Once powered, the LCD cycles through parameters. The manual notes that a short press of the button behind the unit (or on the front, depending on the revision) toggles between displays.
: Built-in toggle for high visibility or power saving. peacefair pzem-051 manual
The PZEM-051 is widely available from retailers like AliExpress 0;62a; and eBay 0;17;. Once powered, the LCD cycles through parameters
Long press the button until "" appears in the power display area0;7c5; 0;92d;. The PZEM-051 is widely available from retailers like
The is a 4-in-1 digital DC power monitor designed to measure voltage, current, active power, and energy consumption simultaneously on a large LCD screen. Typically used for solar systems, battery monitoring, and electric vehicles, it is rated for DC 6.5V to 100V and up to 100A (with an external shunt). Technical Specifications
: The physical print included in the box is notoriously tiny and difficult to read without a magnifier.