Before installation, verify the ratings of your specific unit (usually printed on the side of the blue transformer or the module housing).
| Parameter | Range | Resolution | Accuracy | | :--- | :--- | :--- | :--- | | Voltage | AC 80V – 260V | 0.1V | ±0.5% | | Current | 0 – 100A | 0.01A (0-10A), 0.1A (10-100A) | ±0.5% | | Active Power | 0 – 20kW | 0.1W – 10W | ±0.5% | | Energy | 0 – 9999.9kWh | 0.001kWh – 1kWh | ±0.5% | | Operating Frequency | 45Hz – 65Hz | 0.1Hz | | | Data Interface | TTL Serial (RS485 on some variants) | | | peacefair pzem-051 manual
Unlike its popular cousin (the PZEM-061) which uses a split-core current transformer (CT), the PZEM-051 is typically designed for DC circuits or high-current AC systems using a shunt (external resistor). It measures Voltage (V), Current (A), Power (W), and Energy (kWh/Wh) with a backlit LCD. Before installation, verify the ratings of your specific
Key Specifications (from manual):
Many users accidentally buy the wrong model. Ensure you have the DC version. peacefair pzem-051 manual
| Feature | PZEM-051 (THIS ARTICLE) | PZEM-061 | | :--- | :--- | :--- | | Current Type | Direct Current (DC) | Alternating Current (AC) | | Shunt Type | External 75mV Shunt | Built-in CT (Current Transformer) | | Max Voltage | 100V DC | 230V / 110V AC | | Best for | Solar/Battery | Home Mains |