Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question

Revision history [back]

click to hide/show revision 1
initial version

PhotovoltaicPerformance:EquivalentOneDiode Severe Error

I am trying to run panels described in the California Energy Comission Database https://www.energy.ca.gov/media/2367 Most panels produce a fatal crash in EnergyPlus using the OneDiode model. I am using EnergyPlus Version 23.1.0-87ed9199d4

* Severe * EquivalentOneDiode Photovoltaic model failed to find maximum power point * ~~~ * Numerical solver failed trying to take exponential of too large a number
* ~~~ * Check input data in PhotovoltaicPerformance:EquivalentOne-Diode * ~~~ * VV (voltage) = 17.15636 * ~~~ * II (current) = -3335.62140 * Fatal * FUN: EnergyPlus terminates because of numerical problem in EquivalentOne-Diode PV model
...Summary of Errors that led to program termination: ..... Reference severe error count=1

Is this model not maintained anymore? It seems unusable with more modern panels unless I am missing something.

Here are two panel descriptions -> Panel0 works, Panel1 causes the crash.

PhotovoltaicPerformance:EquivalentOne-Diode,
  Panel0PhotovoltaicPerformance, ! Name
  CrystallineSilicon, ! cell Type
  60, ! cells in series
  1, ! module area [m2]
  0.9, ! tau alpha product
  1.12, ! electron bandgap [eV]
  1000000, ! shunt resistance [ohms]
  9.34, ! short circuit current [A]
  38.63, ! open circuit voltage [V]
  25, ! reference temperature [C]
  1000, ! reference radiation [W/m2]
  2.24, ! current at max power
  29.84, ! voltage at max power
  0.052, ! dIsc/dT
  -0.313, ! dVoc/dT
  20, ! NOCT ambient temp [C]
  47.4, ! NOCT cell temp [C]
  800, ! NOCT radiation [W/m2]
  30, ! heat loss coeff [W/m2-K]
  50000; ! heat capacity [J/K]


PhotovoltaicPerformance:EquivalentOne-Diode,
  Panel1PhotovoltaicPerformance, ! Name
  CrystallineSilicon, ! cell Type
  72, ! cells in series
  2.14, ! module area [m2]
  0.9, ! tau alpha product
  1.12, ! electron bandgap [eV]
  1000000, ! shunt resistance [ohms]
  11.36, ! short circuit current [A]
  49.1, ! open circuit voltage [V]
  25, ! reference temperature [C]
  1000, ! reference radiation [W/m2]
  10.67, ! current at max power
  40.8, ! voltage at max power
  0.062, ! dIsc/dT
  -0.313, ! dVoc/dT
  20, ! NOCT ambient temp [C]
  45.4, ! NOCT cell temp [C]
  800, ! NOCT radiation [W/m2]
  30, ! heat loss coeff [W/m2-K]
  50000; ! heat capacity [J/K]

PhotovoltaicPerformance:EquivalentOneDiode Severe Error

I am trying to run panels described in the California Energy Comission Database https://www.energy.ca.gov/media/2367 Most panels produce a fatal crash in EnergyPlus using the OneDiode model. I am using EnergyPlus Version 23.1.0-87ed9199d4

* Severe * EquivalentOneDiode Photovoltaic model failed to find maximum power point * ~~~ * Numerical solver failed trying to take exponential of too large a number
* ~~~ * Check input data in PhotovoltaicPerformance:EquivalentOne-Diode * ~~~ * VV (voltage) = 17.15636 * ~~~ * II (current) = -3335.62140 * Fatal * FUN: EnergyPlus terminates because of numerical problem in EquivalentOne-Diode PV model
...Summary of Errors that led to program termination: ..... Reference severe error count=1

Is this model not maintained anymore? It seems unusable with more modern panels unless I am missing something.

Here are two panel descriptions -> Panel0 works, Panel1 causes the crash.

PhotovoltaicPerformance:EquivalentOne-Diode,
  Panel0PhotovoltaicPerformance, ! Name
  CrystallineSilicon, ! cell Type
  60, ! cells in series
  1, ! module area [m2]
  0.9, ! tau alpha product
  1.12, ! electron bandgap [eV]
  1000000, ! shunt resistance [ohms]
  9.34, ! short circuit current [A]
  38.63, ! open circuit voltage [V]
  25, ! reference temperature [C]
  1000, ! reference radiation [W/m2]
  2.24, ! current at max power
  29.84, ! voltage at max power
  0.052, ! dIsc/dT
  -0.313, ! dVoc/dT
  20, ! NOCT ambient temp [C]
  47.4, ! NOCT cell temp [C]
  800, ! NOCT radiation [W/m2]
  30, ! heat loss coeff [W/m2-K]
  50000; ! heat capacity [J/K]


PhotovoltaicPerformance:EquivalentOne-Diode,
  Panel1PhotovoltaicPerformance, ! Name
  CrystallineSilicon, ! cell Type
  72, ! cells in series
  2.14, ! module area [m2]
  0.9, ! tau alpha product
  1.12, ! electron bandgap [eV]
  1000000, ! shunt resistance [ohms]
  11.36, ! short circuit current [A]
  49.1, ! open circuit voltage [V]
  25, ! reference temperature [C]
  1000, ! reference radiation [W/m2]
  10.67, ! current at max power
  40.8, ! voltage at max power
  0.062, ! dIsc/dT
  -0.313, ! dVoc/dT
  20, ! NOCT ambient temp [C]
  45.4, ! NOCT cell temp [C]
  800, ! NOCT radiation [W/m2]
  30, ! heat loss coeff [W/m2-K]
  50000; ! heat capacity [J/K]