Overview#

The PSI 21.9L is a 21.9-liter, 12-cylinder v-12 natural gas / lpg engine used in commercial and industrial generator applications in the 375-450 kW class. Turbocharged Intercooled for reliable power density across standby and prime-rated duty cycles.

This engine powers generators from Blue Star Power Systems, Hipower Systems, making it one of the more widely deployed prime movers in its power class for the commercial standby market.

Generators using this engine#

Blue Star NG400-01 (400 kW)
Blue Star NG400-01P (400 kW)
Hipower HNG-400 (400 kW)
Blue Star NG425-01 (425 kW)
Blue Star NG450-01 (450 kW)
Hipower HNI-450 (450 kW)

Found in these gensets

Generator models that ship with or are commonly paired with the PSI 21.9L.

Hipower Systems

Hipower HNG-400

CARB-certified large stationary natural gas standby from Hipower's HNG series — utility-supplied fuel, no on-site diesel storage, broad voltage options.

400 kW standby · Natural Gas / LPG · Liquid-cooled

California industrial and large commercial buildings at 400 kW with natural gas service where CARB certification is required.

400 kW stationary natural gas generator with PSI natural gas engine. CARB certified for California standby. Largest model in Hipower's HNG series.

EPA Stationary Spark Ignition3-phasecommercial-standbyindustrial-standby

Hipower Systems

Hipower HNI-450

Broadest CARB-certified natural gas lineup from a Tier 2 manufacturer — 30 to 1000 kW with PSI and Origin engines.

450 kW standby · Natural Gas / LPG · Liquid-cooled

California large industrial and data center natural gas standby where CARB certification is mandatory and Big 4 pricing is not justified.

450 kW standby natural gas generator with PSI 21.9L V12 engine. CARB certified for California large-facility natural gas standby.

EPA Stationary Spark Ignition3-phaseindustrialdata-center

Overview#

Generators using this engine#

Found in these gensets

Hipower HNG-400

Hipower HNI-450

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