GridStor Announces Tolling Agreement and Start of Construction for Texas Battery Energy Storage Project
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battery energy storagetechnical
A system that stores electrical energy in rechargeable batteries so power can be used later, like a large-scale rechargeable power bank for homes, businesses, or the electricity grid. It matters to investors because it helps smooth out supply and demand, lets operators sell power when prices are higher, backs up critical services during outages, and supports more renewable generation — all of which can create new revenue streams and reduce operational risk.
MWtechnical
A megawatt (MW) is a unit of electrical power equal to one million watts, used to describe how much energy a power plant, solar farm, wind turbine or industrial facility can produce or consume at a given moment. Investors watch MW figures because they signal the size and revenue potential of energy assets or projects—much like knowing the horsepower of a car tells you how powerful it is—so capacity changes, upgrades or sales can affect future earnings and value.
MWhtechnical
mwh (megawatt-hour) is a standard unit for measuring electricity: one megawatt of power supplied for one hour. Think of it like a fuel tank for electricity — it tells you how much usable energy was produced, consumed or stored, much like gallons in a car’s tank. Investors track MWh to compare generation output, storage capacity and sales volumes, because it directly affects revenue, contracts and the value of power-related assets.
Electric Reliability Council of Texas (ERCOT)technical
The Electric Reliability Council of Texas (ERCOT) is the grid operator that manages most of Texas’s electricity supply and demand, coordinating power plants, transmission lines, and real-time electricity flows like an air-traffic controller for the state’s power system. Investors care because ERCOT’s decisions on grid reliability, outage management, and market pricing directly affect utility revenues, energy company earnings, and the cost and availability of power—similar to how a central dispatcher influences delivery speed and cost in a logistics network.
peak loadtechnical
Peak load is the highest level of demand for a service—most often electricity or other utilities—during a specific time period, like the electricity ‘rush hour’ when everyone uses appliances, heating or cooling at once. It matters to investors because these peak periods drive pricing, require extra capacity or backup systems, and influence a company’s costs, revenue potential and investment needs for infrastructure or storage to meet short bursts of demand.
150 MW Hidalgo County facility expected to begin operations by end of 2026
PORTLAND, Ore.--(BUSINESS WIRE)--
GridStor, a developer and operator of utility-scale battery energy storage systems, announced today execution of a tolling agreement with a Fortune 500 company for the Gunnar Reliability Project, a 150 MW, 300 MWh battery facility in Hidalgo County, Texas. The project has commenced construction and is expected to begin operations by the end of 2026.
“At a time of rapidly increasing power demand, battery energy storage helps ensure affordable, reliable power to households and Lower Rio Grande Valley businesses,” said Chris Taylor, CEO of GridStor. “We are proud to increase our commitment to building battery storage facilities that help Texas sustain its historic economic expansion and deliver cost-effective power.”
Driven by rapid growth in power demand in the state from large industrial customers, the Electric Reliability Council of Texas (ERCOT) forecasts a more than 50% increase in the state’s peak load by 2030. Over 12,000 MW of battery energy storage has been deployed on the ERCOT power system to date.
During construction, the Gunnar Reliability Project is expected to sustain over 100 jobs including skilled tradespersons and apprentices. Once operating, the project will increase the resilience of the Lower Rio Grande Valley region of the ERCOT power system, providing power equivalent to serving 95,000 average Texas households during the hours of greatest demand on the electric grid.
Once completed, the Gunnar Reliability Project will represent GridStor’s second operating battery energy storage facility in Texas. GridStor’s Hidden Lakes Reliability Project, a 220 MW battery energy storage facility in Galveston County, Texas, commenced operations earlier this year.
Backed by Goldman Sachs Asset Management, GridStor manages a pipeline of over 3 GW of battery storage projects in later-stage development or under construction across the western and central U.S. The company is focused on executing and delivering projects that provide cost-effective, near-term solutions to utilities, data centers, and other large industrial customers in regions with rapidly growing energy demand.
About GridStor
GridStor strengthens America’s power system reliability by building and operating battery projects, storing electricity to deliver when and where it’s most needed. GridStor develops, acquires, and operates utility-scale, standalone battery storage projects primarily across North America. Visit us at www.gridstor.com and on LinkedIn.
About Goldman Sachs Asset Management
Goldman Sachs Asset Management is the primary investing area within Goldman Sachs (NYSE: GS), delivering investment and advisory services across public and private markets for the world’s leading institutions, financial advisors and individuals. The business is driven by a focus on partnership and shared success with its clients, seeking to deliver long-term investment performance drawing on its global network and deep expertise across industries and markets. Goldman Sachs Asset Management is a leading investor across fixed income, liquidity, equity, alternatives, and multi-asset solutions. Goldman Sachs oversees approximately $3.5 trillion in assets under supervision as of September 30, 2025. Follow us on LinkedIn.
