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

e.       Fuse: over current protection for each unit

f.        Switch: change the status of charging and load current.

g.       Potentiometer: to change current and provide analog load to solar panel.

h.      Test sockets: to connect with multimeter (red: positive; black: negative; green: current test)

i.         Angle board: show the inclined angle of solar panel.