a. Solar panel: absorb solar radiation and create electricity;
b. Battery: Store electricity and discharge upon insufficient sunlight;
c. Controller: control the charging or discharging process of whole system;
d. DC load: use to demonstrate discharging process of system with output DC 12V;
e. Fuse: over current protection for each unit;
f. Switch: Master switch, change the status of charging and load, DC load output control;
g. S1, S2, S3: to change measuring mode (digital display or by multimeter);
h. Potentiometer: to adjust current of load and provide analog load to solar panel;
i. Test sockets: to connect with multimeter (red: positive; black: negative; blue: current test);
j. Digital meter: to display live voltage and current;
k. Leakage protector: to provide security of AC output;
l. Six-hole socket: to connect with external appliance with small power;
m. AC output: AC100V/60Hz or AC220V/50Hz
