RockBlock™
The Scalable Backup Power Built to Replace Diesel
RockBlock™ is our modular onsite power system that delivers the uptime enterprises demand, but without the noise, emissions, or water use of diesel. Fueled by natural gas and engineered for mission-critical facilities, RockBlock™ is redefining resilience for the age of AI.
Mission-Critical Reliability & Compliance
Uptime You Can Trust
Designed to provide power during long-duration outages, the RockBlock™ series leverages predictive maintenance and monitoring to deliver 99.999% combined reliability.
Built for the Strictest Standards
Proven Through Real Events
From hurricanes to winter storms, Enchanted Rock fleets have kept hospitals, data centers, and manufacturers online when the grid failed. Fueled by underground natural gas pipelines, RockBlock™ provides unlimited runtime, eliminating the refueling and onsite storage challenges that plague diesel.
Clean, Reliable Power for Bridge, Flex, and Backup Applications
For engineers and experts who need reliable power for their facilities, RockBlock™ combines high-density design with features that simplify siting, integration, and long-term performance.
Power Density
Up to 2x diesel capacity at 5.6 kW per sqft with our 2.5 MW unit vs. a diesel 2.5 MW generator’s 2.9 kW.
Footprint
Compact — as little as 448 sqft for a 2.5 MW unit compared to 846 sqft for the same size diesel system.
Sound Levels
Quieter than a conversation at <68.5 dBA at 23 ft (vs. diesel’s 80–85 dBA).
Runtime
Unlimited operation, fueled by natural gas or renewable natural gas delivered via underground pipeline.
Integration
Drop-in diesel replacement at 480 V — no electrical infrastructure changes required.
Transient Response
Enchanted Rock generators meet or exceed rigorous ISO 8528-5 G3 diesel standards, delivering fast, stable responses to sudden load swings.
RockBlock Series
Available from 1.5 to 3.5 MW capacities, with either Standard Low Emissions or CARB Ultra-Clean Emissions, each RockBlock also has optional Reliability+ for additional resilience. Choose a spec sheet below to learn more.
Natural Gas vs. Diesel
For decades, diesel was the default. But the demands of today’s mission-critical operations and tomorrow’s environmental standards require more. RockBlock™ was engineered to outperform diesel in every way that matters:
Cleaner air than diesel
Up to 99% lower emissions and fewer particulates than Tier 4 diesel generators, supporting community, sustainability, and regulatory goals.
Neighborhood-friendly
Quiet operation and low visual profile make it well-suited for urban settings and welcoming to neighbors of every kind.
Lower cost of ownership
Option to offset system costs through grid participation and other revenue streams.
No fuel headaches
Fueled by underground natural gas, you avoid onsite fuel storage, fuel maintenance requirements, and refueling risks.
Built-in redundancy
Improved reliability through use
Frequent operation continuously tests and conditions units, reducing risk when outages strike.
Unlike idle diesel assets, RockBlock™ is capable of participating in grid markets.
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.
Innovation meets unstoppable power
Nearly