Current Sense
DC 3.5-30V 100A Voltmeter Amperemeter Blue + Red LED Ampere Dual Digital Voltmeter Meter Three Wire DC Ampere Voltmeter

2. If the current exceeds 10A, a shunt must be used to work, even if it is 0.1A, otherwise it will burn out.

4. Because the floating charge voltage of a 24V battery after being fully charged may exceed 30V, it is "not" recommended to use a 24V battery directly.
Size: 48*29*21mm
Supply voltage: DC3.5~30V (Note: The maximum input voltage cannot exceed 30V, otherwise it will burn out.)
Display mode: 0.28” LED, single or dual color: (Red-Red): Voltage and current are both red (Red-Blue): Voltage is red, current is blue.
Installation size: 45.5*26.5mm
Measurement rate: 500mS/time
Measurement accuracy: 1% (±2 digits)

Test terminal: three-wire terminal
COM (black line): test common terminal (COM is the common negative pole of the voltmeter and ammeter)
V+ (red wire): test positive voltage input
A+ (yellow line): Test positive current input. It can only be connected to the negative pole of the load and the negative pole of the load power supply, as shown below:
For "above 10A", a shunt is required:
Dimensions: 48x29x21mm
Operating temperature: -10 to +50 degrees
Power supply voltage: DC 3.5-30V
Accuracy grade: 1% +/- 2 digits
Model: YB27VA
Display Type: Numbers only

Test voltage: DC 3.5-30V
Test current: DC100A
Mounting hole: 45.5x26.5 mm
Features: Three lines