The critical requirements for PV modules are:
 *Type of PV modules must be crystalline silicon, either mono-C-Si or Poly C-Si;

 *The PV module must be certified by IEC 61215; IEC 61730 and the valid certificates must be provided.
 *The PV module efficiency (full size) must not be less than 14%.
 *The lifetime of the selected PV modules should be longer than 25 years. The degradation within first year must not be less than 3%.
 *The warrantee period for PV Module must be at least 10 years against a maximum 10% reduction of output power at STC.
 The manufacturer’s serial number should be inside the glass of PV Module.

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