Step 1 Choose PV Module

Since Nt for all PV modules are same during installation, so ignore Nt during evaluation.

1.4 Calculate ftemp_ave

1) In this article Tmod_ave already assumed, for formula may refer to Step 4 Average Irradiance- Weighted Cell Temperature 

2) Convert YPmax from <W °C-1> or <W K-1> to <% °C-1 > or <% K-1 > if need.

YPmax (% °C-1) = [ YPmax (W °C-1) / Pmax STC ] * 100 % 

Example

• SOLARMAN 200W

• YPmax = - 0.76 W °C-1

• YPmax = ( - 0.76 / 200 ) * 100 = -0.38 % °C-1

Example

• SOLARMAN 200W = 1 + [(-0.38) /100 x (55 - 25)] = 0.886

• SURIA 220W = 1 + [(-0.44) /100 x (55 - 25)] = 0.868

• SINAR 200W = 1 + [(-0.358) /100 x (55 - 25)] = 0.8926

• SILAU 175W = 1 + [(-0.43) /100 x (55 - 25)] = 0.871