# 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`.