Second-life battery energy storage system (BESS) firms B2U, Moment and Rebaba are advancing project operations in Texas, US compliance, and new financing in Europe, respectively.
B2U begins operations at second repurposed Texas BESS project
Second life energy storage firm B2U Storage Solutions has put its 28MWh Bexar Martinez BESS project into commercial operation near San Antonio, Texas, US.
Announced 9 September, the Bexar Martinez project is connected within utility CPS Energy’s service territory and built from repurposed electric vehicle (EV) batteries.
It is the second site in Texas where B2U has developed and equipped its patented second-life BESS cabinets. The company claimed that projects using its technology receive “significantly higher returns than those available from other domestic BESS vendors.”
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The Bexar Martinez project and B2U’s other sites also qualify for the domestic content bonus under the investment tax credit (ITC), have received 3rd party financing, and have been acquired by B2U Infrastructure Partners.
In November 2023, B2U put its second major project into commercial operation, the 3MW/12MWh Cuyama BESS using Honda Clarity EV batteries, located near New Cuyama, California.
The company’s flagship project, the 28MWh Sierra facility, which is also located in California, uses batteries from multiple vehicle manufacturers, including Nissan, Chevy, Tesla and Ford.
In December 2025, our colleagues at EV Infrastructure News reported that B2U launched a structured finance fund with a portfolio of seven second-life BESS projects.
The company will retain an interest in the fund while managing day-to-day operations of projects owned by the fund. Via this strategic financing, B2U will divest operating projects and invest the proceeds in the business.
This June, B2U secured a strategic supply agreement with autonomous vehicle company Waymo, which sees batteries retired from automotive use in Waymo’s fleet being installed into grid-scale BESS projects.
Moment Energy claims FEOC compliance and non-PFE status through third-party verification
EV-to-BESS battery specialist Moment Energy has announced that a third-party has verified its non-prohibited foreign entity (non-PFE) status and foreign entity of concern (FEOC) compliance for its new BESS.
Announced 9 September, Moment claimed the review was done by an unnamed top 10 US law firm and included scrutiny of the company’s corporate ownership, effective control, and debt financing structure.
This verification adds to the domestic manufacturing benefit Moment has previously used as a selling point for its product.
In May, Energy-Storage.news Premium spoke with Moment Energy’s CTO and co-founder Gabriel Soares, and VP of business development, Carl Mansfield. Mansfield said the US market will face a lack of products that can meet ITC compliance regulations through mid to late 2027.
He continued, “We’ve been pretty heavily involved in reviewing with expert and outside legal counsel what the actual (FEOC) guidance is.”
Moment claimed its BESS is integrated with FEOC-compliant power conversion systems (PCS), providing customers with a straightforward path toward a fully FEOC-compliant system.
The company is designing its North American supply chain to meet increasingly stringent material assistance cost ratio requirements through 2030 under the rules as currently defined and is committed to adapting as those requirements continue to evolve.
Further, in response to the guidance initially published by the US Treasury, Moment submitted formal comments and met with Treasury officials, sharing industry perspectives on the implementation and future development of new FEOC and PFE requirements.
May also saw Moment announcing a US$40 million Series B funding round to accelerate its battery factory. In 2025, the company’s second-life BESS manufacturing hub in Vancouver, British Columbia, Canada, reached full-scale production. The facility produces its Luna BESS, a 400kWh/1MWh system that can be scaled into 10MWh.
In November 2025, Moment launched a partnership with the strategic venture capital arm of Latin American energy leader Copec, in which Moment will deploy gigawatt-hours of second-life BESS projects across Latin America and Europe.
Rebaba raises US$4.6 million in oversubscribed seed round for second-life BESS
Swedish energy technology company Rebaba has raised SEK 44.1 million (US$4.6 million) for its circular BESS solution.
Announced 9 September, the US$4.6 million was raised through an oversubscribed seed round led by venture capital (VC) fund Sistafund, alongside pan-European initiative EIT Urban Mobility, with participation from existing shareholders and new European investors.
Rebaba combines EV batteries recovered from the market with its patent-pending technology. The company is coming off of one year of production at its flagship CircularHub in Stockholm, and now operates commercial deployments across Sweden.
Rebaba’s two BESS products, Companion, a compact 40kWh cabinet-based BESS for residential and smaller commercial applications, and Containerised, a larger-scale system for commercial and industrial (C&I) applications, enable customers to engage in load shifting, local generation storage, peak shaving, and grid balancing services.
Rebaba is now scaling operations to meet rising commercial demand, including fulfilling recently signed contracts in Sweden and Denmark that had not been previously disclosed.
The company said its plans include expansion of its CircularHub to a capacity of 40MWh/year, an amount that would avoid approximately 4,000 tonnes of CO2/year, as well as hiring across multiple roles.
To serve European markets more effectively and streamline logistics, Rebaba is working to establish additional manufacturing CircularHubs beyond Sweden.
The company’s expansion is backed by a growing distribution network that includes agreements with Swedish renewables company KP Energy, Scandinavian fuel and renewables company OKQ8, renewable technology company nanuq, which is active in Germany, Austria, and Switzerland, and French company Smartports, which transforms parking lots into solar, EV charging, and BESS hubs, alongside other major European partnerships that have been signed but not yet disclosed.
Facts Only
* B2U operates the 28MWh Bexar Martinez BESS project near San Antonio, Texas, using repurposed electric vehicle (EV) batteries.
* The Bexar Martinez project connects within CPS Energy’s service territory and uses B2U's patented second-life BESS cabinets.
* B2U has operated a 3MW/12MWh Cuyama BESS in California in November 2023, using Honda Clarity EV batteries.
* B2U's flagship 28MWh Sierra facility uses batteries from Nissan, Chevy, Tesla, and Ford.
* B2U projects qualify for the domestic content bonus under the Investment Tax Credit (ITC) and received third-party financing and acquisition by B2U Infrastructure Partners.
* Moment Energy's new BESS achieved third-party verification for non-PFE status and FEOC compliance via a review by an unnamed US law firm.
* Moment Energy is integrating FEOC-compliant power conversion systems (PCS).
* Moment Energy announced a US$40 million Series B funding round.
* Moment Energy's second-life BESS manufacturing hub in Vancouver, British Columbia, Canada, reached full-scale production in 2025.
* Rebaba raised US$4.6 million in a seed round led by Sistafund and EIT Urban Mobility.
* Rebaba’s products include Companion (40kWh) and Containerised BESS systems.
Executive Summary
Full Take
The narrative juxtaposes cutting-edge battery recycling and repurposing technologies with complex international regulatory compliance, particularly concerning US incentives like the ITC and evolving foreign entity rules like FEOC/PFE. The pattern emerges around leveraging material recovery—turning retired automotive batteries into grid storage—as a mechanism to secure financial advantages (financing, domestic content bonuses). This creates an attractive, self-reinforcing loop where environmental responsibility translates directly into investment viability for firms like B2U and Rebaba.
The tension lies in the operational reality versus the stated goals of compliance. Moment Energy’s focus on verifiable FEOC status suggests that geopolitical scrutiny—specifically around supply chain control and foreign ownership—is now a tangible, quantifiable risk that must be managed alongside technical efficiency. Furthermore, the expansion by Rebaba across Europe signals an attempt to create diversified operational footholds to mitigate regional regulatory fragmentation.
The implication for cognitive sovereignty is recognizing that technological innovation (second-life batteries) is not merely a product shift but a geopolitical and regulatory arbitrage opportunity. The successful navigation of this landscape requires understanding how specific legal frameworks—like the ITC or FEOC rules—are being applied, adapted, and influenced by private sector deployment. The missing piece is the long-term societal cost of relying on these novel supply chains versus established manufacturing norms, and who ultimately bears the burden of ensuring compliance across multiple jurisdictions.
Bridge Questions: What are the long-term consequences for domestic vs. international battery manufacturing footprints as incentives like the ITC continue to drive investment? How can regulatory bodies harmonize cross-border standards for critical material flow without stifling innovation? What is the systemic risk if the pursuit of efficiency through repurposing creates new, unmanageable compliance burdens for end-users and financiers?