Error in simulation

  • Indrajit D. Pharne
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07 Sep 2025 11:31 #14272 by Indrajit D. Pharne
Error in simulation was created by Indrajit D. Pharne
Dear sir, 
I hope you finds you well!
I am Indrajit PhD Scholar. I have designed a solar cell and its module of 60 cells. I am trying to simulate this module in SAM but it couldn't run. My module parameters are 
Voc=64.2 V
Isc=3.82 
FF= 44.03
PCE= 7.39
Vmpp=42
Impp=2.56

With these parameters SAM gives an error i.e. 
'exec fail(pvsamv1): CEC 6 parameter model:  Could not solve for normalized coefficients.  Please check your inputs.
Simulation pvsamv1 failed :exec fail(pvsamv1): CEC 6 parameter model:  Could not solve for normalized coefficients.  Please check your inputs.
gen not assigned
Simulation grid failed :gen not assigned'
Kindly look into this matter and help me in this regards

Thank You!

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  • Paul Gilman
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08 Sep 2025 09:40 #14275 by Paul Gilman
Replied by Paul Gilman on topic Error in simulation
Hi Indrajit,

Please attach a copy of the .sam file with the parameters you entered for your PV module if you would like me to help troubleshoot. The "CEC Performance Model with User Entered Specifications" option in SAM requires the following parameters:

Cell type (monocrystalline, polycrystalline, CdTe, CIS, CIGS, amorphous)
Vmp, VDC
Imp, A
Voc, VDC
Isc, A
Temp coeff of Voc, V/°C
Temp coeff of Isc, A/°C
Temp coeff of Pmp, %/°C
Number of cells in series
NOCT, °C
Module area, m
Module aspect ratio (module length /  module width)

Best regards,
Paul.

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