eMabler OCPP 1.6 Simulator Chargers

Overview

The eMabler OCPP 1.6 Simulator Charger is a software-based charging station emulator that behaves like a real EV charger and communicates with a backend system using WebSocket and OCPP 1.6 JSON.

The simulator is designed for:

• Backend integration testing

• Customer onboarding and validation

• QA and regression testing

• Smart charging validation

• Demonstrations and staging environments

The simulator supports both AC and DC chargers and provides real-time UI-driven state simulation.

Scope

What the Simulator Is

• A controllable OCPP 1.6 charging station emulator

• A UI-driven testing tool for simulating real charging sessions

• A way to validate backend command handling and transaction flows

What the Simulator Is Not

• Not a physical charger

• Not suitable for hardware validation or certification testing

• Not a replacement for field testing

OCPP 1.6 Supported Features

Charger-Initiated Messages (Simulator → Backend)

Backend-Initiated Messages (Backend → Simulator)

Charger Configuration

Supported Charger Types

• AC Chargers

  • Single-phase

  • Three-phase

• DC Chargers

  • With DC ramp-up simulation

Configurable Parameters

UI and Charger States

The simulator UI reflects real-time OCPP state transitions.

State Flow

Offline

• Charger is not connected

• Status: Unknown

Connected

• WebSocket connected

• Charger registered or ready

Available

• Connector ready for charging

Preparing

• Cable plugged in

• Awaiting authorization

Authorization

• RFID/IdTag entered

• Authorize message sent

Charging

• Transaction started

• Meter values being sent

• Transaction ID displayed

Finishing

• Transaction stopped

• Awaiting unplug

Available

• Cable unplugged

• Connector ready

Summary of Connector Actions

Each connector supports the following actions:

Meter Value Reporting

AC Charger Metrics

• Current (L1, L2, L3)

• Voltage (L1-N, L2-N, L3-N)

• Power Active Import

• Energy Active Import Register

DC Charger Metrics

• DC Current

• DC Voltage

• DC Power

• Energy Active Import Register

Smart Charging Support

Supported Profiles

• TxDefaultProfile

• TxProfile (Absolute Schedule)

• TxProfile (Recurring Schedule)

Features

• Multiple schedule periods

• Current limits per period

• Phase control

• Profile stacking support

Automation Features

Auto Stop Conditions

• Maximum consumption limit (default 100 kWh)

• Remote stop command

Connection Management

WebSocket Capabilities

• OCPP 1.6 subprotocol support

• Automatic reconnection (exponential backoff, up to 6 retries)

• Keep-alive interval (120 seconds)

• Offline message queuing (meter values)

Connection States

• Connected

• Offline

Customer Use Cases

Backend Integration Testing

• Validate boot flow

• Validate transaction lifecycle

• Validate authorization handling

Remote Command Testing

• RemoteStartTransaction

• RemoteStopTransaction

• Reset and availability changes

Smart Charging Validation

• Apply and validate charging profiles

QA and Regression Testing

• Suspend/resume flows

• Unplug during charging

• Offline and reconnect scenarios

Limitations

• Meter values are simulated

• No hardware-level validation

• No physical EVSE component simulation

• Vendor-specific OCPP extensions not included unless configured

Access and Provisioning

Simulator chargers are provisioned by eMabler upon request.

Once provisioned, customers can:

• Connect to their backend using WebSocket endpoint

• Configure charger parameters

• Simulate charging sessions

• Test backend command handling