String diodes

STRING DIODES

Blocking diode for strings of photovoltaic systems. BLOCK DIODES OR STRING DIODES are used to solve any problem due to the parallel connection of strings of photovoltaic panels when one or more of these are less exposed to sunlight than others. In this case there is the possibility that these partially suck the energy from the well exposed strings. These diodes, block sayings, they must be connected in SERIES to the strings, that is, between the positive and the negative of each of them. These diodes have the function of "non-return valve" that is, they only allow the string to supply current, preventing any energy input (forced by other strings). With these diodes, if strings with different voltages are placed in parallel, the one with higher voltages is prevented from transferring part of the energy to the string with lower voltage, somehow guaranteeing independence between the strings connected in parallel.