{
  "case_id": "SE-BESS-SODIUM-001",
  "version": "0.1",
  "title": "Sodium-Ion Energy Storage Commercialization State Map",
  "scope": "Stationary battery energy storage systems only; vehicle, starter-battery, and solid-state battery claims are excluded.",
  "decision_question": "Has sodium-ion stationary storage crossed from product and production claims into a procurable, delivered, commissioned technology with public field-operating evidence?",
  "knowledge_cutoff": "2026-09-24",
  "current_state": {
    "product_announced": "SUPPORTED",
    "supply_cooperation_agreement": "SUPPORTED",
    "production_readiness": "VERIFICATION_REQUIRED",
    "customer_batch_delivery": "NOT_ESTABLISHED",
    "named_commissioned_site": "NOT_ESTABLISHED",
    "independent_field_performance": "NOT_ESTABLISHED",
    "long_operating_history": "UNKNOWN",
    "lifecycle_cost_advantage_over_lfp": "NOT_ESTABLISHED",
    "universal_lfp_replacement": "NOT_ESTABLISHED"
  },
  "records": [
    {
      "record_id": "SE-BESS-SODIUM-001-EV-001",
      "event_date": "2021-07-29",
      "knowledge_date": "2026-09-24",
      "publisher": "CATL",
      "source_type": "manufacturer announcement",
      "url": "https://www.catl.com/en/news/665.html",
      "accepted_support": "Sodium-ion technology and a planned industrial-chain target were publicly announced.",
      "does_not_support": "Stationary BESS customer delivery, commissioning, or field-operating history."
    },
    {
      "record_id": "SE-BESS-SODIUM-001-EV-002",
      "event_date": "2025-04-21",
      "knowledge_date": "2026-09-24",
      "publisher": "CATL",
      "source_type": "manufacturer product launch",
      "url": "https://www.catl.com/en/news/6401.html",
      "accepted_support": "Naxtra sodium-ion products were publicly launched with manufacturer-attributed mass-production claims.",
      "does_not_support": "A delivered or commissioned stationary storage system."
    },
    {
      "record_id": "SE-BESS-SODIUM-001-EV-003",
      "event_date": "2026-04-27",
      "knowledge_date": "2026-09-24",
      "publisher": "CATL and HyperStrong",
      "source_type": "manufacturer and counterparty announcements",
      "url": "https://www.catl.com/en/news/6812.html",
      "corroborating_url": "https://www.hyperstrong.com/en/news/company-news/95",
      "accepted_support": "Two counterparties publicly described a three-year 60 GWh sodium-ion energy-storage cooperation agreement.",
      "does_not_support": "Shipment, customer acceptance, commissioning, grid connection, or operating performance."
    },
    {
      "record_id": "SE-BESS-SODIUM-001-EV-004",
      "event_date": "2026-06-22",
      "knowledge_date": "2026-09-24",
      "publisher": "CATL",
      "source_type": "manufacturer product launch",
      "url": "https://www.catl.com/en/news/6861.html",
      "accepted_support": "TENER Sodium was publicly launched as a stationary BESS product and future delivery milestones were stated.",
      "does_not_support": "Completed customer delivery or a named commissioned customer site as of the knowledge cutoff. The phrase field-validated remains source-attributed."
    },
    {
      "record_id": "SE-BESS-SODIUM-001-EV-005",
      "event_date": "2026-08-25",
      "knowledge_date": "2026-09-24",
      "publisher": "CATL",
      "source_type": "manufacturer event announcement",
      "url": "https://www.catl.com/en/news/6977.html",
      "accepted_support": "TENER Sodium was publicly showcased and a Brazil market partnership was announced.",
      "does_not_support": "A named commissioned sodium-ion BESS or public field-performance dataset."
    }
  ],
  "next_transition_evidence": [
    "Named customer shipment and acceptance record",
    "Named site commissioning or grid-connection record",
    "Dated operating history tied to that system",
    "Independent performance or safety validation",
    "Repeat procurement or multi-operator replication"
  ],
  "update_rule": "New evidence is appended with event time and knowledge time. A state changes only when the new record meets the stated threshold; previous records remain visible and may be superseded, not overwritten."
}