Peacefair Pzem-051 Manual Today

Peacefair PZEM-051 User Guide & Manual

1. Introduction

The Peacefair PZEM-051 is a popular, low-cost AC digital multifunction meter designed for single-phase systems. It is widely used in DIY electronics, solar monitoring, and industrial control panels to measure voltage, current, power, and energy consumption.

| Data | Register Address | Data Type | | :--- | :--- | :--- | | Voltage | 0x0000 | Unsigned Int (x 0.1V) | | Current | 0x0001 | Unsigned Int (x 0.01A) | | Power | 0x0002 | Unsigned Int (x 0.1W) | | Energy | 0x0004 | Unsigned Int (x 1Wh) |

• Battery (+) → Load (+) → Meter’s thick red (V sense)
• Battery (-) → Shunt (large terminal A)
• Shunt (large terminal B) → Load (-)
• Shunt (small terminals) → Meter’s thin current sense wires

1. Voltage (V) – DC voltage of the system.
2. Current (A) – DC current passing through the shunt.
3. Power (W) – Instantaneous power (Volts × Amps).
4. Energy (kWh) – Total accumulated energy used.

Warning: Do not exceed 100V DC. Exposing the meter to 110V or 220V DC will instantly destroy the device and may cause a fire.

Conclusion

Current Shunt: The shunt must be connected in series with the negative line to the load.