Peacefair Pzem-051 Manual _hot_ Jun 2026

Double‑check all connections for tightness and correct polarity before re‑applying power to the circuit.

| Specification | Details | | :--- | :--- | | | Peacefair | | Working Voltage | DC 6.5 ~ 100V | | Test Current (Rated) | 20A / 50A / 100A (Requires External Shunt) | | Measurement Accuracy | Class 1.0 | | Voltage Accuracy | ±1% | | Operating Temperature | -10°C to 60°C | | Dimensions (Main Body) | Approx. 89.6 x 49.6 x 24.4 mm | | Shunt Included (Typical) | 50A/75mV or 100A/75mV | | Energy Measurement Range | 0 ~ 9999kWh | | Power Measurement Range | 0 ~ 10kW |

The PZEM-051 features a 4-pin terminal block for the test circuit and a 2-pin terminal block for the external shunt connections. Standard Wiring (Power Source is 6.5V to 100V)

The PZEM-051 has an RS485 interface that allows for remote monitoring and data logging. The device can be connected to a computer or a monitoring system using a RS485-to-USB converter or a network gateway.

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| Feature | PZEM-051 | PZEM-061 | | :--- | :--- | :--- | | Measurement type | Shunt (direct) | CT (clamp) | | Max current | 100A (needs shunt) | 100A (clamp-on) | | Isolation | No (shunt is in circuit) | Yes (CT isolates) | | Best for | DC Solar / RV | AC Mains |

Note: Some models require you to short two specific pins on the back to reset. If the button hold doesn't work, check your specific revision.

Connects to the load-facing side of the external shunt resistor.

Press and hold the button until the display shows "Curr". Toggle: Short press to switch between "50A" and "100A". Standard Wiring (Power Source is 6

The shunt must be placed on the Negative (Ground) side of the circuit. Never put the shunt on the positive line.

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The back of the module features a 4-pin screw terminal block:

Typically between $11.00 and $19.00 USD , depending on the included shunt 0;42;. If the button hold doesn't work, check your

To help me tailor this information for your project, tell me:

0 – 10kW (

: Once configured, press and hold for 5 seconds to save and exit. Troubleshooting Common Issues Screen is completely blank Cause : Input voltage is below 6.5V or polarity is reversed.