The Hipower HRNG-85 is a 66 kW trailer-mounted natural gas generator — the entry-level model in Hipower's HRNG mobile natural gas series (85–1250 kVA). Unlike conventional diesel towable generators, the HRNG-85 connects to the deployment site's permanent natural gas supply rather than carrying an on-board fuel tank.
This fundamental difference defines the HRNG's use case: it is a mobile platform for sites with gas service, not a fuel-independent portable generator. Typical applications include construction sites where the building under construction has active gas service, commercial buildings requiring temporary bypass power during electrical switchgear work, events at venues with gas infrastructure, and data centers needing outage coverage from a gas-fueled source.
CARB certification enables the HRNG-85 for California temporary and emergency standby applications without source test or air district variance. The 66 kW output covers small-to-mid commercial loads: lighting, HVAC zones, IT infrastructure, and food service equipment.
The HRNG-85 is powered by a PSI natural gas engine running at 1800 RPM. PSI supplies spark-ignited engines to multiple standby generator manufacturers and maintains a broad parts and service network across North America. The specific PSI model for this output class is pending verification from OEM documentation. The spark-ignited platform requires no diesel particulate filter, no diesel exhaust fluid, and no diesel fuel management.
The HRNG series is built on road-legal trailer frames with proper lighting and safety equipment. The HRNG-85's compact size allows deployment in locations where larger trailer generators cannot fit. Connection to the site gas supply is via flexible connector to the unit's gas train.
Hipower's HRNG series holds CARB certification for California natural gas temporary standby. The HRNG-85 qualifies for California permit-by-rule in temporary standby applications.
OnPoint Generators provides support for Hipower HRNG natural gas trailer generators in Northern California. Gas-fueled towable generators are appropriate for construction and event applications where gas service is available and diesel fuel logistics are undesirable.
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Adjust load percent and tank size to estimate runtime. Pre-filled with this model's spec where available.
Estimate runtime on this tank
Fuel demand at 75% load
693,000 BTU/hr≈ 693.0 cf/min @ 1,000 BTU/cf
On utility natural gas the runtime is generally unlimited provided the supply line and meter can deliver this BTU/hr at the engine's required inlet pressure (typically 5–14" WC residential, up to 5 psi commercial). Confirm against the OEM's published fuel-pressure spec.
Service intervals
Manufacturer-recommended intervals for the Hipower HRNG-85 under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.
Oil & filter
Every 1000 hours or 12 months
Air filter
Every 500 hours
Spark plugs
Every 1000 hours
Major overhaul
≈ 30,000 hours
Common failure modes
What we've seen fail on this platform. Use as a service-planning reference, not a diagnostic — actual failure modes depend heavily on duty cycle and maintenance history.
Component
Symptom
Typical hours
Severity
Spark plugs
Erosion from natural gas combustion — replace at 1000-hour intervals
1,000+
minor
Gas pressure regulator
Inlet pressure drift — test regulator at each service and before deployment
4,380+
minor
Trailer road lights
Wiring damage from road vibration — inspect electrical connections at each deployment
2,000+
minor
Frequently Asked Questions
What is the HRNG series?
The HRNG is Hipower's trailer-mounted mobile natural gas generator series, covering 85–1250 kVA. Unlike diesel trailer generators, HRNG units connect to a permanent natural gas supply at the deployment site — they do not carry on-board fuel. All units use PSI natural gas engines and hold CARB certification.
What type of gas connection does the HRNG-85 require?
The HRNG-85 requires connection to a permanent natural gas supply at the deployment site — a utility gas service, building gas meter, or site gas distribution line. It cannot be used where no permanent gas service exists.
Is the HRNG-85 CARB certified?
Yes. Hipower's HRNG series holds CARB certification for California temporary and emergency standby applications.
What applications use a towable natural gas generator?
Construction sites with gas service hookups, venues hosting events with gas infrastructure, data centers needing temporary outage coverage, and hospitals or commercial buildings requiring bypass power during electrical maintenance.
How does the HRNG differ from a diesel towable generator?
The HRNG connects to the site's permanent gas supply — no on-board diesel tank, no fuel delivery scheduling, and no spill risk. The trade-off: the deployment site must have a permanent gas service connection sized for the generator's BTU demand.
Who provides HRNG rental and service in Northern California?
Contact OnPoint Generators for information on HRNG rental availability and service in Northern California.
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