{
  "ref_no": "UL 9540:2023",
  "slug": "ul-9540",
  "title": "Standard for energy storage systems and equipment",
  "status": "版本更新",
  "effective_on": "2023-06-28",
  "scope": "Stationary and mobile energy storage systems",
  "key_requirements": "System-level safety; used with UL 9540A data for fire authority approval",
  "languages": [
    "EN"
  ],
  "market": {
    "iso": "US",
    "name": "United States"
  },
  "events": [
    {
      "on": "2023-06-28",
      "note": "Third edition published",
      "source_url": "https://www.shopulstandards.com/ProductDetail.aspx?productId=UL9540"
    },
    {
      "on": "2020-02-01",
      "note": "Second edition published",
      "source_url": "https://www.shopulstandards.com/ProductDetail.aspx?productId=UL9540"
    }
  ],
  "source_url": "https://www.shopulstandards.com/ProductDetail.aspx?productId=UL9540",
  "verified_at": "2026-08-19",
  "version": 1,
  "urls": {
    "html": "/en/regulations/ul-9540",
    "markdown": "/en/regulations/ul-9540.md"
  }
}