Caterpillar · Cat D-Series GC (Diesel)

Cat D1100 GC

1100 kW standby / 1000 kW prime · Diesel · Liquid-cooled

1100 kW diesel standby generator from Cat's GC value-engineered line. C32 V-12 engine with simplified controls for mission-critical standby.

Standby power
1100 kW / 1000 kW prime
Voltage options
277/480V, 346/600V, 4160V
Frequency / Phase
60 Hz · 3-phase
Engine
Caterpillar C32 · 32.1L
EPA / Emissions
Tier 2
standbyData CentersHealthcareCommercialparalleling-array
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Overview#

The Cat D1100 GC is an 1,100-kilowatt diesel standby generator providing above-megawatt capacity from Cat's C32 V-12 in the GC value-engineered line. It serves data centers and hospitals that need additional headroom beyond the standard 1 MW per unit.

Above megawatt, same platform#

The D1100 GC extracts more from the C32 engine than the D1000 GC — 1,100 kW standby with a full 1,000 kW prime rating. This additional 10% provides meaningful margin for facilities with growing load profiles or those that need 1 MW prime capacity.

Our service perspective#

At 1,100 kW, the C32 runs at a higher output than the D1000 GC, making preventive maintenance discipline critical. Dual turbocharger monitoring, balanced fuel injection, and Cat's S.O.S analysis program are essential at this rating.

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Estimate runtime for the Cat D1100 GC

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

3.4 hours(0.1 days)

Fuel consumption ≈ 59.40 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.

Frequently Asked Questions

What is the Cat D1100 GC?
The D1100 GC delivers 1.1 MW from Cat's C32 V-12 engine in the GC value-engineered package. It provides above-megawatt capacity for data centers and hospitals that need additional headroom beyond 1 MW per unit.
When should I choose the D1100 GC over the D1000 GC?
Both use the same C32 engine. Choose the D1100 GC when your load calculation exceeds 900 kW or when you want 1 MW prime rating with standby headroom. The 10% higher rating provides meaningful margin for facilities with growing load profiles.

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