Target Architecture

flowchart TD
    subgraph Site["Customer Site / Microgrid"]
        MG["Microgrid"]
        GW1["Gateway A\nOpenEMS Edge"]
        GW2["Gateway B\nOpenEMS Edge"]
        DEV["Devices\nMeters / ESS / Inverters / BMS"]
        MG --> GW1
        MG --> GW2
        GW1 --> DEV
        GW2 --> DEV
    end

    subgraph OpenEMS["OpenEMS Platform"]
        OEB["OpenEMS Backend"]
        META["Metadata\nEdge + user identity\nauthorization + state"]
        OTD["Backend Timedata\nInfluxDB"]
        OUI["OpenEMS UI\nOps / engineering"]
        OEB --> META
        OEB --> OTD
        OUI --> OEB
    end

    subgraph NFE["NFE Product Platform"]
        API["NFE App Backend / API"]
        PG["Postgres\nCustomers / tenants / tariffs /\ninvoices / permissions"]
        JOBS["Usage + billing jobs"]
        DERIVED["Derived usage tables /\ncustomer summaries / billing outputs"]
        WEB["Customer Web App"]
        ADMIN["NFE Admin App"]
        WEB --> API
        ADMIN --> API
        API --> PG
        API --> DERIVED
        JOBS --> PG
        JOBS --> DERIVED
    end

    GW1 --> OEB
    GW2 --> OEB
    API --> OEB
    API --> OTD
    JOBS --> OTD