8.9G engine and PowerCommand 2.3 controller.
300 kW natural gas standby generator with GTA 855E engine. 300 kW / 375 kVA standby, PowerCommand 3.3 controls, 4098 CFH full-load, open set dimensions 147 x 69 x 77 in. UL 2200, EPA certified.
3-phasecommercial-standbyindustrial-standby
C
Cummins
Cummins C500 N6
500 kW standby · Natural Gas · Liquid-cooled
500 kW natural gas standby generator with GTA 28E V12 engine. 500 kW / 625 kVA standby, PowerCommand 3.3 controls, 6994 CFH full-load, open set dimensions 166 x 82 x 98 in. UL 2200, EPA certified.
60 kW standby natural gas generator with Generac 4.5L turbocharged spark-ignited engine. EPA certified stationary emergency. Single and three-phase configurations.
3-phasecommercial-standbyindustrial-standby
G
Generac
Generac SG070
70 kW standby · Natural Gas · Liquid-cooled
70 kW standby natural gas generator with Generac 4.5L turbocharged spark-ignited engine. EPA certified stationary emergency and demand response. Single and three-phase.
3-phasecommercial-standbyindustrial-standby
G
Generac
Generac SG080
80 kW standby · Natural Gas · Liquid-cooled
80 kW standby natural gas generator with Generac 9.0L V8 naturally aspirated spark-ignited engine. EPA certified stationary emergency and demand response. Single and three-phase.
3-phasecommercial-standbyindustrial-standby
G
Generac
Generac SG100
100 kW standby · Natural Gas / LPG · Liquid-cooled
100 kW industrial gaseous standby generator. Generac's commercial natural gas/LP platform competing with Kohler KG100 and Cummins C100 N6.
540 kW prime-rated natural gas generator. PSI 31.8L V12 turbocharged, Stamford HCI534 alternator, DSE 7420. Continuous duty, 3-phase only. Gillette's largest prime gas unit.
1,050 kW natural gas stationary standby generator. PSI 52.3L V16 turbocharged engine, Stamford AVK alternator, DSE 7420 MKII. Natural gas only. Made in USA.
200 kW natural gas stationary standby generator. Made-in-USA commercial unit with PSI 8.8L high-output turbocharged V8, Stamford alternator, and DSE 7420 MKII controller. NG only.
650 kW natural gas stationary standby generator. PSI 31.8L V12 turbocharged engine, Stamford HCI634 alternator, DSE 7420 MKII. Natural gas only. Made in USA.
25 kW gaseous-fueled standby generator with Brushless Wound-Field alternator and PowerBoost excitation. Sized for residential and light commercial backup on natural gas or propane.
Single-phaseresidentialcommercial-small
Kohler
Kohler 300REZXC
300 kW standby · Natural Gas · Liquid-cooled
300 kW natural gas industrial standby generator. Enclosed gaseous standby with Doosan engine for large commercial and institutional applications.
300 kW gaseous-fueled commercial standby generator. Kohler/Rehlko 300REZXC large industrial gaseous unit for major facilities, paralleling applications, and campus power. Note: the 300 kW Kohler gas genset is sold as the 300REZXC, not as 'KG300'.
30 kW gaseous-fueled standby generator with Brushless Wound-Field alternator and PowerBoost excitation. Mid-range CCL series unit for residential and light commercial backup.
30-36 kW gaseous-fueled standby generator with Brushless Wound-Field alternator and PowerBoost excitation. Largest CCL series unit for residential and light commercial backup.
400 kW gaseous-fueled commercial standby generator. Kohler/Rehlko 400REZXB — the flagship of Kohler's industrial gaseous lineup for large facilities and paralleling arrays. Note: the 400 kW Kohler gas genset is sold as the 400REZXB, not as 'KG400'.
490-500 kW natural gas industrial standby generator with Siemens engine and Brushless Permanent-Magnet Pilot Exciter alternator. Large commercial and industrial backup power.
100 kW gaseous-fueled commercial standby generator. Upper-mid-range industrial gaseous unit for larger commercial facilities on natural gas or propane.
41-50 kW gaseous-fueled commercial standby generator with Brushless Rare-Earth Permanent-Magnet alternator. Industrial gaseous unit for commercial backup on natural gas or propane.
53 kW gaseous-fueled commercial standby generator with Brushless Rare-Earth Permanent-Magnet alternator. Industrial gaseous unit for commercial backup on natural gas or propane.
60 kW gaseous-fueled commercial standby generator with Kohler 6.2L engine, EPA Subpart JJJJ certified for stationary emergency. Specs, service intervals, common failure modes, and compatible transfer switches.
