STC
<math>I_{\rm STC} = I_{\rm Mess} \frac {1000 \frac {W} {m^2} } {G_{\rm Mess} } </math>
Imess = 2
G= 500
Calculation 4
m Si, p-S a = 0.06 b = 0.0045
CIS = a = 0.06 b = 0.0045
<math>D_{\rm v} = a \cdot {\ln \left ( \frac {1000 \frac {W} {m^2} } {G_{\rm Mess}} \right ) } + b \cdot { ( G_{\rm Mess} -25^{\circ}C) }</math>
<math>U_{\rm STC} = U_{\rm Mess} + \cdot \left ( \frac {Dv} {1-Dv} \right ) {U_{\rm OC Mess} } \ </math>
<math>Y_{\rm T} = G_{\rm G} [1+c_{\rm T}(Tz -To) ] </math>