Specification for Acceptance of User-Side Electrochemical Energy Storage System Connected to Power Grid

This standard, NB/T 33015-2025, replaces the 2014 version and specifies the acceptance process for user-side electrochemical energy storage systems connected to the power grid. It covers acceptance preparation, document review, on-site verification, and acceptance report requirements. Applicable to systems using lithium-ion, sodium-ion, lead-acid (carbon), and flow batteries, newly built, modified, or expanded within power users' internal grids. The standard includes checklists for document review and on-site verification in annexes. It aims to ensure safe and reliable grid connection of these energy storage systems, supporting the integration of renewable energy and enhancing grid stability.