ERT500™ Natural Gas Generator
Flexible, Modular Onsite Power for Critical Facilities
A compact 500 kW building block that delivers scalable reliability, quieter operation, and cleaner performance than diesel.
Operational Microgrids
Unit Run Hours
Combined Reliability
GW of Power
Commissioned or Under Construction
Designed for Uptime. Built for Confidence.
ERT500™ is purpose-built for facilities that need flexibility without compromise. From hospitals to water treatment plants to utilities to other mission-critical sites, it delivers proven reliability, compliance-ready operation, and modular scalability.
One Generator, Multiple Solutions
Prime, bridge, flexible capacity, and backup power—all in a single platform.
Proven Reliability
99.999% combined reliability achieved through 24/7 monitoring and predictive maintenance.
Cleaner, Quieter and Fuel Flexible
Runs on natural gas, renewable natural gas, or propane with up to 99% cleaner emissions than diesel generators, at sound levels quieter than a conversation.
Scalable, Modular Design
Modularity enables fast, efficient field assembly and fault-tolerant designs can be extended to any scale.
Real-World Power for Real-World Stakes
ERT500™ combines straightforward integration with the technical performance that high-stakes environments demand to addresses the operational needs of both executives and engineers.
Critical Infrastructure
Hospitals & Healthcare
The ERT500™ ensures hospitals and healthcare facilities maintain continuous power to protect patients, critical equipment, and sensitive operations during outages. The system is powered by clean natural gas delivered via underground pipelines, and its quiet operation minimizes disruption while supporting community health and safety.
Electrical Utilities
The ERT500™ enhances utility service by providing reliable onsite generation to support customers and communities during outages or grid disruptions. The system also delivers bridge power for large loads while awaiting grid interconnection and flexible capacity to support the grid during periods of strain or peak stress.
Manufacturing Facilities
The ERT500™ keeps manufacturing facilities running smoothly by providing reliable power that prevents downtime and protects sensitive equipment. Its scalable, flexible dual-purpose design supports future growth while also helping to stabilize the grid.
Clean, Reliable Power for Bridge, Flex, and Backup Applications
Delivering up to 500 kW in a compact footprint, the ERT500™ provides versatile bridge power, backup power, and flexible capacity while meeting or exceeding industry standards for power density, start time, transient management, and emissions.
Designed for operational convenience and low community impact, its integrated GraniteEcosystem™ information platform enables predictive maintenance and increased uptime. The patented low-emissions natural gas design reduces noise, avoids diesel refueling challenges, and removes runtime restrictions.
ERT500™ Specs & Features
The ERT500™ pairs proven reliability with compliance-ready design and comprehensive performance data to meet the demands of critical operations.
Capacity
500 kW ESP / 450 kW LTP/PRP
Neighborhood friendly
Compact 10 x 8 ft modular unit with a low profile and quiet operation, ideal for urban and environmentally sensitive areas
Transient Response
Enchanted Rock generators meet or exceed rigorous ISO 8528-5 G3 diesel standards, delivering fast, stable responses to sudden load swings
Dual-Fuel Capable
Fueled by pipeline natural gas or RNG, with propane and hydrogen-blend options —eliminating reliance on diesel deliveries and refueling logistics
Low Emissions
Offering both Standard Low Emissions and CARB Ultra-Clean options, the ERT500™ meets the nation’s strictest CARB-DG standards and helps sites avoid Title V air permits
Integration
Plug-and-play at 480 V, compatible with typical diesel footprints
Advanced Generator Power (AGP)
The AGP rating is the maximum power which a generating set is capable of delivering while supplying a variable or continuous electrical load during unlimited run hours. With this, Enchanted Rock will be able to dynamically adjust maintenance intervals based on load and duty cycles, while also allowing for prolonged operation at load in parallel with a utility.
GraniteEcosystem™ + Enchanted Rock Services
Every ERT500™ unit is supported by GraniteEcosystem™, Enchanted Rock’s proprietary control platform, and its fully staffed Microgrid Control Center in Texas.
Always-on monitoring
Real operators oversee performance in real time, around the clock.
Predictive maintenance
Advanced analytics identify and address potential issues before they impact operations.
Weather and grid-aware operations
Systems respond proactively to changing conditions to maintain uptime and stability.
End-to-end service
From design and installation to continuous monitoring and O&M, we support your power needs at every stage.
ERT500™ is part of an integrated ecosystem that ensures your facility is prepared when it matters most.
