December 15, 2025

Gunnar Reliability Project

Building Energy Reliability in Hidalgo County

At every stage, from technology selection and engineering to construction, operation, and emergency preparedness, GridStor prioritizes the safety of our facilities and our neighbors.

Batteries strengthen U.S. infrastructure

Electricity is central to everyday life. Americans need reliable electricity more than ever to heat and cool our homes, grow our businesses, and communicate with each other. GridStor develops, owns, and operates utility-scale battery energy storage systems to support a stable power supply around the clock.

Committed to Edinburg

The facility will increase regional grid reliability and lower blackout risk during high demand.
At every stage, from technology selection and engineering to construction, operation, and emergency preparedness, GridStor prioritizes the safety of our facilities and our neighbors.
GridStor works closely with the local fire department on facility design, construction, and emergency response training before operations begin.
Traffic control will be implemented on East Chapin Road to maintain safe access in/out of the project site and minimize road delays during construction.
The Gunnar Reliability Project has been carefully sited adjacent to existing local electric infrastructure and the communities that need it most.

Located in the City of Edinburg, South Texas

Project Key Facts

150-Megawatt (MW

outdoor battery energy storage system

95,000

average Texas households’ daily needs during periods of high electric usage represent the equivalent power supported.

Neighboring

AEP’s existing Closner Substation

9.7-acre

project property with BESS enclosures on approximately 3 acres

2026

under construction through end of 2026

100

estimated full-time jobs during construction in an emerging technical industry

The GridStor Guarantee

Our team of engineers, developers, safety experts, construction managers and company leaders has over 100,000 megawatts of combined experience in developing, building, and operating power generation and storage projects. Our quiet, emission-free facilities can sit next to businesses, residences, and playgrounds without disturbing neighbors. Our projects create local construction jobs and make significant financial contributions to the local tax base, supporting budgets for roads, schools, and emergency services where we operate.

Safety is our #1 priority

From technology selection and design standards to emergency preparedness, GridStor is committed to the safety of our communities, employees, contractors, partners, and neighbors.

Battery Energy Storage Explained

Held to the highest safety standards

The safe operation of our battery energy storage facilities is essential to providing the stable electric supply that powers ever more of our economy.

Battery Energy Storage Safety

Rigorous codes and standards

Our energy storage projects must meet rigorous codes and standards to be permitted to operate – just like every other part of the electric system.

Codes u0026 Standards

Certified, Tier 1 Technology

Every battery that we integrate with the electric grid is certified and tested at the battery and system-level to meet current safety standards.

Battery Technology Basics

Local and regional collaboration

We collaborate with state, regional, and local governments and first responders to plan, construct and operate each project with safety as a top priority, in compliance with their current standards.

Emergency Response Planning

Building a world where every community has clean energy around the clock.

GridStor builds and operates batteries on the American power grid storing electricity to deliver when and where it is most needed.

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