Features: * brand new and high quality *Made of high quality material, durable and practical to use *This 30A 20A 10A PWM Solar Charge Controller is suitable for 12V 24V lead acid battery,Lithium-ion battery(3 strings of 11.1V lithium batteries);Lithium iron phosphate batteries(4 string of 12.8V). *Build-in industrial micro controller. *Big LCD display,all adjustable parameter. *Fully 3-stage PWM charge management. Specifications: Model Name RBL-10A-Li RBL-20A-Li RBL-30A-Li Charge Current 10A 20A 30A Discharge Current 10A 10A 10A Max Solar Input 12V battery, the highest is 23V 24V battery , The highest is 46V Battery type B1 =Lead acid battery 12V/24Vauto B2=Lithium-ion battery (lithium battery) 3 strings 3.7V=11.1V B3=Lithium iron phosphate battery 4 strings 3.2V= 12.8V Equalization 14.4V(B1) 12.6V(B2) 14.6V(B3) Discharge stop 10.7V(B01) 9V(B2) 10V(B3) Discharge reconnect 12.6V(B1) 10.5(B2) 12V(B3) Voltage of open light Solar panel 8V(Light lights delay) Voltage of close light Solar panel 8V(Light off delay) USB output 2 way USB output. 5V/2.5A(MAX) Self-consume