Gillette · T4D Series (Tier 4 Final Prime Diesel)

Gillette T4D-1500

150 kW standby · Diesel · Liquid-cooled

150 kW Tier 4 Final / Stage 5 diesel generator with Volvo Penta TAD881VE 7.7L engine. SCR aftertreatment, DEF system, Basler DGC-2020 controller. Made in USA.

Gillette Gillette T4D-1500 generator — specifications and details
Standby power
150 kW / 150 kW prime
Voltage options
120/240V, 120/208V, 277/480V, 346/600V
Frequency / Phase
60 Hz · 1/3-phase
Engine
Volvo Penta TAD881VE · 7.7L
EPA / Emissions
Tier 4 Final
Alternator
Stamford UCI274G-311
CommercialHealthcareprime-powerGovernmentrental
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Overview#

The Gillette T4D-1500 is a 150-kilowatt Tier 4 Final / EU Stage V dual-certified diesel generator on Volvo Penta's TAD881VE — a 7.7L turbocharged inline-6 with SCR aftertreatment. Rated at 150 kW for both standby and prime duty. Stamford UCI274G alternator, Basler DGC-2020 controller.

The TAD881VE — Tier 4 Final version of the 7.7L platform#

The TAD881VE is the emissions-compliant evolution of the TAD852GE (used in the SPVD-2500 Tier III). Key differences: SCR catalyst system, DEF injection, onboard emissions diagnostics, and EU Stage V dual certification. The 7.7L inline-6 architecture is the same — 4.33" bore × 5.31" stroke, 17.2:1 compression.

Our service experience#

The Volvo Tier 4 Final engines add DEF system management to standard diesel service protocols. We monitor DEF quality, tank level, and SCR catalyst performance at each service visit. The Basler DGC-2020 provides DEF-related fault codes for proactive maintenance.

Engineering specifications

Physical

Length
172 in
Width
52 in
Height
65 in
Wet weight
4,362 lb

Acoustic

Sound @ 7m, full load
79 dBA
Enclosure
Sound-attenuated

Fuel system & runtime

Fuel use @ full load
11.5 GPH

Photos

Gillette T4D-1500 — product photo

Documents & downloads

Spec sheets & manuals

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Estimate runtime for the Gillette T4D-1500

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

22.5 hours(0.9 days)

Fuel consumption ≈ 8.87 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 Gillette T4D-1500 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.

ComponentSymptomTypical hoursSeverity
DEF system (SCR catalyst)Derate warning, NOx fault4,380+moderate
Fuel qualityInjector fouling, hard starting4,380+moderate
BatteryFailed to start, slow crank8,760+minor

Frequently Asked Questions

Is the TAD881VE the same platform as the SPVD-2500's TAD852GE?
Related but different. The TAD881VE (T4D-1500) is the Tier 4 Final variant of the 7.7L Volvo engine family with SCR aftertreatment. The TAD852GE (SPVD-2500) is the Tier III variant at 250 kW standby without aftertreatment. Same displacement class, different emissions technology and kW rating.
What DEF consumption at 150 kW?
Approximately 6% of diesel consumption. At 11.5 gal/hr diesel, expect ~0.7 gal/hr DEF at full load.
Are standby and prime ratings identical?
Yes — 150 kW for both standby and prime duty. The T4D series is designed for dual-duty capability.

Compatible equipment

Engine

Transfer switches

More in the T4D Series (Tier 4 Final Prime Diesel)

100–600 kW Tier 4 Final diesel with equal standby and prime ratings — Volvo VE-series with SCR.

View all 7models in this series →

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