Overview#
The Hipower HJW-355 is a 355 kW diesel standby generator from the HJW Industrial series, built at Hipower Systems' Olathe, Kansas facility. It is powered by a John Deere 6090HF484 family engine — a 9.0-liter six-cylinder turbocharged diesel, the same platform used across the upper HJW range — paired with a Stamford HCI 444 series alternator. The set is EPA Tier 3 certified and carries UL 2200 and CSA listings.
The HJW-355 is a three-phase generator set available in 277/480V, 120/208V, and 347/600V configurations. At 355 kW, it is suited for large industrial and critical facility standby applications: hospitals, data centers, large commercial campuses, water treatment facilities, and heavy industrial operations requiring high-ampacity emergency power at 480V.
John Deere Engine Platform#
The HJW-355 uses a high-output variant of the John Deere 6090HF484 engine family — a 9.0-liter (549 cubic inch) inline six-cylinder turbocharged diesel that anchors the top end of the HJW product range. Across the HJW-225, HJW-275, HJW-305, HJW-355, and HJW-410, the same 6090 engine block is used with progressively calibrated turbocharger and fuel system settings to deliver higher output at each model step.
The 6090 engine's broad deployment in industrial and agricultural equipment ensures strong parts availability and service coverage throughout California and the western United States. John Deere's dealer network provides authorized support, and independent diesel specialists can service the engine for routine maintenance.
Hipower Manufacturing#
Hipower Systems manufactures the HJW-355 in Olathe, Kansas with full factory load testing and test certificates issued for each unit. Heavy-duty steel skid construction with anti-vibration isolators, optional sound-attenuated enclosures, and compliance with NFPA 110, NFPA 99, UL 2200, CSA, and ISO 8528-5 standards characterize the build quality of the HJW series.
Service and Maintenance#
The 9.0-liter John Deere 6090 engine requires 250-hour or annual oil and filter changes. At 355 kW, fuel consumption is substantial — precise fuel management and annual tank polishing are important for preventing injection system contamination during extended standby periods. Stamford HCI 444 alternator maintenance includes connection inspection and insulation resistance testing every 2-3 years. Starting battery systems should be float-charged continuously and tested annually.
Our Service Experience#
OnPoint Generators services large generator sets in the Bay Area and Northern California including units in the HJW-355 output class. Critical facilities requiring 355 kW standby — hospitals, data centers, industrial campuses — are well within our service capabilities. The John Deere 6090 engine has strong California dealer support for parts and factory-level diagnostics. Contact OnPoint for commissioning, load bank testing, and ongoing maintenance programs.
