550 kW standby / 500 kW prime Tier 4 Final / EU Stage 5 mobile trailer diesel generator built by Blue Star Power Systems. Volvo Penta TWD1682GE six-cylinder engine, 572RSL6429 alternator, DSE DCP7310 controller, 550-gallon integrated fuel tank.
The Blue Star VD550-04FT4MP is a 550-kilowatt standby / 500-kilowatt prime EPA Tier 4 Final / EU Stage 5 mobile trailer diesel generator powered by the Volvo Penta TWD1682GE — a 16.12-liter, six-cylinder turbocharged and charge-air-cooled engine. It is the second-largest model in Blue Star's Tier 4 Final mobile lineup and the first with a significant split between standby and prime ratings (550/500 kWe).
Blue Star Power Systems mounts the TWD1682GE on an aluminum road trailer with a 550-gallon integral fuel tank and 52.8-gallon DEF tank, paired with a Leroy-Somer 572RSL6429 alternator and DSE DCP7310 controller. At 24,750 lbs, the VD550-04FT4MP requires a commercial tractor for transport. The 334.5 × 99.5 × 144 in trailer is the largest platform in the Tier 4 Final mobile VD series before the VD600.
Unlike most smaller VD mobile models where standby and prime ratings are equal, the VD550-04FT4MP has a 50 kWe spread: 550 kWe standby (rated for emergency use without continuous duty limits) vs 500 kWe prime (rated for continuous variable power service). This is an important distinction for applications where continuous prime power use is anticipated — size the system to the prime rating (500 kWe) for continuous duty applications. Do not use the 550 kWe standby rating to size a continuous prime power application.
The VD550-04FT4MP and VD600-04FT4MP share the same 334.5 × 99.5 in trailer footprint and 550-gallon fuel tank. The 52.8-gallon DEF tank represents a major step up from the 18.5 gallons used in all smaller models. At this output level, DEF consumption is substantial — plan DEF logistics the same way fuel logistics are planned.
The TWD1682GE is a large, complex engine requiring the full Volvo Penta TWD service schedule — oil, coolant, air filtration, fuel injection system, and aftertreatment (T4F/Stage 5) at specified intervals. The 52.8-gallon DEF tank at 38.3 gph diesel consumption means DEF must be treated as a primary consumable on extended deployments. At 24,750 lbs and 334.5 in length, site access logistics require advance planning — confirm road weight limits and site entry dimensions before deployment. Annual full-load testing (38.3 gph) is mandatory for maintaining aftertreatment health. The 72-inch trailer height (144 in total unit height) may require oversize permits in some jurisdictions.
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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
Estimated runtime
18.6 hours(0.8 days)
Fuel consumption ≈ 29.55 GPH at 75% load. Estimate based on industry-typical 1800 RPM standby curves (≈0.07 GPH/kW at full load). Actual consumption varies by engine, ambient temperature, fuel quality, and tuning.
Service intervals
Manufacturer-recommended intervals for the Blue Star VD550-04FT4MP under standby duty. Field intervals may differ based on load profile, ambient conditions, and fuel quality.
Oil & filter
Every 500 hours or 12 months
Coolant change
Every 6000 hours
Air filter
Every 1000 hours
Fuel filter
Every 500 hours
Major overhaul
≈ 20,000 hours
Load bank test
Every 12 months
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
DEF system (SCR catalyst)
Derate warning, NOx fault, DEF quality alert
4,380+
moderate
Turbocharger(s)
Major power loss, heavy exhaust smoke
12,000+
severe
Fuel quality / degradation
Injector fouling, hard starting
4,380+
moderate
Battery bank (24V)
Failed start, slow cranking
8,760+
minor
Frequently Asked Questions
What engine does the VD550-04FT4MP use?
The Volvo Penta TWD1682GE — a 16.12-liter, six-cylinder turbocharged and charge-air-cooled diesel. The 'TWD' designation identifies Volvo Penta's turbocharged, water-cooled charge air cooler configuration used in this output class. The TWD1682GE produces 550 kWe standby and 500 kWe prime — a split standby/prime rating that is notable in the mobile lineup; most smaller VD mobile models have equal standby and prime ratings. EPA Tier 4 Final and EU Stage 5 dual certification applies. The 52.8-gallon DEF tank is the largest in the VD mobile series, more than double the 18.5-gallon tank used in VD100 through VD300. Rated power is available to 4,921 ft (1,500 m) at 122°F (50°C).
What controller does the VD550-04FT4MP use?
The DSE DCP7310 Digital Control Panel, with CAN Bus J1939 engine communication, digital metering, RS-485 interface, 8 programmable contact inputs, 10 contact outputs, and NFPA 110 Level 1 compatibility. The panel is cULus Listed and CE Approved with IP 65 ingress protection (with supplied gasket). A 24V battery system and battery charger are included. The 572RSL6429 alternator represents a different frame series from the UCI274/S4L1D/HCI534 alternators used in smaller VD mobile models.
What is the difference between the VD550-04FT4MP 550 kWe standby and 500 kWe prime ratings?
The VD550-04FT4MP carries separate standby and prime ratings: 550 kWe standby (emergency use, no continuous power duty limit) and 500 kWe prime (continuous variable power, unlimited hours). The 50 kWe reduction at prime reflects the engine's continuous duty thermal and mechanical limits vs the short-duration overload capacity used for standby ratings. Most smaller VD mobile models have equal standby and prime ratings; the TWD1682GE platform is one of the few in the mobile lineup where the two diverge. Specify the appropriate rating for the application.
What are the fuel and DEF logistics for the VD550-04FT4MP?
The 550-gallon integral fuel tank at full standby load (38.3 gph) provides approximately 14.4 hours of runtime. At 75% load (29.1 gph), runtime extends to approximately 18.9 hours. The 52.8-gallon DEF tank typically supports 12–16 hours at full load before refill. For 24-hour deployments, plan for one refueling cycle and one DEF refill. Combustion air draw is 1,667 CFM; ventilation air requirement is 27,122 CFM; heat rejected to coolant is 713,160 BTU/hr; radiated heat to ambient is 688,500 BTU/hr.
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