Features:
1.Use high-quality materials with guaranteed quality
2.Small size and exquisite appearance
3.Easy to use
4.Stable performance
5.Wide application range

Parameters:
MPPT is 18V: input DC 18-28V, output DC 1.2-17V adjustable (3.6V 4.2V 4.3V 4.35V 8.4V 12.6V 16.8V)
MPPT is 12V: input DC 12-28V, output DC 1.2-11V adjustable (3.6V 4.2V 4.3V 4.35V 8.4V)
MPPT is 9V: input DC 9-28V, output DC 1.2-8V adjustable (3.6V 4.2V 4.3V 4.35V 7.2V)
MPPT disable (change R5 to 12K Ω):
Input DC 7-28V, output DC 1.2-21V adjustable (3.6V 4.2V 4.3V 8.4V 12.6V 16.8V 21V)
The maximum charging current/output current is 1A, but you can change the current by changing the value of the Rcs resistor
Can be used as a voltage source without batteries
Automatic adjustment of deep discharge batteries
Automatic charging
Led indicator light: "CR" Led is the charging status indicator light
Battery overvoltage protection
Working environment temperature -40 ℃ to+85 ℃
Size: 45 x 20 x 15mm
Weight: 7.3 grams

Package included:
MPPT Solar Charge Controller Board*1