OCI Energy & CPS Energy Launched New BESS Project in Texas
Rising Electricity Demand and Grid Pressure in the U.S.
The electricity demands in the U.S. were fairly constant for years, but this has been quickly changing. What do you think will happen when all air conditioners in one country are turned on?
The U.S. Energy Information Administration reported that the last week of July 2025 marked a major milestone in the country’s electricity demand. Due to extreme heat, millions of people turned on their air conditioners, resulting in power demand exceeding 759,000 megawatts, a record-breaking number for electricity demand in the United States. This new record shows the increasing pressure put on the American power network system.
How Battery Energy Storage Systems Support the Grid?
As a solution, now, massive battery storage projects such as the Alamo City Battery Energy Storage System (BESS) in Texas are emerging as a critical solution to prevent future energy instability.
The official start of the construction of this massive project started on May 19, 2026, in Southeastern Bexar County, San Antonio, Texas. OCI Energy and CPS Energy will bring the region’s largest standalone BESS into full commercial operation by 2027.
San Antonio-based developer, OCI Energy, developed, financed, and will own the project, while San Antonio’s utility, CPS Energy, has a long-term storage capacity agreement and will have an operational contract. With the capacity of 120MW / 480MWh, this will strengthen grid reliability in the region, especially during peak demand. It can power roughly 30 000 homes for up to 4 hours. This project supports CPS Energy’s Vision 2027 strategy to increase battery storage capacity since this brings them toward a total of 520 MW in their portfolio.
The battery supplier for this project is LG Energy Solution Vertech, which is the U.S. energy storage division of LG Energy Solution, the top battery related patent holder in the world with over 69 000 patents.
But what exactly is a Battery Energy Storage System?
Just like our phone batteries save power for later, these utility-scale batteries store electricity for entire communities. This Alamo City BESS does not generate its own energy, but it stores electricity taken from the broader electric grid and releases it later when needed. It charges by pulling power from the CPS Energy grid during periods of excess supply when electricity is abundant and often cheaper. This typically happens during times of high renewable output, like sunny midday for solar or low overall demand.
The battery then discharges during peak demand (e.g., hot summer evenings) to support the grid. CPS Energy uses a diverse portfolio since the battery can technically charge from any of the power sources available, like natural gas, nuclear energy, solar energy, wind power, and coal. Also, the project is explicitly to help to integrate more solar and wind power by storing their variable output and making it available on demand, aligning with America’s profound shift towards renewable energy.
This BESS uses advanced lithium-ion battery technology, specifically integrated into a complete utility-scale energy storage system. LG often deploys Lithium Iron Phosphate chemistry in many recent U.S. grid storage projects for its improved safety, thermal stability, and cost effectiveness.
What Does the Future Hold for Battery Storage Systems?
This project is specifically designed to integrate solar and wind energy through its ability to store this energy and release it according to demand, keeping in mind the shift of America towards renewable energy.
This focus is echoed by local leadership. “Our community is growing at an exponential rate, and we have been focused on our Vision 2027 strategy to meet this growth,” said Rudy D. Garza, President & CEO of CPS Energy. “I’m proud of our team for delivering on our commitment to increase energy capacity for our growing community. Every megawatt that we can provide our customers counts.”
However, despite its positive outlook, increased battery storage comes with some challenges. The high up-front cost of the project still acts as an obstacle, although the decreasing cost of batteries is mitigating the problem. Recycling of batteries also continues to be an issue since large-scale recycling of lithium-ion batteries is still lacking proper infrastructure.
Authorities must establish clear safety standards for fire management and grid connections, while industry leaders must actively mitigate supply chain risks tied to critical materials like lithium.
Energy projects such as the Alamo City BESS project suggest that the future of energy in America may depend upon not just the production of electricity but also its intelligent storage. As EV adoption rises, the push for comprehensive grid modernization accelerates, and the needs of data centers driven by Artificial Intelligence increase, intelligent storage of electricity becomes essential.
The United States is shaping an energy future based on hope and optimism, coupled with technological excellence and enhanced resiliency.
