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