Energy Storage in Texas
Battery energy storage systems (BESS) store electricity when power demand is low, at night, or when solar power is abundant then discharge it when power is needed most. The deployment of BESS is growing in the Electric Reliability Council of Texas (ERCOT), providing much needed dispatchable electricity. BESS is the fastest growing technology in ERCOT and BESS is now participating in all of ERCOT’s ancillary service products, which are designed to maintain grid stability and reliability. ERCOT data shows BESS is increasing grid reliability and driving affordability.
BESS adapts swiftly and effectively to dynamic grid conditions, efficiently addressing conditions such as the evening decline in solar output, unexpected outages of thermal plants, fluctuations in wind generation, grid frequency shifts, and unanticipated demand changes. BESS is scalable and can be deployed anywhere in Texas, driving reliability while providing communities with new tax revenue and landowners with steady income. And with new fire safety and decommissioning laws, landowners and communities are protected, which will facilitate responsible and needed growth of BESS to bolster grid reliability.
Installed Grid-Scale Energy Storage Capacity
- 21,149 MW
- operating energy storage capacity in Texas
- 11,980 MW
- Electric Reliability Council of Texas maximum battery storage output record
- as of 8/1/2026
- 20%
- Amount of the grid powered by battery storage during the evening on March 13
- ~$29 Billion
- invested in Texas*
- *Based on National Renewable Energy Laboratory capital cost data
The Electric Reliability Council of Texas surpasses the California Independent System Operator for most operating battery storage capacity in the United States
Percent of total additions
- 51.49%
- Electric Reliability Council of Texas
- Q2-25 additions
- 32.25%
- Western Electricity Coordinating Council
- Q2-25 additions
- 36.25%
- California Independent System Operator
- Q3-25 planned additions
- 31.08%
- Western Electricity Coordinating Council
- Q3-25 planned additions
- 14.173 GW
- Texas has the most capacity
- by the end of Q2
Data as of Q2-25
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