⚡ Energy & Utilities · C4 Architecture · Pro
Utility EV Charging Network Architecture
How a power utility runs a public EV charging network: chargers, a charge-point management system, grid load control and billing.
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Drawing diagram…
What this diagram shows
- Chargers talk OCPP to a central charge-point management system
- Load management caps charging when the local feeder is stressed
- Sessions are billed to app wallets or roaming partners
Prompt used
A utility-run EV charging network: drivers use a mobile app to find and start chargers. Chargers connect over OCPP to a charge point management system (CPMS). A load management service reads feeder load from the utility SCADA/ADMS and limits charging power at busy times. Sessions go to a billing service with wallet payments via a payment gateway, and roaming sessions are exchanged with other networks over OCPI.
Mermaid code
C4Container
title Utility EV Charging Network
Person(driver, "EV Driver", "Finds and pays for charging")
System_Ext(scada, "Grid SCADA / ADMS", "Feeder load and limits")
System_Ext(pay, "Payment Gateway", "Cards and UPI")
System_Ext(roam, "Roaming Partners", "OCPI hubs")
System_Boundary(ev, "Charging Network Platform") {
Container(app, "Driver App", "Flutter", "Find, start, pay")
Container(cpms, "Charge Point Management", "Java", "OCPP 1.6/2.0.1 server")
Container(load, "Load Management", "Python", "Dynamic power limits")
Container(bill, "Billing Service", "Node.js", "Sessions, tariffs, wallets")
ContainerDb(db, "Sessions DB", "PostgreSQL", "Chargers and sessions")
}
Rel(driver, app, "Uses")
Rel(app, cpms, "Start/stop session", "HTTPS")
Rel(cpms, db, "Stores sessions")
Rel(scada, load, "Feeder load")
Rel(load, cpms, "Sets charging limits")
Rel(cpms, bill, "Completed sessions")
Rel(bill, pay, "Charges")
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