PZEM-017 DC Power & Energy Meter

Key Functions

• DC Voltage Measurement: Measures DC voltage from about 0.05 V up to 300 V.

• DC Current Measurement: Works with an external shunt resistor and supports currents from 0.02 A up to 300 A (depending on the chosen shunt).

• Active Power: Calculates real power (in watts).

• Energy Consumption (kWh): Tracks accumulated energy over time (up to 9999 kWh).

• Voltage Alarms: Allows setting high and low voltage thresholds for alarms to warn about unsafe levels.

Technical Specifications

• Voltage Range: ~0.05–300 V DC

• Current Range: ~0.02–300 A (external shunt dependent)

• Power Range: ~0.2–90 kW

• Energy Range: 0–9999 kWh

• Resolution: 0.01 V, 0.01 A, 0.1 W, 1 Wh

• Accuracy: Typically around ±1%

• Communication: RS-485 interface using Modbus RTU protocol (9600 baud) for digital data output and control.

• Operating Temp: ~-20 °C to +60 °C

• Dimensions: ~9 × 6 × 2.3 cm (varies by kit)

How It Works

The module reads DC voltage directly and measures current through an external shunt resistor. It then computes real-time power and accumulated energy values and makes them available over the RS-485/Modbus RTU interface for microcontrollers, computers, PLCs, or monitoring systems.

Typical Uses

• Solar power system monitoring

• Battery bank health & usage tracking

• Electric vehicle (EV) power systems

• Energy metering for DC appliances

• Industrial automation data logging

• IoT energy dashboards