How can I calculate Tc and CE, when both the variables are interdependent?

I am trying to form a basic model of Solar PV with an hourly data of one whole year. In order to calculate the final output from the single PV module, I first have to calculate the cell temperature (Tc) and efficiency (CE), which are interrelated and unknown. The following are the equations for Tc and CE:

Tc=Ta+((G/800)(NOCT-20)(1-(CE/τα)))
CE=NCE(1-β(Tc-25)+0.12log(G/1000))

Can anyone help me in coding the above two equation to get Tc and CE as a number. Thank you.

Answer 1

[Torsten]

Linear System of equations for Tc and CE (2 equations for 2 variables). Use Cramer's rule or \ to solve.

Best wishes

Torsten.

[Shalini Nakkasunchi]

Thank you Torsten.