OCPP 1.6j Meter Values#

Overview#

This document outlines the available meter values from amina charging stations under OCPP 1.6j.

Available Meter Values#

1. Voltage Measurements#

Measurand: Voltage
Unit: V (Volts)
Purpose: Monitor grid voltage stability and quality

Phase

Description

Typical Range

L1

Phase 1 Voltage

220-240V (EU)

L2

Phase 2 Voltage

220-240V (EU)

L3

Phase 3 Voltage

220-240V (EU)

Note: Phase value is ‘0’ when phase is not connected

2. Current Measurements#

Measurand: Current.Import
Unit: A (Amperes)
Purpose: Monitor actual current draw during charging sessions

Phase

Description

Typical Range

L1

Phase 1 Current

6-32A

L2

Phase 2 Current

6-32A

L3

Phase 3 Current

6-32A

N

Neutral Current

-

3. Power Factor#

Measurand: Power.Factor
Unit: None (dimensionless, -1.0 to +1.0)
Purpose: Monitor power quality and grid efficiency

Phase

Description

Optimal Range

L1

Phase 1 Power Factor

0.95 to 1.0 (leading/lagging)

L2

Phase 2 Power Factor

0.95 to 1.0 (leading/lagging)

L3

Phase 3 Power Factor

0.95 to 1.0 (leading/lagging)

4. Active Power Import#

Measurand: Power.Active.Import
Unit: W (Watts)
Purpose: Real-time power consumption monitoring

Measurement

Description

Typical Range

L1

Phase 1 Active Power

0-7.4kW (32A @ 230V)

L2

Phase 2 Active Power

0-7.4kW (32A @ 230V)

L3

Phase 3 Active Power

0-7.4kW (32A @ 230V)

Total

Combined Power

0-22kW (three-phase)

5. Frequency#

Measurand: Frequency
Unit: None (Hz implied, OCPP 1.6j limitation)
Purpose: Grid frequency monitoring

Phase

Description

Normal Range

L1

Phase 1 Frequency

49.5-50.5Hz (EU)

L2

Phase 2 Frequency

49.5-50.5Hz (EU)

L3

Phase 3 Frequency

49.5-50.5Hz (EU)

6. Energy Register#

Measurand: Energy.Active.Import.Register
Unit: Wh (Watt-hours)
Purpose: Cumulative energy consumption tracking

Type

Description

Reset Behavior

Total

Cumulative Energy Imported

Manual reset or rollover at max value

CSMS Configuration and Monitoring#

Note: The measurement circutry within the charger is calibrated to measure currents appropriate to charging cars. When very little current is drawn (close to 0A), the measurements you receive will mostly consist of noise (and may be negative).

This does not affect cumulative measurements, as the noise has a mean of 0. This only applies to paused charging sessions, or if you have configured Cst_MeterValuesInTxOnly to value false.