by Mohamad Ibrahim bin Kamaruzzaman
for Tn Hj.Dr. Zainuddin bin Kornain

Saturday, 1 September 2012

EFFECT OF SHADING ON MODULE PERFORMANCE


  • When one module in an array is shaded, the output of the entire array can be drastically reduced. The use of a diode can minimize the effect of shading.
  • The diode can be used for several functions:
  1. Blocking Diode: Placed between the module and battery to stop the module from leaking to the battery current from reversing the flow from the battery to the array at night or cloudy weather.
  2. Bypass Diode: Wired in parallel with a module to divert current around the module in the event of shading.

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