The California High-Speed Rail Authority (Authority) is issuing this Request for Expressions of Interest (RFEI) to engage firms (Respondents) with expertise in clean energy generation, energy storage, grid integration, and related infrastructure delivery to support the development of behind-the-meter (BTM) clean energy and energy assets for the Authority’s traction power systems and related power needs. Traction power refers to the electricity required to operate the trains and the associated infrastructure for sourcing, delivering, and managing that power across the system. This RFEI seeks to identify market-ready solutions, commercial structures, and partnership models that can help the Authority deliver reliable, clean, and cost-effective power for rail operations and supporting facilities. Issuing this RFEI does not commence a procurement or obligate the Authority to initiate a procurement or award a contract. Expressions of Interest (EOIs) received from Respondents will not be scored or taken into consideration in any future procurement.