B2U Launched Texas Battery Storage Site
The Bexar Martinez facility utilizes repurposed electric vehicle batteries to provide grid services across Texas.
Updated on Sept. 26, 2026 in Electric Vehicles
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B2U Storage Solutions has officially begun commercial operations at its new Bexar Martinez battery energy storage system in Texas. The facility provides 28 MWh of grid services to the local energy market using repurposed electric vehicle batteries.
Why it matters
This project supports regional grid reliability while advancing sustainable infrastructure goals by using second-life batteries to reduce waste and lower overall storage costs. It specifically qualifies for the domestic content bonus under the federal Investment Tax Credit.
The Bexar Martinez project adds 28 MWh of energy storage to B2U's portfolio, which now exceeds 50 MWh of total capacity serving ERCOT. B2U manages more than 5,000 repurposed electric vehicle batteries across Texas and California.
The players
B2U Storage Solutions
This company specializes in developing energy storage systems that utilize repurposed electric vehicle batteries.
B2U Infrastructure Partners
This entity serves as the owner of the Bexar Martinez battery energy storage system.
CPS Energy
This municipal utility provider serves the San Antonio area and maintains the territory where the new facility is located.
The details
Located within the CPS Energy service territory, the Bexar Martinez site is the second project B2U has developed in Texas. The system functions through patented storage cabinets that integrate repurposed battery cells into a functional grid-scale network.
Timeline
Commercial operations at the Bexar Martinez facility began on September 26, 2026.
B2U plans to deploy an additional 50+ MWh of storage capacity within the next six months.
Roadmap
The deployment of second-life batteries represents a structural evolution in the energy storage industry, moving away from a total reliance on new raw materials. By prioritizing repurposed cells, B2U is positioning itself to compete on cost-efficiency while meeting rising demands for grid stability.
The expansion of localized energy storage capacity serves to stabilize the grid, potentially reducing the frequency of service interruptions for residents in the region. These systems help lower the overall cost of energy storage by repurposing existing hardware rather than manufacturing new units.
The takeaway
Repurposing electric vehicle batteries provides a viable path to scale grid-level storage without the high costs associated with mining new minerals. As this technology matures, it will likely play an essential role in balancing the intermittent energy output of renewable power sources.
What happens next
B2U expects to deploy an additional 50+ MWh of energy storage capacity within the ERCOT market over the next six months.
Further reading
Learn more about sustainable energy solutions in our Electric Vehicles section.
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Do you support using repurposed electric vehicle batteries to help provide energy for your local grid?
