Energy Infrastructure · Power & Resilience

St. Gall I & II Battery Energy Storage System

Power200 MW
Energy400 MWh
Duration2 Hours
CustomerJupiter Power
CODQ2 2024 & Q3 2025

Project Overview

Rapid Delivery, Proven Performance

Energy Vault's B-VAULT™ AC battery energy storage system (BESS) shifts regional wind and solar generation, stabilizing the Texas grid while increasing customer revenue.

Located near Fort Stockton in Pecos County, Texas, the St. Gall Battery Energy Storage System (BESS) is a 200 MW-ac / 400 MWh-ac, multi-phased project utilizing B-VAULT™ battery containers.

The projects operate within the Energy Reliability Council of Texas (ERCOT) energy and ancillary services markets, generating merchant revenue by providing energy shifting and reliability services to the Texas grid.

At the St. Gall site, Energy Vault delivered comprehensive Integration, Engineering, Procurement, and Construction (EPC) services. Leveraging its extensive commissioning and start-up (CSU) expertise and the B-VAULT's user-friendly system architecture.

During operation, Energy Vault's proprietary EMS software, VaultOS™, monitors and controls all aspects of the BESS, from daily operations to advanced market bidding and system maintenance. While undergoing testing, the St. Gall system surpassed ERCOT's 250ms maximum requirement for Fast Frequency Response (FFR).

B-VAULT AC container rows at the St. Gall site

Project Delivery Highlights

What Made This Project Different

The Energy Vault team's deep expertise and collaborative approach were critical to the rapid design and commissioning of this unique, AC-coupled BESS configuration.

Michael Geier ·Chief Technology Officer · Jupiter Power

In the News

Related Coverage

Article

Energy Vault's B-Vault battery powers Jupiter's 100 MW / 200 MWh St. Gall BESS in Texas

ETN News
Press Release

Energy Vault Announces Supply of B-Vault Energy Storage System and Start of Commercial Operations of 100MW/200MWh Jupiter Power BESS at St. Gall

Business Wire
Energy Vault project site

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