Overview#
The Caterpillar C7 generator is a 200 kW standby diesel generator set powered by the 7.01-liter C7.1 ACERT inline-6 engine. It is the entry point of Cat's ACERT standby generator range and occupies a practical segment for retail properties, small offices, telecom central offices, and light commercial buildings that need dependable emergency power with a compact physical footprint and Tier 3 emissions compliance.
The C7.1 ACERT uses a common-rail electronic fuel injection system governed by Cat's ADEM A4 electronic governor, a step up from the MEUI mechanical-electronic injection used on some earlier models. This provides precise fuel metering and smooth transient response under step-load events. The generator set accepts 100% rated load in one step per NFPA 110 and conforms to ISO 8528-5 transient response requirements, making it code-compliant for life-safety standby applications.
Available in 480V, 208V, 600V, and 240V three-phase configurations, the C7 covers the most common utilization voltages in small-to-medium commercial construction. Sound-attenuated and weather-protective enclosure options make it suitable for noise-sensitive neighborhoods and exposed outdoor pad installations across the Bay Area.
Technical Specifications#
| Parameter | Value |
|---|---|
| Standby rating | 200 ekW / 250 kVA |
| Prime rating | 180 ekW |
| Frequency | 60 Hz |
| Speed | 1800 rpm |
| Power factor | 0.8 |
| Engine model | Cat C7.1 ACERT |
| Displacement | 7.01 L (428 in³) |
| Bore x stroke | 105 mm x 127 mm (4.1 in x 5.0 in) |
| Compression ratio | 16.7:1 |
| Aspiration | Turbocharged Air-to-Air Aftercooled |
| Fuel injection | Electronic Common Rail |
| Governor | ADEM A4 |
| Emissions | EPA Tier 3 (Stationary Emergency) |
| Fuel consumption @ 100% load | 14.9 gal/hr (56.4 L/hr) |
| Fuel consumption @ 75% load | 12.1 gal/hr (45.8 L/hr) |
| Fuel consumption @ 50% load | 8.6 gal/hr (32.6 L/hr) |
| Controller | EMCP 4.2 (standard), EMCP 4.4 (optional) |
| Alternator insulation | Class H |
Our Service Experience#
We work with C7 units across retail and small commercial accounts throughout the Bay Area. The C7.1 ACERT shares tooling and service procedures with the C9, which simplifies preventive maintenance for fleets that include both models. The common-rail fuel system requires clean fuel -- in standby installations where the unit runs infrequently, quarterly fuel polishing is a standard part of our PM protocol.
The Tier 3 ACERT engine is clean-running relative to older Cat diesel platforms, and Cat's active support status ensures filters, belts, and injector components are consistently available on short lead times through the dealer network. These units are straightforward to diagnose with Cat ET service software and respond well to standard Cat S-O-S fluid analysis for trending wear metals.
Frequently Asked Questions#
What is the power rating of the Caterpillar C7 generator? The Cat C7.1 ACERT generator is rated at 200 ekW (250 kVA) standby and 180 ekW prime at 60 Hz / 1800 rpm, 0.8 power factor. It is available in 480V, 208V, 600V, and 240V configurations.
What engine does the Cat C7 generator use? The C7.1 ACERT -- a 7.01-liter inline-6, four-stroke turbocharged air-to-air aftercooled diesel with a 105 mm x 127 mm bore and stroke, 16.7:1 compression ratio, and common-rail electronic fuel injection governed by the ADEM A4 electronic governor. It is EPA Tier 3 certified for stationary emergency use.
What is the fuel consumption of the Cat C7 generator? At the 200 ekW standby rating, the C7.1 consumes 14.9 gal/hr at 100% load, 12.1 gal/hr at 75% load, and 8.6 gal/hr at 50% load on No. 2 diesel fuel.
What voltage options are available on the C7? The C7 is available in 480V, 208V, 600V, and 240V configurations, covering both legacy and modern three-phase distribution systems for small to medium commercial buildings.
Is the Caterpillar C7 a good choice for a small office or retail building? Yes. At 200 kW standby, the C7.1 ACERT is sized for small offices, retail centers, and telecom facilities that need reliable three-phase standby power with a compact footprint. Active Cat dealer support and Tier 3 emissions compliance make it a practical choice in California air districts.
