ERock

What ERock does

ERock (NYSE: EROC; legal name Enchanted Rock, LLC) designs, manufactures, deploys, and operates distributed natural gas power generation and microgrid systems for mission-critical customers across the United States. The core hardware portfolio consists of the 500 kW ERT500 modular natural gas generator and the 1.5-3.5 MW RockBlock scalable power system, both designed for pipeline-fed, water-free, low-noise (<70 dBA), CARB-compliant operation with optional RNG and hydrogen-blend capability. These assets are orchestrated by GraniteEcosystem, a proprietary software platform with six modules covering operating system (GraniteOS), real-time analytics (GraniteInsight), data lake (GraniteQuarry), customer interface (GraniteView), dispatch orchestration (GraniteControl), and machine learning (GraniteAI). The platform monitors thousands of data points across 369+ operational microgrids via a Houston-based 24/7 Network Operations Center, supporting a reported 99.999% combined fleet reliability and over 38,500 customer outage hours prevented as of year-end 2025.

The company makes money through three primary streams: a recurring Electrical Resiliency-as-a-Service offering (subscription-based with multi-year contracts covering design, installation, operation, and maintenance), one-time Engineering, Procurement & Construction revenue on customer-owned assets, and usage-based grid participation revenue when dual-purpose systems sell capacity into demand response and ancillary services markets during non-emergency periods. Pricing is custom-quoted, with the managed service model reducing customer upfront cost to as little as 10-20% of system cost. Go-to-market is direct enterprise field sales supplemented by a utility partner program (e.g., Entergy's Power Through Program) that resells resiliency-as-a-service to C&I end-customers.

ERock targets eight customer segments, with data centers (hyperscale AI campuses needing prime/bridge power ahead of interconnection), hospitals and healthcare facilities, water and wastewater utilities, government and defense installations, distribution and logistics, grocery and retail chains, manufacturing, and energy utilities. Named customers include H-E-B, Citizens Medical Center, Huntsville Memorial Hospital, the City of Houston Northeast Water Purification Plant (32 MW), California Department of Water Resources (148 MW across three sites), Marine Corps Base Quantico, the U.S. Army Engineer Research and Development Center, and an unnamed national superstore retailer with a 196.8 MW portfolio. As of mid-2026, the company reported approximately $191 million in trailing revenue, 251-500 employees, an installed base of approximately 1 GW, and a contracted backlog of $1.3 billion following a June 2026 NYSE IPO that raised $600 million at a $5 billion post-money valuation.

Name

ERock

Legal name

Enchanted Rock, LLC

Website

https://erock.com

Company type

Public

Founded year

2006

Operating status

Ipo

Headcount range

251–500 employees

Short description

ERock (NYSE: EROC) designs, manufactures, and operates distributed natural gas generators and microgrids managed by its GraniteEcosystem software, delivering Electrical Resiliency-as-a-Service to data centers, hospitals, water utilities, military bases, retailers, and manufacturers across the United States.

Ownership category

akta.pro rank

Product category

Distributed Power Generation / Microgrid Infrastructure

NAICS

Turbine and Turbine Generator Set Units Manufacturing (333611), Electric Power Generation (22111)

SIC

Motors & Generators (3621), Engines & Turbines (3510)

akta.pro primary industry

Backup & Resilience Power Systems (Standby Generators, Critical Facilities) (EUACALAG)

akta.pro secondary industry

Engine Generator & Microgrid Power Plant EPC (Diesel/Gas Recip) (EUAEAAAJ)

Keywords

• Distributed power generation
• Natural gas microgrids
• Resiliency-as-a-service
• Backup power systems
• Microgrid software platform

Headquarters

HQ city

Houston

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Technology or R&D, Personnel, Marketing or Sales

Revenue model

1. Resiliency-as-a-Service (Managed Services): Fully managed power solution covering design, installation, operations, and maintenance with flexible pricing plans. Revenue generated through recurring service fees; systems also participate in energy markets (demand response, grid support) during non-emergency times to offset costs. Customers choose between subscription-based service (minimal upfront investment) or asset ownership.
2. Engineering, Procurement & Construction (EPC): End-to-end EPC services for turnkey onsite power projects. Covers engineering, permitting, air permitting, interconnection, procurement, construction, installation, commissioning, and testing. Revenue recognized as a one-time service component of project delivery.
3. Dual-Purpose Grid Participation Revenue: Systems generate revenue by participating in energy markets (demand response, grid support, capacity auctions) when not serving customer backup needs. This revenue offsets the total cost of ownership for customers and enables the 10-20% upfront cost model for resiliency-as-a-service.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels6 records

Core offering

ERock designs, manufactures, and operates distributed onsite natural gas power generation systems — including the proprietary ERT500™ 500 kW modular generator and RockBlock™ 1.5–3.5 MW modular power system — managed through its GraniteEcosystem™ intelligent software platform for 24/7 monitoring, dispatch, and optimization. The company sells these systems to enterprises via direct sales and through utility partner programs, offering Resiliency-as-a-Service subscriptions, asset ownership, and turnkey EPC plus O&M services. Customers include hyperscale data centers, hospitals, water utilities, government/defense installations, grocery/retail chains, and manufacturers needing always-on power.

Product overview

ERock delivers a unified platform-plus-modules architecture centered on proprietary natural gas generators (ERT500™ and RockBlock™) managed through the GraniteEcosystem™ software platform. The portfolio comprises hardware products (ERT500™ 500 kW modular generator, RockBlock™ 1.5–3.5 MW scalable power systems), the GraniteEcosystem™ platform with six integrated software modules (GraniteOS™, GraniteInsight™, GraniteQuarry™, GraniteView™, GraniteControl™, GraniteAI™), and service offerings (Electrical Resiliency-as-a-Service, Engineering/Procurement/Construction, Operations & Maintenance). Solutions include Backup Power, Bridge-to-Grid, Flexible Capacity, and Microgrids, all designed for rapid deployment, long-duration reliability, and low emissions for mission-critical facilities including data centers, utilities, healthcare, and government.

Differentiator

Problem solved

Functional benefit

Brands

• GraniteEcosystem™: Proprietary software platform that integrates intelligent design, automation, real-time monitoring, and AI-driven optimization for distributed energy network management

Products and services

• ERT500™ Natural Gas Generator A compact 500 kW modular natural gas generator providing scalable reliability for bridge power, backup power, and flexible capacity applications at commercial, industrial, and institutional facilities.
• RockBlock™ Modular Power System A megawatt-scale (1.5–3.5 MW) modular onsite natural gas power system designed as a direct diesel replacement for mission-critical facilities, offering unlimited runtime via pipeline natural gas and up to 99% lower emissions.
• GraniteEcosystem™ Software Platform An end-to-end intelligent software platform integrating microgrid operating system, real-time analytics, data lake, customer-facing interface, intelligent asset dispatch, and machine learning modules for monitoring, optimization, and predictive maintenance of distributed energy resources.
• Electrical Resiliency-as-a-Service A fully managed, subscription-based power protection service covering design, installation, operations, and maintenance of onsite generation systems, with dual-purpose grid participation revenue that can reduce customer upfront costs to 10–20% of total system cost.
• Engineering, Procurement & Construction (EPC) Services End-to-end engineering, permitting, procurement, construction, and commissioning services for turnkey onsite power projects delivered to commercial, industrial, and institutional customers.
• Operations & Maintenance Services 24/7/365 monitoring and proactive maintenance of customer onsite generation systems delivered through a Houston-based Network Operations Center and field service teams, supporting 99.999% fleet reliability.

Quantifiable outcome

• 99.999% combined reliability across 369+ operational microgrids
• +9 more outcomes

Named customers12 records

Segments8 records

Ideal customer profiles6 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability4 records

Feature5 records

Partnerships

Eight partnerships are on record, tiered core and minor.

• Entergy (Power Through Program)coreStrategic or Co-development PartnerEntergy partnered with ERock to launch the Power Through Program, offering Resiliency-as-a-Service to Entergy's commercial and industrial customers. ERock's Allan Schurr (CCO) and Entergy's Cory Ramsel (VP Portfolio Marketing) co-present on the program. Entergy provides customer access and regulatory support; ERock handles design, build, operate, and maintain. The program enhances Entergy's customer retention and generates new revenue streams.
• U.S. Army Corps of EngineerscoreStrategic or Co-development PartnerPartnered with the U.S. Army Corps of Engineers and local utility provider to deploy a 3.2 MW natural gas system at the U.S. Army Engineer Research and Development Center in Vicksburg, MS. The project protects advanced computing infrastructure from outages.
• California Department of Water Resources (DWR)coreStrategic or Co-development PartnerERock partnered with California DWR to build and operate three front-of-the-meter projects generating 148 MW total through the state's Electricity Strategic Reliability Reserve Program. Each commissioned plant provides 48 MW of fast-response, dispatchable power to local communities.
• Wood MackenzieminorOthersEnergy research and consultancy firm Wood Mackenzie identified ERock's Northeast Water Purification Plant microgrid as the largest supporting a water plant in the country upon completion.
• DoD Tradewinds Solutions MarketplacecoreStrategic or Co-development PartnerERock earned 'Awardable' status on the Department of Defense (DoD) Tradewinds Solutions Marketplace, demonstrating adherence to the highest government contracting standards. This enables ERock to pursue federal contracting opportunities.
• Duke University Nicholas InstituteminorStrategic or Co-development PartnerDuke University's Nicholas Institute for Energy, Environment & Sustainability released a white paper (Rethinking Load Growth 2025) citing ERock's expertise in flexible interconnection solutions, behind-the-meter generation as grid assets, and Bridge-to-Grid collaboration with Microsoft. ERock did not fund or contribute to the research.
• ERCOTminorStrategic or Co-development PartnerERCOT participated in a joint webinar panel with ERock and PG&E exploring how onsite generation can transform large loads into grid assets rather than liabilities.
• PG&EminorStrategic or Co-development PartnerPG&E participated in a joint webinar panel with ERock and ERCOT exploring flexible capacity solutions for utilities serving large loads.

Scale indicators13 records

Recent moves8 records

Expansion highlights2 records

Emerging players

• Mainspring Energy: Private company developing linear generator technology for distributed power generation targeting data centers and microgrids. Emerging direct competitor in fuel-flexible, low-emission on-site generation with overlapping customer use cases but smaller installed base.

Broad incumbents

• Wärtsilä: Finland-listed global leader in engine-based power plants, including flexible gas and multi-fuel solutions for grid balancing and distributed generation. Comparable engine-based technology platform but oriented to larger utility-scale plants and marine, with overlap in flexible capacity applications.
• Caterpillar: NYSE-listed global manufacturer of diesel and natural gas engine generator sets across industrial, commercial, and utility markets. Broad incumbent in engine-based power generation with overlapping product offering to ERock's ERT500 and RockBlock, but spanning many other industrial equipment categories.
• Cummins: NYSE-listed diversified power solutions provider with strong presence in engine-based generator sets for distributed generation, data centers, and microgrids. Overlaps with ERock's core engine-generator business while serving diesel, natural gas, and hybrid applications at multiple scales.
• Kohler Power Systems: Privately-held division of Kohler Co. manufacturing industrial generators, transfer switches, and power systems for commercial, industrial, and mission-critical applications. Overlapping product portfolio in natural gas and diesel gensets serving hospitals, data centers, and commercial facilities.
• Rolls-Royce Power Systems (MTU): Division of Rolls-Royce providing MTU-branded engine-based power generation systems for distributed, backup, and microgrid applications. Comparable reciprocating engine technology and customer overlap in data centers, healthcare, and critical infrastructure.

Direct peers

• Bloom Energy: NYSE-listed fuel cell company deploying solid oxide fuel cells for distributed power and microgrid applications. Direct competitor in clean distributed generation for data centers and critical infrastructure, with overlapping customer base but different underlying technology (fuel cells vs. reciprocating engines).
• Generac Power Systems: NYSE-listed leader in backup power generators serving residential, commercial, and industrial customers. Most direct competitor in distributed backup generation, though Generac's portfolio skews diesel/propane and residential whereas ERock focuses on natural gas and mission-critical commercial/industrial sites.

Others

• Vertiv Holdings: NYSE-listed provider of critical digital infrastructure including power management, thermal management, and IT systems for data centers. Adjacent player in the data center power ecosystem with overlapping end customers but focused on UPS, power distribution, and cooling rather than on-site generation.
• Fluence Energy: NASDAQ-listed energy storage technology and services provider for utility-scale and commercial applications. Alternative technology competitor in distributed power/grid services, addressing similar customer pain points around grid reliability and flexible capacity but via battery storage rather than reciprocating engines.

Market position

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/enchanted-rock

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles16 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about ERock