In the heart of Napa Valley, the city of Calistoga is poised to become a model for resilient, sustainable energy infrastructure. The Calistoga Resiliency Center (CRC), developed by Energy Vault in partnership with Pacific Gas & Electric (PG&E), represents a pioneering approach to long-duration energy storage and microgrid design.
Project Overview
The CRC is a hybrid energy storage facility that integrates hydrogen fuel cells with lithium-ion batteries, coordinated by Energy Vault’s VaultOS™ energy management system. Designed to deliver 8.5 MW of peak power and 48 hours of continuous backup energy, the system is purpose-built to operate during wildfire-related Public Safety Power Shutoffs (PSPS).
Technical Highlights
- Energy Capacity: 293 MWh
- Peak Output: 8.5 MW
- Backup Duration: 48 hours
- Core Components:
This dual-technology design allows for both fast response and long-duration coverage, making the CRC highly adaptable for extended outages or grid instability events.
Resilience and Emissions Benefits
Unlike diesel generators, this system offers zero-emission backup with black start capability and seamless islanding. Its design supports local critical loads—such as emergency services and communications infrastructure—independently of the main grid.
As PSPS events become more frequent across California, Calistoga’s solution demonstrates how clean energy technologies can replace legacy fossil-based backup and meet both reliability and decarbonization goals.
Deployment Timeline
As of May 2025, the CRC is mechanically complete and undergoing commissioning. Commercial operation is expected by mid-year. The project may serve as a replicable model for fire-prone communities nationwide looking for clean, non-diesel microgrid solutions.
Building the Expertise to Design Systems Like Calistoga
For professionals looking to specialize in hybrid microgrids, long-duration storage systems, and advanced control strategies, the Microgrid Systems Certificate Program offers comprehensive training.
Developed by Telepath Systems and Cleveland State University, the course covers microgrid architecture, DER integration, digital twin modeling, and inverter-based controls—skills critical to building systems like the Calistoga Resiliency Center.