Caterpillar 3516 Diesel Generators for Data Centers
The Caterpillar 3516 is a heavy-duty, 2 MW-class V-16 diesel generator (roughly 1500 to 2500 kW) widely standardized for large data center N+1 standby systems. Built for durability and reliable load acceptance, it supports 100% load in one step per ISO 8528-5 and is available with seismic-certified and HVO-capable options. Comp-Utility specs, installs, and services Caterpillar 3516 generators across Central Texas.
What We Provide
Our Capabilities
Generator Sizing and Spec
We size and specify 3516 units and paralleled arrays for data center N+1 and larger redundancy.
Learn moreInstallation and Commissioning
We install, integrate the ATS and switchgear, and prove the system with load bank and transfer testing.
Learn moreMaintenance and Testing
We maintain and load-bank test 3516 units so they start and carry the load every time.
Learn moreData Center Standard
The 2 MW-Class Diesel Built for N+1 Arrays
The Cat 3516 is one of the most widely deployed engines in large data center standby power, prized for durability, strong load acceptance, and easy paralleling into N+1 and larger arrays.
Comp-Utility sizes, installs, commissions, and maintains 3516 systems, including the ATS, switchgear, and load bank and transfer testing that prove the backup chain.
Key Specifications
| Attribute | Caterpillar 3516 |
|---|---|
| Type | Diesel standby generator (mission-critical) |
| Power rating | ~1500 to 2500 kW (2 MW class) |
| Engine | V-16, 3500 series |
| Voltage | 480V to 13800V (LV/MV alternators) |
| Load acceptance | 100% load in one step (ISO 8528-5) |
| Options | Seismic-certified, HVO-capable, paralleling-ready |
| Typical applications | Hyperscale and large data centers, hospitals |
Specifications reflect the Caterpillar 3516 platform; exact ratings, models, and options vary. Contact us to confirm the current configuration for your project.
The Comp-Utility Difference
Why Comp-Utility?
Long-Standing Distribution Partner
As a long-standing distribution partner of Eaton, Schneider Electric, and Vertiv, we specify best-in-class systems and back them with factory-grade service.
Engineer-Owned and Operated
Comp-Utility is owned and operated by engineers, with licensed Texas Professional Engineers (P.E.) on staff. That rigor anchors every design, specification, and installation.
24/7 Emergency Response and Preventative Maintenance
Our technicians provide preventative maintenance programs and 24/7 emergency response, with rapid on-site dispatch across Central Texas when facilities need us most.
Turnkey, Single-Contract Partner
We sell, design, install, and maintain complete infrastructure end to end. One accountable team and one contract for power, cooling, distribution, and cabling.
Licensed, Certified & Recognized
We hold ourselves to the standards of the institutions we serve, from professional licensure and jobsite safety to the industry organizations that set the bar for mission-critical work.
Licensed Professional Engineers
State of Texas (TBPE)
OSHA 30 Certified
Field Technicians
AFCOM Member
Data center industry association
7x24 Exchange Member
Mission-critical infrastructure
Frequently Asked Questions
What is the Caterpillar 3516?
The Caterpillar 3516 is a heavy-duty V-16 diesel generator in the 2 MW class, roughly 1500 to 2500 kW, from Cat's 3500 series. It is renowned for durability and reliable performance and is widely standardized in large data center standby systems, where multiple units are paralleled for N+1 or greater redundancy.
Why is the 3516 so common in data centers?
The 3516 combines proven durability, strong block-load acceptance, and straightforward paralleling, which makes it well suited to the rapid, reliable backup large data centers require. Its 2 MW-class output is a convenient building block for N+1 arrays, and its widespread use means parts and service expertise are readily available. These factors have made it an industry standard.
Can the 3516 accept full load in one step?
Yes. The 3516 is rated to accept 100% load in one step per ISO 8528-5 in appropriate configurations, meaning it can pick up the full critical load quickly when utility power is lost. This fast load acceptance is essential for mission-critical facilities. Comp-Utility verifies load acceptance through commissioning and load bank testing.
How many 3516 units do I need for redundancy?
The number depends on your total load and redundancy target. For N+1, you install one more unit than the load requires so the array carries the load if one generator is down; 2N doubles the capacity. Comp-Utility sizes the array and designs the paralleling switchgear to meet your data center tier and uptime goals.
Is the 3516 available with seismic or HVO options?
Yes. The 3516 platform offers seismic-certified configurations for applicable jurisdictions and is HVO-capable, allowing the use of renewable hydrotreated vegetable oil fuel where desired. Comp-Utility specifies the options your project and location require, including emissions configurations appropriate for Texas air-quality permitting.
What maintenance does a 3516 require?
A 3516 requires regular preventative maintenance: oil, filter, and coolant service, fuel system and fuel quality management, starting battery testing, controls verification, exercising, and periodic load bank testing. For life-safety systems, NFPA 110 sets expectations. Comp-Utility builds and executes a maintenance and testing program tailored to the unit and load criticality.
Can you parallel 3516 generators with existing units?
Yes. We design and integrate paralleling switchgear to combine 3516 units, and can expand or integrate with existing generators where the switchgear and controls allow. Comp-Utility designs the paralleling and load-sharing scheme and verifies it through commissioning so the array operates as one coordinated, redundant power plant.
Who installs and services Caterpillar 3516 generators in Central Texas?
Comp-Utility specs, installs, commissions, and maintains Caterpillar 3516 generators and the supporting ATS and switchgear across Central Texas, including load bank and transfer testing and 24/7 emergency response. Call (512) 346-0999 or email sales@comp-utility.com.