{
  "node": {
    "id": "term:energy-management-system",
    "type": "Term",
    "label": "Energy management system",
    "properties": {
      "id": "energy-management-system",
      "name": "Energy management system",
      "abbr": "EMS",
      "section": "topic-pack",
      "definition": "The site-level controller of a storage system that decides when to charge and discharge according to prices, grid signals and the battery’s limits, and dispatches those commands to the BMS and inverters.",
      "related": [
        "bms",
        "inverter",
        "stationary-storage",
        "modbus",
        "energy-arbitrage"
      ],
      "url": "https://lemonergy.com/learn/glossary/energy-management-system/",
      "mentions": []
    }
  },
  "edges": [
    {
      "id": "edge:72",
      "source": "term:energy-management-system",
      "target": "workflow:depot-allocation",
      "type": "usedIn",
      "properties": {
        "sourceFile": "wiki-blocks.json"
      }
    },
    {
      "id": "edge:3079",
      "source": "term:energy-management-system",
      "target": "topic:topic-pack",
      "type": "belongsTo",
      "properties": {
        "sourceFile": "terms.json"
      }
    },
    {
      "id": "edge:3080",
      "source": "term:energy-management-system",
      "target": "term:bms",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3081",
      "source": "term:energy-management-system",
      "target": "term:inverter",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3082",
      "source": "term:energy-management-system",
      "target": "term:stationary-storage",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3083",
      "source": "term:energy-management-system",
      "target": "term:modbus",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    },
    {
      "id": "edge:3084",
      "source": "term:energy-management-system",
      "target": "term:energy-arbitrage",
      "type": "relatedTo",
      "properties": {
        "sourceFile": "terms.json",
        "meaning": "Related context; not a causal claim"
      }
    }
  ],
  "neighbors": [
    {
      "id": "workflow:depot-allocation",
      "type": "Workflow",
      "label": "Share a site supply",
      "properties": {
        "id": "depot-allocation",
        "title": "Share a site supply",
        "kind": "studio",
        "summary": "Multiple branches share one power cap.",
        "steps": [
          "Compare proportional and input-priority allocation.",
          "Lower the cap at fixed departure times."
        ],
        "example": "Three vehicles requesting 11 kW each under a 22 kW cap initially receive 7.33 kW each with proportional allocation.",
        "observe": "The site cap can hold while a vehicle misses its target.",
        "limits": "Downstream unused capacity is not silently redistributed.",
        "url": "https://design.lemonergy.com/cosim.html?example=charging-depot",
        "label": "Open the Studio example",
        "evidence": [
          "js/charging-control.js",
          "js/charging-scenarios.js",
          "docs/CHARGING_BLOCKS_SPEC.md"
        ]
      }
    },
    {
      "id": "topic:topic-pack",
      "type": "Topic",
      "label": "Modules, packs and battery management",
      "properties": {
        "id": "topic-pack",
        "name": "Modules, packs and battery management",
        "lede": "From a single cell to a working battery system, and the electronics that keep it safe.",
        "context": "Make series/parallel architecture explicit.",
        "example": "Twelve 3.6 V, 5 Ah cells in 6s2p give 21.6 V, 10 Ah and 216 Wh nominally before other restrictions.",
        "lesson_url": "https://lemonergy.com/learn/fundamentals/cell-architecture/",
        "lesson_label": "Open cell architecture"
      }
    },
    {
      "id": "term:bms",
      "type": "Term",
      "label": "Battery management system",
      "properties": {
        "id": "bms",
        "name": "Battery management system",
        "abbr": "BMS",
        "section": "topic-pack",
        "definition": "The electronics and software that keep a battery inside its safe window: measuring every cell voltage and many temperatures, estimating SOC and SOH, balancing cells, computing current limits, controlling the contactors and reporting over the vehicle network.",
        "related": [
          "state-of-charge",
          "cell-balancing",
          "state-of-power",
          "cell-supervision-circuit",
          "contactor",
          "can-bus"
        ],
        "lesson": "fundamentals/battery-basics/#cell-module-pack",
        "url": "https://lemonergy.com/learn/glossary/bms/",
        "mentions": [
          "state-of-health",
          "cell-voltage"
        ]
      }
    },
    {
      "id": "term:inverter",
      "type": "Term",
      "label": "Inverter",
      "properties": {
        "id": "inverter",
        "name": "Inverter",
        "aka": [
          "power conversion system",
          "PCS"
        ],
        "section": "topic-pack",
        "definition": "The power electronics that turn the battery’s DC into AC for a motor or the grid, and back again for charging. In stationary storage it is called the power conversion system and its rating in kW or MW sets the system’s power independently of the battery’s energy.",
        "related": [
          "pre-charge",
          "dc-dc-converter",
          "stationary-storage",
          "energy-management-system",
          "direct-current",
          "iec-62477-1"
        ],
        "url": "https://lemonergy.com/learn/glossary/inverter/",
        "mentions": []
      }
    },
    {
      "id": "term:stationary-storage",
      "type": "Term",
      "label": "Stationary storage",
      "properties": {
        "id": "stationary-storage",
        "name": "Stationary storage",
        "abbr": "BESS",
        "aka": [
          "battery energy storage system",
          "ESS"
        ],
        "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",
          "energy-management-system",
          "inverter",
          "energy-arbitrage",
          "long-duration-storage",
          "ul-9540a"
        ],
        "url": "https://lemonergy.com/learn/glossary/stationary-storage/",
        "mentions": []
      }
    },
    {
      "id": "term:modbus",
      "type": "Term",
      "label": "Modbus",
      "properties": {
        "id": "modbus",
        "name": "Modbus",
        "section": "topic-pack",
        "definition": "A simple industrial register-based protocol, over serial RS-485 or TCP, that stationary storage systems use between battery, inverter and site controller. It is old, open and universally supported, which is why it survives in grid equipment.",
        "related": [
          "can-bus",
          "energy-management-system",
          "stationary-storage",
          "inverter"
        ],
        "url": "https://lemonergy.com/learn/glossary/modbus/",
        "mentions": [
          "power-plant-controller"
        ]
      }
    },
    {
      "id": "term:energy-arbitrage",
      "type": "Term",
      "label": "Energy arbitrage",
      "properties": {
        "id": "energy-arbitrage",
        "name": "Energy arbitrage",
        "aka": [
          "peak shaving",
          "load shifting"
        ],
        "section": "topic-applications",
        "definition": "Charging a battery when electricity is cheap and discharging when it is expensive, the simplest revenue of grid storage. Peak shaving is the same idea applied to a site’s demand charges.",
        "related": [
          "stationary-storage",
          "energy-management-system",
          "frequency-regulation",
          "levelized-cost-of-storage"
        ],
        "url": "https://lemonergy.com/learn/glossary/energy-arbitrage/",
        "mentions": []
      }
    }
  ]
}