{
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    "id": "term:en-62040-1",
    "type": "Term",
    "label": "EN 62040-1",
    "properties": {
      "id": "en-62040-1",
      "name": "EN 62040-1",
      "aka": [
        "IEC 62040-1",
        "UPS safety standard"
      ],
      "section": "topic-standards-stationary",
      "definition": "The European adoption of IEC 62040-1, the safety standard for uninterruptible power systems with an AC output and an energy storage device — usually a battery behind a DC link — on low-voltage networks up to 1 000 V AC or 1 500 V DC. The battery room or cabinet itself also falls under IEC 62485-2.",
      "related": [
        "lead-acid",
        "vrla",
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        "stationary-storage",
        "ieee-485"
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      "url": "https://lemonergy.com/learn/glossary/en-62040-1/",
      "mentions": []
    }
  },
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      "id": "edge:6474",
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        "sourceFile": "terms.json",
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      "id": "topic:topic-standards-stationary",
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      "label": "Stationary, industrial and product standards",
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        "name": "Stationary, industrial and product standards",
        "lede": "Safety and performance standards for portable, industrial and grid batteries, their electronics and their installation.",
        "context": "Match scope to product and installation.",
        "example": "A cell-level test does not establish fire performance or commissioning requirements for a complete installation.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/battery-basics/",
        "lesson_label": "Open battery basics"
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      "id": "term:lead-acid",
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      "id": "term:vrla",
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      "label": "Valve-regulated lead–acid",
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          "gel battery"
        ],
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        "definition": "A lead–acid battery whose electrolyte is immobilised in glass-fibre mats (AGM) or a gel, with a pressure valve instead of open vents, so it can be used in any orientation without maintenance. It recombines the gases of overcharge internally.",
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      "id": "term:iec-62485",
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        "definition": "The installation standard for secondary batteries and battery installations: ventilation, protection against electric shock, and the layout of battery rooms. Part 2 covers stationary batteries, part 3 traction batteries for industrial trucks.",
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      "id": "term:stationary-storage",
      "type": "Term",
      "label": "Stationary storage",
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        "id": "stationary-storage",
        "name": "Stationary storage",
        "abbr": "BESS",
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          "ESS"
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        "section": "topic-applications",
        "definition": "Batteries installed in a fixed place — a container at a solar farm, a cabinet in a home — to shift energy in time or support the grid. LFP cells dominate because cost per cycle and safety matter more than mass.",
        "related": [
          "lfp",
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        "mentions": []
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    {
      "id": "term:ieee-485",
      "type": "Term",
      "label": "IEEE 485",
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        "name": "IEEE 485",
        "section": "topic-standards-stationary",
        "definition": "IEEE’s recommended practice for sizing stationary lead–acid batteries in float service: define the DC load as a duty cycle of currents over time, then choose the cell size and number that will carry it, with allowances for temperature, ageing and design margin. Charger sizing and other chemistries are outside its scope; the current revision dates from 2020.",
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}