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The Peacefair PZEM-004T AC Multi-Function Energy Metering Power Monitor Module is a robust, industrial-grade data acquisition board designed to quantify and stream critical electrical parameters across standard single-phase mains grids. Operating on a wide input matrix from 80V to 260V AC, this specialized sensor board accurately calculates real-time electrical data without requiring expensive, space-consuming panel instruments. The system uses a dedicated on-board microprocessor paired with an external non-invasive Current Transformer (CT) coil, allowing safe telemetry capture up to 100A without slicing into high-voltage load lines.

The module is driven by a serial communication engine running over Modbus-RTU style framing via a 5V TTL UART interface. It tracks six primary variables concurrently: AC RMS voltage, AC current load, active power (wattage), total accumulated energy (kWh), frequency, and grid power factor. High galvanic optocoupler isolation separates the high-voltage AC mains logic from your low-voltage microcontroller logic (such as an Arduino, NodeMCU, or ESP32), providing physical protection for developers and sensitive hardware backbones alike.

Key Features and Benefits

• Comprehensive 6-in-1 Electrical Telemetry: Measures and updates voltage, current, active power, total energy, system frequency, and power factor simultaneously over the serial bus.

• Galvanic Optocoupler Isolation: Isolates the high-voltage AC sense terminals from the low-voltage 5V logic headers, keeping microcontrollers safe from high-voltage transients.

• Non-Volatile Flash Power-Down Memory: Features built-in data storage that automatically retains total accumulated active energy data ($ ext{kWh}$) during power failures.

• Modbus-RTU Style Communication Protocol: Employs standard hardware serial commands with a stable 9600 baud rate, allowing up to 247 modules to be chained together on custom address buses.

• Programmable Over-Power Threshold Alarm: Features software-configured active power alarm boundaries. The module flags an alert byte if connected loads exceed user-defined safety parameters.

Technical Specifications

How to Use

1. High-Voltage AC Supply Wiring: Connect your mains AC Phase (Live) to terminal L and the AC Neutral line to terminal N on the module's screw terminal side. This powers the module's high-voltage sensing block.

2. Current Transformer Installation: Connect the two leads from the provided Current Transformer (CT) coil to the CT+ and CT- terminals. Clamp the CT ring around only one of the primary lines (preferably the Live/Phase wire) feeding your target electrical appliance.

3. Microcontroller Logic Hookup: Pin your logic headers to a microcontroller. Wire VCC to +5V DC, GND to common logic ground, RX to your MCU's hardware or software serial TX pin, and TX to the MCU's RX pin.

4. Software Environment Setup: Open your Arduino IDE, search the library manager for PZEM-004T-v30, and download the official library installer.

5. Execution & Data Pull: Flash the provided PZEM004Tv30Demo sketch. Open the Serial Monitor window at 115200 baud to view real-time calculations for voltage, current, active power, and grid frequency.

Applications

• Smart Home Automation & IoT Meters: Pairs with ESP8266 or ESP32 development boards to export power metrics directly to Home Assistant dashboards via MQTT.

• Industrial Load Logging Panels: Monitors machines inside workshop distribution boxes to detect motor wear or uncharacteristic overcurrent situations.

• Solar Photovoltaic Inverter Tracking: Measures real-time AC energy generation from renewable solar inverters before feeding it back into the local home breaker network.

• EV Charging Station Sub-Metering: Provides cost tracking and power distribution analysis for electric vehicle charging setups.

Package Includes

• 1 x Peacefair PZEM-004T AC Multi-Function Power Monitor Module

• 1 x 100A Non-Invasive Split-Core/Closed-Loop Current Transformer (CT) Coil

Shipping & Delivery

• Free shipping on orders above ₹999 across India

• Dispatched within 1-3 business days

• Expected delivery: 3-7 business days depending on location

• Secure packaging to ensure safe transit of electronic components