pvlib.modelchain.basic_chain

pvlib.modelchain.basic_chain(times, latitude, longitude, module_parameters, inverter_parameters, irradiance=None, weather=None, surface_tilt=None, surface_azimuth=None, orientation_strategy=None, transposition_model='haydavies', solar_position_method='nrel_numpy', airmass_model='kastenyoung1989', altitude=None, pressure=None, **kwargs)[source]

An experimental function that computes all of the modeling steps necessary for calculating power or energy for a PV system at a given location.

Parameters:

times : DatetimeIndex

Times at which to evaluate the model.

latitude : float.

Positive is north of the equator. Use decimal degrees notation.

longitude : float.

Positive is east of the prime meridian. Use decimal degrees notation.

module_parameters : None, dict or Series

Module parameters as defined by the SAPM.

inverter_parameters : None, dict or Series

Inverter parameters as defined by the CEC.

irradiance : None or DataFrame

If None, calculates clear sky data. Columns must be ‘dni’, ‘ghi’, ‘dhi’.

weather : None or DataFrame

If None, assumes air temperature is 20 C and wind speed is 0 m/s. Columns must be ‘wind_speed’, ‘temp_air’.

surface_tilt : float or Series

Surface tilt angles in decimal degrees. The tilt angle is defined as degrees from horizontal (e.g. surface facing up = 0, surface facing horizon = 90)

surface_azimuth : float or Series

Surface azimuth angles in decimal degrees. The azimuth convention is defined as degrees east of north (North=0, South=180, East=90, West=270).

orientation_strategy : None or str

The strategy for aligning the modules. If not None, sets the surface_azimuth and surface_tilt properties of the system. Allowed strategies include ‘flat’, ‘south_at_latitude_tilt’. Ignored for SingleAxisTracker systems.

transposition_model : str

Passed to system.get_irradiance.

solar_position_method : str

Passed to location.get_solarposition.

airmass_model : str

Passed to location.get_airmass.

altitude : None or float

If None, computed from pressure. Assumed to be 0 m if pressure is also None.

pressure : None or float

If None, computed from altitude. Assumed to be 101325 Pa if altitude is also None.

**kwargs

Arbitrary keyword arguments. See code for details.

Returns:

output : (dc, ac)

Tuple of DC power (with SAPM parameters) (DataFrame) and AC power (Series).