User manual

8
a)
b)
Fig. 003: a) Solar module with protective lm, b) Circuit symbol
1.4 Diodes
A diode only permits current to ow in one direction. They are therefore used to
rectify alternating voltages and block undesired polarity in direct voltage. The func-
tion of a diode can be imagined as a kind of check valve (as in water installations)
in regular operation.