The Caterpillar C13 ACERT is a 400 kW standby diesel generator meeting EPA Tier 3 emissions standards. Ideal for commercial, healthcare, and telecom applications requiring modern compliance.
The Caterpillar C13 ACERT is a 400 kW standby diesel generator designed for commercial, healthcare, and telecom applications that require modern emissions compliance alongside proven Cat reliability. Displacing 12.5 liters in an inline-6 configuration, the C13 meets EPA Tier 3 standards — an advantage in California air basins where air quality management districts impose stricter operational limits on standby generators.
The C13 is an active Cat product with full factory and dealer support, available in enclosures from open-skid through weather-protective steel to accommodate indoor mechanical rooms and exposed outdoor installations alike. Its 120/208V availability also makes it suitable for facilities that have not upgraded to 480V distribution.
We have deployed and serviced C13 units across a range of commercial and healthcare sites in the Bay Area. The Tier 3 ACERT engine is clean-running and requires standard Cat ACERT service intervals — particularly attentive fuel system maintenance to sustain reliable operation. We find the C13 to be one of the more straightforward Cat platforms to maintain, with excellent parts availability through the dealer network.
Request a quote
Get pricing & lead time on the Caterpillar C13
Tell us about the application — kW, voltage, application, install timeline — and we'll respond within one business day with budgetary pricing, lead time, and any sizing notes.
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
9.3 hours(0.4 days)
Fuel consumption ≈ 21.60 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 Caterpillar C13 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
Fuel quality / degradation
Hard starting, filter clogging, reduced power
4,380+
moderate
Turbocharger
Power loss, excessive smoke under load
12,000+
moderate
Battery
Failed to start, slow crank
8,760+
minor
Frequently Asked Questions
What emissions tier is the Caterpillar C13 generator?
The C13 ACERT meets EPA Tier 3 emissions requirements, a step beyond the Tier 2 certification of older Cat models and well-suited to installations in air quality management districts with stricter non-road engine requirements.
What is the standby power output of the C13?
The C13 ACERT produces 400 kW standby and 350 kW prime at 1800 RPM, displacing 12.5 liters across six cylinders.
Is the C13 a good fit for telecom and edge data center installations?
Yes. The C13's 400 kW rating, compact inline-6 footprint, and active support status make it a strong candidate for telecom central offices, edge data centers, and medium commercial buildings requiring dependable standby power.
Similar models
C
Caterpillar
New
Cat C15
500 kW standby · Diesel · Liquid-cooled
500 kW diesel standby generator with Cat C15 ACERT engine. Large commercial standby for hospitals, high-rises, and municipal infrastructure.
Tier 23-phasehospitalhigh-rise
C
Caterpillar
New
Caterpillar C18
750 kW standby · Diesel · Liquid-cooled
The Caterpillar C18 ACERT is a 750 kW standby diesel generator — the highest-output single inline-6 in Cat's ACERT lineup. Supports 4160V medium-voltage output for hospital and campus applications.
Tier 23-phasehospital-mediumcampus
C
Cummins
New
Cummins QSL9
400 kW standby · Diesel · Liquid-cooled
400 kW standby / 350 kW prime diesel generator. Cummins QSL9 inline-6 8.9L platform for commercial standby, medium hospitals, campuses, and telecom facilities.
Tier 33-phasecommercial-standbyhospital-medium
Need service or parts for the Caterpillar C13?
We service every major OEM and stock genuine parts for the most common models.