ERock

About ERock

Enchanted Rock, founded in 2006 by Thomas McAndrew, operates as a national provider of electrical resiliency-as-a-service. McAndrew, who now serves as a board member and strategic advisor after stepping down as CEO in June 2025, leveraged his background from the U.S. Navy's nuclear program, where he gained expertise in reliability systems, redundancy, and diesel generators. This experience informed the company's direction after Hurricane Ike in 2008 revealed high failure rates in conventional backup generators. The company name originates from McAndrew forming the business plan while hiking at Enchanted Rock State Natural Area in Texas.

The core of the company's business is providing fully managed, natural gas-powered microgrids to ensure uninterrupted power for its clients during grid failures. This 'Resiliency-as-a-Service' model involves Enchanted Rock handling the design, installation, 24/7 monitoring, and maintenance of the systems, relieving the customer of operational complexities. The business model has a dual purpose: the microgrids provide backup power to the client and, when not needed for backup, can sell power back to the main electrical grid, such as ERCOT in Texas. This generates revenue that helps offset the cost of the system for the customer, making it a more affordable alternative to traditional diesel backups.

Enchanted Rock serves a diverse client base that includes critical infrastructure, commercial, and industrial customers for whom power is mission-critical. Notable clients include grocery chains like H-E-B, data centers for companies like Microsoft, manufacturing plants, water purification plants, and healthcare facilities. The company’s microgrids are designed to be quieter and have a smaller footprint than diesel equivalents. A key feature is the use of natural gas and renewable natural gas (RNG), which produce significantly lower emissions than diesel generators and can help clients meet sustainability goals. The technology is also adaptable for future fuels, with successful tests using hydrogen blends. In May 2024, the company launched its 'Bridge-to-Grid' solution, offering temporary prime power for large-scale operations like data centers that are awaiting a permanent grid connection.