B2U (“Battery 2nd Use”) Storage Solutions, Inc. was founded in 2019 in Los Angeles to develop, operate, and sell large-scale energy storage systems (ESS) using second-life EV batteries.

B2U's EV Pack Storage (EPS) system enables efficient reuse of EV battery packs without the need for remanufacturing, eliminating repurposing costs.

In this way, B2U’s solution significantly reduces both CAPEX and Levelized Cost of Storage (LCOS) of grid-scale energy storage systems.

B2U is currently operating a 27 MWh project in Lancaster (California). The project utilizes over 1,300 2nd life EV battery packs sourced from Honda and Nissan vehicles.

The SEPV Sierra hybrid (solar PV+BESS+grid charging) energy storage facility is interconnected directly to SCE's grid, selling power and grid services into the CAISO’s wholesale power market, generating over $1M in revenue in 2022 alone. This deployment represents the largest operational UL 9540 compliant ESS utilizing second-life EV batteries anywhere.

B2U’s business model to deploy EV batteries in second life applications in large scale ESS is well-suited to the challenges of EV battery reuse, where the available capacity of second life EV batteries is expanding rapidly and may exceed 200 GWh by 2030. B2U sells their system per kWh, in containerized solutions for microgrid and grid-scale applications.

B2U’s EPS technology has been developed to address the challenges of second life in large scale energy storage. EV battery packs are deployed in cabinet enclosures utilizing the pack’s existing battery management system, virtually eliminating repurposing costs.

The EPS system’s Cabinet Controllers connect and disconnect batteries wired in series and parallel strings during charge and discharge cycles so that weaker batteries with lower capacity do not limit the output of stronger batteries. This approach enables our system to achieve efficient energy yield despite the variance in capacity inherent in second life batteries.

The EPS system provides safe and reliable operation 24/7. In addition to being certified to UL 9540, the system continuously monitors and controls each battery to ensure operating specifications are maintained. EPS cabinet controllers and ancillary equipment sense and manage the internal cabinet environment surrounding each battery pack. To mitigate any potential hazards, battery packs are automatically disconnected if any component deviates from its operating specifications and design limits.

B2U's technology allows for the productive use of EV batteries in stationary energy storage applications when they are no longer suitable for transport applications; extracting significant value from them prior to their ultimate recycling.

B2U is currently targeting energy storage projects which are interconnected near loads, allowing them to provide electricity and grid services.