Overview#
The Hipower HNI-300 is a 300 kW standby natural gas generator powered by the PSI 13LTHO — the high-output variant of PSI's 13-liter turbocharged spark-ignited engine. At 300 kW, this unit covers large commercial buildings, data centers, hospitals, and industrial facilities where natural gas supply from the utility is established and diesel standby creates operational or regulatory complexity.
CARB certification across the full HNI range (30–1000 kW) makes the HNI-300 one of the few non-Big-4 options at this power class that qualifies for California permit-by-rule — removing a significant approval step for California project teams.
Engine Platform#
The PSI 13LTHO is a high-output version of PSI's 13-liter turbocharged platform, running at 1800 RPM in stationary duty. PSI has supplied engines to multiple generator OEMs across North American commercial and industrial standby markets. The spark-ignited architecture eliminates diesel-specific aftertreatment: no DPF regeneration cycles, no SCR, no DEF. Service centers on spark plugs, oil changes, and gas system inspection.
At 300 kW, gas supply line sizing and meter capacity are critical infrastructure considerations. A mechanical engineer must confirm utility delivery against the generator's BTU demand at full load before finalizing the installation.
CARB-Certified for California#
The HNI series holds CARB certification from 30 kW through 1000 kW. The HNI-300's certification qualifies it for California permit-by-rule, bypassing the source test and air district variance process that applies to non-certified engines. In this power class — 250–350 kW — California-compliant natural gas options outside the Big 4 are limited, making the HNI-300 a competitive specification.
Service and Maintenance#
- Oil and filter: 1000 hours or 12 months
- Spark plugs: 1000 hours
- Air filter: 500 hours
- Gas line and regulator: Annual inspection
- Ignition system: Annual inspection
- Major overhaul: 30,000 hours
Our Service Experience#
OnPoint Generators services natural gas standby equipment throughout Northern California. At 300 kW, the HNI-300 is common in large commercial and light-industrial applications where facilities want to consolidate their energy infrastructure on natural gas and avoid diesel storage compliance. Our teams are trained on PSI spark-ignited platforms in this displacement class.
