Salt Mist Corrosion Testing of Photovoltaic (PV) Modules

• Severity 1: 
  4 cycles with 7 days of each cycle including 2 hours of salt mist spray followed by 7 days of storage under high humidity condition

• Severity 3 / 4 / 5 / 6:
  1 / 2 / 4 / 8 cycles with 7 days of each cycle Including initial 4 days with 2 hours of salt mist spray and 22 hours of storage under high humidity condition every day, followed by 3 days of storage under a standard atmosphere

a) No evidence of major visual defects

b) Pass insulation test

c) Pass wet leakage current test

d) Degradation of maximum power output < 5%