Sandia has released version 1.3 of PVLib, its widely used Matlab toolbox for modeling photovoltaic (PV) power systems.  The version 1.3 release includes the following added functions:

  • functions to estimate parameters for popular PV module models, including PVsyst and the CEC ‘5 parameter’ model
  • a new model of the effects of solar spectrum on PV module current
  • code to access weather data from NOAA’s Integrated Surface Data network

PVLib version 1.3 can be downloaded for free at and is released under an open source software license.