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Caterpillar ESP 550 Specs (Power | Consumption)

Written by Ernie Lo in Specs Last Updated August 18, 2026

The Caterpillar ESP 550 generator is listed with standby output of 550 kW, 60 Hz operation, 480 V output, and Three phase.

Caterpillar Generator Specifications

Generator • 60 Hz • Three phase

Standby power: 550 kWVoltage options: 480 VDry weight: 10,470 lb (4,749 kg)

Key specifications

550 kW Standby power
480 V Voltage options
Three phase Phase
10,470 lb (4,749 kg) Dry weight
60 Hz Frequency

Useful generator charts

Charts are shown only when this model has enough usable source data.

Fuel consumption by load
How fuel use changes as generator load increases.
No load

20.6 gal/hr

50% load

10.2 gal/hr

75% load

19.9 gal/hr

100% load

38.4 gal/hr

Power-to-weight
Standby output per 1,000 lb of dry weight compared with a fixed industry reference for this output class.
This model

52.5 kW

Typical reference

47 kW

Typical for this output class
Model spec snapshot
Representative numeric specifications from this generator.
550 kWStandby
10,469.75 lbWeight

How the Caterpillar ESP 550 compares

Low, Typical and High are fixed generator-industry reference bands set by standby-output class. They do not change based on the models contained in this CSV.

Standby power
550 kW
Low range
Typical: 700 kW
Dry weight
10,470 lb
Low range
Typical: 14,991 lb
Oil capacity
15.85 gal
Low range
Typical: 23.78 gal
Standby power550 kW · Low
Low 400 kWTypical 700 kWHigh 1,000 kW

Falls toward the low end of the fixed industry reference range for generators in this standby-output class.

Dry weight10,470 lb · Low
Low 7,011 lbTypical 14,991 lbHigh 27,999 lb

Falls toward the low end of the fixed industry reference range for generators in this standby-output class.

Oil capacity15.85 gal · Low
Low 10.57 galTypical 23.78 galHigh 59.44 gal

Falls toward the low end of the fixed industry reference range for generators in this standby-output class.

This model Typical industry reference

Generator information

Manufacturer Caterpillar
Model ESP 550
Generator type Generator
Frequency 60 Hz

Electrical output

Standby power 550 kW
Standby kVA 688.0
Voltage options 480 V
Phase Three phase

Engine, cooling and controls

Engine model Caterpillar C15 ATAAC
Engine displacement 928 cu in (15.2 L)
Aspiration / cooling ATAAC
Rated engine speed 1800 rpm
Engine oil capacity 15.9 gal (60 L)
Engine coolant capacity 12.6 gal (47.8 L)
Oil capacity 15.9 gal (60 L)
Coolant capacity 5.49 gal (20.8 L)
Controller EMCP 4
Alternator Caterpillar LC6114G

Physical specifications

Dry weight 10, 470 lb (4, 749 kg)
Dimensions (L × W × H) 148.6 × 43.7 × 82.3 in (3775 × 1110 × 2091 mm)

Fuel consumption

Standby 20.6 gal/h (75.0 L/h) @ 50%; 10.2 gal/h (38.4 L/h) @ 75%; 19.9 gal/h (75.5 L/h) @ 100%; 38.4 gal/h (145.5 L/h)

Maintenance and service parts

Engine oil Interval: 500 hr; Capacity: 74.0 L
Oil filter Part number: 2P4005; Interval: 1250 hr
Fuel filter Part number: 33674; Interval: 1250 hr
Air filter Part number: 46822; Interval: 1250 hr
Coolant Interval: 1250 hr; Capacity: 57.8 L
Belt Interval: 1250 hr

Disclaimer: Specifications should be verified against the official owner’s or service manual and confirmed on the Caterpillar USA website.

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Ernie Lo

Ernie Lo is a qualified web designer and web developer. He works as an IT support technician and website manager at Benleigh Vending, and he also fixes vending machines.

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