0.5.1

v0.5.1 (October 17, 2017)

API Changes

• pvsystem.v_from_i and pvsystem.i_from_v functions now accept
  resistance_series = 0 and/or resistance_shunt = numpy.inf as inputs
  (:issue:340)

Enhancements

• Improve clearsky.lookup_linke_turbidity speed. (:issue:368)
• Ideal devices supported in single diode model, e.g.,
  resistance_series = 0 and/or resistance_shunt = numpy.inf (:issue:340)
• pvsystem.v_from_i and pvsystem.i_from_v computations for near ideal
  devices are more numerically stable. However, very, very near ideal
  resistance_series and/or resistance_shunt may still cause issues with the
  implicit solver (:issue:340)

Bug fixes

• Remove condition causing Overflow warning from clearsky.haurwitz
  (:issue:363)
• modelchain.basic_chain now correctly passes 'solar_position_method'
  arg to solarposition.get_solarposition (:issue:370)
• Fixed: Variables and Symbols extra references not available <https://github.com/pvlib/pvlib-python/issues/380>_ (:issue:380)
• Removed unnecessary calculations of alpha_prime in spa.solar_position_numpy
  and spa.solar_position_loop (:issue:366)
• Fixed args mismatch for solarposition.pyephem call
  from solarposition.get_solarposition with method='pyephem'
  arg to solarposition.get_solarposition (:issue:370)
• ModelChain.prepare_inputs and ModelChain.complete_irradiance now
  correctly pass the 'solar_position_method' argument to
  solarposition.get_solarposition (:issue:377)
• Fixed usage of inplace parameter for tmy._recolumn (:issue:342)

Documentation

• Doc string of modelchain.basic_chain was updated to describe args
  more accurately. (:issue:370)
• Doc strings of singlediode, pvsystem.v_from_i, and pvsystem.i_from_v
  were updated to describe acceptable input arg ranges. (:issue:340)

Testing

• Changed test for clearsky.haurwitz to operate on zenith angles
• Significant new test cases added for pvsystem.v_from_i and
  pvsystem.i_from_v (:issue:340)

Contributors

• Cliff Hansen
• KonstantinTr
• Will Holmgren
• Mark Campanelli
• DaCoEx