Natural Gas and Bi-Fuel Standby Generators
Natural gas and bi-fuel standby generators serve facilities where on-site diesel storage is restricted, runtimes are long, or lower emissions are a priority. Natural gas units draw from a pipeline with no fuel storage, while bi-fuel units start on diesel and blend in natural gas to extend runtime. Major options include Caterpillar G3500, Cummins lean-burn and bi-fuel, Generac SG/MG, and Kohler gaseous units. Comp-Utility specs and services them across Central Texas.
What We Provide
Our Capabilities
Fuel Strategy and Sizing
We evaluate natural gas, diesel, and bi-fuel against your runtime, storage, and emissions needs, then size the system.
Learn moreInstallation and Commissioning
We install, integrate the ATS and switchgear, and prove the system with load and transfer testing.
Learn moreMaintenance and Testing
We maintain and test gas and bi-fuel units so they perform when called upon.
Learn moreFuel Flexibility
Continuous Pipeline Fuel or Extended Bi-Fuel Runtime
Natural gas generators avoid on-site fuel storage and aging-fuel concerns by drawing from a pipeline, with lower emissions that can ease permitting. Bi-fuel units pair diesel's fast, reliable starting with natural gas to extend runtime for long outages.
Comp-Utility weighs your runtime, storage, and emissions requirements and designs the right gas or bi-fuel backup system.
Key Specifications
| Type | Representative products | Notes |
|---|---|---|
| Natural gas (single) | Generac SG, Kohler gaseous, Cummins lean-burn | 35 to 400+ kW, no on-site fuel storage |
| Natural gas (modular) | Generac MG (MPS paralleling) | Scalable gas power, 200 to 400 kW units |
| Large gas / CHP | Caterpillar G3500 | 800 to 2500+ kW, CHP-capable |
| Bi-fuel | Generac bi-fuel, Cummins bi-fuel | Starts on diesel, blends gas to extend runtime |
| Typical applications | Urban sites, long-duration backup, low-emission | Where diesel storage is limited |
Specifications reflect representative natural gas and bi-fuel products from our manufacturer partners; exact ratings and configurations 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
When should I choose a natural gas generator?
Natural gas is a good choice where on-site diesel storage is restricted by codes or space, where long-duration runtimes make a continuous pipeline supply valuable, or where lower emissions matter for permitting in urban or regulated areas. It avoids fuel storage and aging-fuel concerns, though it depends on the gas utility's availability during an event.
What is a bi-fuel generator?
A bi-fuel generator starts on diesel for fast, reliable starting and then blends in natural gas, often up to a high percentage, to extend runtime and reduce on-site diesel consumption. It combines diesel's reliability with gas's extended runtime, which is useful for long outages where diesel storage alone would be insufficient. Comp-Utility specifies bi-fuel where it fits.
What are the trade-offs versus diesel?
Diesel offers fast starting, high power density, and fuel independence via on-site storage, but requires fuel management and has higher emissions. Natural gas avoids storage and lowers emissions but depends on the pipeline and is often less power-dense and slower to accept large loads. Comp-Utility weighs these against your reliability and runtime needs.
Can natural gas generators support data centers?
Natural gas and bi-fuel generators can support data centers, particularly where extended runtime or emissions drive the decision, though diesel remains the most common choice for large data center standby because of its fast load acceptance and fuel independence. Comp-Utility evaluates whether gas, bi-fuel, or diesel best fits your reliability and runtime requirements.
What large natural gas options are available?
For larger gas needs, the Caterpillar G3500 series provides lean-burn gas generators from roughly 800 to 2500+ kW and is CHP-capable, while Generac MG modular units parallel for scalable gas power. Comp-Utility specifies the platform and configuration that match your capacity, runtime, and emissions goals.
How do emissions compare for permitting in Texas?
Natural gas generally produces lower emissions of certain pollutants than diesel, which can simplify permitting in urban or regulated Central Texas locations, while modern diesel with after-treatment also meets strict standards. Comp-Utility considers local air-quality permitting when recommending fuel type and configuration for your site.
What maintenance do gas and bi-fuel generators require?
Gas and bi-fuel generators require regular engine service, controls verification, starting battery testing, exercising, and periodic testing, with bi-fuel systems also needing diesel fuel quality management for the diesel portion. Comp-Utility builds and executes a maintenance and testing program tailored to the fuel type and how critical the load is.
Who installs and services gas and bi-fuel generators in Central Texas?
Comp-Utility specs, installs, commissions, and maintains natural gas and bi-fuel standby generators and the supporting ATS and switchgear across Central Texas, including testing and 24/7 emergency response. Call (512) 346-0999 or email sales@comp-utility.com.