Blue Star Power Systems · Volvo Penta Diesel Standby
Blue Star VD250-04FT4
250 kW standby · Diesel · Liquid-cooled
250 kW Tier 4 Final diesel standby/prime generator from Blue Star Power Systems. Volvo Penta TAD1381VE 12.8L inline-six with SCR/DPF/DOC, DSE DCP7310 controller, 208-600V.
The Blue Star VD250-04FT4 is a 250-kilowatt EPA Tier 4 Final / EU Stage 5 diesel standby/prime generator built around the Volvo Penta TAD1381VE — a 12.8-liter inline-six producing 388 HP at 1800 RPM. This is a current-production active model that replaces the legacy VD250-03 at this power class.
The TAD1381VE is the Tier 4 Final evolution of the proven 12.8L block (bore 5.16 in, stroke 6.22 in) that powered the Tier 3 TAD1351-1353GE engines, now fitted with SCR/DPF/DOC triple aftertreatment and electronic engine management for the most stringent emissions compliance.
VD250-03 (250 kW, Volvo TAD1351GE 12.8L I-6, Tier 3) — the Tier 3 equivalent using the same displacement block, for jurisdictions where Tier 3 is still permitted.
The TAD1381VE shares the same 12.8L block architecture as the Tier 3 TAD1351-1353GE engines, so technicians familiar with the Tier 3 platform will find the mechanical service procedures largely similar. The key additions for Tier 4 Final are the SCR/DPF/DOC aftertreatment system requiring periodic DPF ash cleaning, regular DEF replenishment (18.5-gallon tank, 5.10% consumption rate), and monitoring via the DSE DCP7310 controller. The unit shares the same 120 x 66 x 91 in footprint as the VD300-04FT4, simplifying site planning when sizing between 250 and 300 kW.#
Lock the enclosure, fuel system, transfer switch, and add-ons — we'll confirm pricing, availability, and lead time within one business day. Prefer a free-form quote? That option is still here.
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
15.0 hours(0.6 days)
Fuel consumption ≈ 13.35 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 VD250-04FT4 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
Fuel quality
Injector fouling, hard starting
4,380+
moderate
Battery
Failed to start, slow crank
8,760+
minor
Frequently Asked Questions
What engine is in the VD250-04FT4?
The Volvo Penta TAD1381VE — a 12.8-liter (780 cu in) inline-six turbocharged-aftercooled diesel rated 388 HP (285 kWm) at 1800 RPM with a 16.8:1 compression ratio. The TAD1381VE is the Tier 4 Final version of the 12.8L block (bore 5.16 in, stroke 6.22 in) that powered the Tier 3 TAD1351-1353GE engines. EPA Tier 4 Final and EU Stage 5 certified with SCR/DPF/DOC triple aftertreatment.
Does the VD250-04FT4 require DEF?
Yes. DEF consumption is approximately 5.10% of fuel consumption. The 18.5-gallon DEF tank provides extended runtime between refills. At full load (17.3 gph fuel), DEF consumption is approximately 0.88 gph.
How does the VD250-04FT4 compare to the Tier 3 VD250-03?
The Tier 3 VD250-03 uses a 12.8L TAD1351GE engine without aftertreatment. The Tier 4 Final VD250-04FT4 uses the TAD1381VE — the same 12.8L block (bore 5.16, stroke 6.22) upgraded with SCR/DPF/DOC aftertreatment for Tier 4 Final / EU Stage 5 compliance. The T4F model requires DEF and is heavier (8,725 lbs vs the Tier 3 equivalent), but meets the most stringent emissions standards required in California and CARB-aligned jurisdictions.
What is the altitude rating for the VD250-04FT4?
Rated power is available up to 4,921 ft (1,500 m). Sites above this elevation require deration calculations. The 12.8L TAD1381VE platform maintains consistent performance across the standard altitude range for most Northern California installations.
Open Basler controller + Volvo Penta engine + Stamford alternator — trailer-mounted, no proprietary lock-in. Serviceable by any qualified tech.
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