This is the most common task.
Note: Power cycling (turning off the battery) does not reset energy. The device has internal EEPROM memory. You must use the button.
If you own a PZEM-051, keep the small paper manual that came with it – Peacefair’s model numbers and pinouts sometimes differ between production batches. For the most accurate wiring, locate the printed label on the shunt itself: it will state “100A 75mV”. Always connect the meter’s auxiliary power first before connecting the high-current circuit.
For official support or an exact PDF manual, contact Peacefair via their Alibaba store or the reseller where you purchased the unit. The PZEM-051 is widely cloned, so be sure your seller provides authentic documentation.
Peacefair PZEM-051 is a DC digital multi-function meter designed to measure and display voltage, current, active power, and energy simultaneously on a large LCD screen. en.peacefair.cn Core Specifications Voltage Range: 6.5–100V DC. Current Range: Typically used with a 50A or 100A external shunt. Functions:
Electrical parameter measurement, voltage alarm, energy reset, data storage during power-off, and backlight control. en.peacefair.cn Operating Instructions 1. Energy Reset (CLr) If you need to clear the accumulated energy value (kWh): Enter Reset Mode: Long press the key for until "CLr" appears and flashes in the energy display area. Confirm Clear: peacefair pzem-051 manual
Short press the key once while it is flashing to reset the value to zero and exit. If you do not press anything for
, the meter will exit the reset state without clearing the data. 2. Voltage Alarm Threshold Setting (SET)
You can set high and low voltage limits that will cause the backlight to flash if exceeded: РКС Компоненти - РАДІОМАГ Enter Setting Mode: Long press the key until the screen displays , then release. Adjust Values:
The voltage area shows the high alarm value; the current area shows the low alarm value. Short press the key to increment the flashing digit by 1. Stop pressing for to automatically switch to the next digit. Save and Exit: Long press the key until the screen displays
. The settings are now saved, and the meter returns to the normal display. РКС Компоненти - РАДІОМАГ 3. Backlight Control short press This is the most common task
of the key will turn the backlight on or off. The state (on or off) is saved even if the power is disconnected. РКС Компоненти - РАДІОМАГ Wiring and Safety Indoor Use Only:
This module is not waterproof and should not be used outdoors.
Ensure correct DC polarity; reversing the input may damage the meter. Shunt Connection:
The external shunt must be connected correctly to the "Current" terminals to measure high amperage safely. en.peacefair.cn
For further technical details, you can find the original documentation at Peacefair's official site or community-hosted guides like the PZEM-051 Instruction Manual for connecting the shunt and battery? Note: Power cycling (turning off the battery) does
Looking at the back of the LCD, you will see terminal numbers 1 through 4.
Always confirm labels on your board; manufacturers vary.
Here are common issues described in the official documentation and how to fix them.
When you purchase a Peacefair PZEM-051, the package typically includes: