def run_model(self, times=None, weather=None):
        """
        Run the model.

        Parameters
        ----------
        times : None or DatetimeIndex, default None
            Times at which to evaluate the model. Can be None if
            attribute `times` is already set.
        weather : None or DataFrame, default None
            If None, assumes air temperature is 20 C, wind speed is 0
            m/s and irradiation calculated from clear sky data. Column
            names must be 'wind_speed', 'temp_air', 'dni', 'ghi', 'dhi'.
            Do not pass incomplete irradiation data. Use method
            :py:meth:`~pvlib.modelchain.ModelChain.complete_irradiance`
            instead.

        Returns
        -------
        self

        Assigns attributes: times, solar_position, airmass, irradiance,
        total_irrad, effective_irradiance, weather, temps, aoi,
        aoi_modifier, spectral_modifier, dc, ac, losses.
        """

        self.prepare_inputs(times, weather)
        self.aoi_model()
        self.spectral_model()
        self.effective_irradiance_model()
        self.temp_model()
        self.dc_model()
        self.ac_model()
        self.losses_model()

        return self
Run the model.

        Parameters
        ----------
        times : None or DatetimeIndex, default None
            Times at which to evaluate the model. Can be None if
            attribute `times` is already set.
        weather : None or DataFrame, default None
            If None, assumes air temperature is 20 C, wind speed is 0
            m/s and irradiation calculated from clear sky data. Column
            names must be 'wind_speed', 'temp_air', 'dni', 'ghi', 'dhi'.
            Do not pass incomplete irradiation data. Use method
            :py:meth:`~pvlib.modelchain.ModelChain.complete_irradiance`
            instead.

        Returns
        -------
        self

        Assigns attributes: times, solar_position, airmass, irradiance,
        total_irrad, effective_irradiance, weather, temps, aoi,
        aoi_modifier, spectral_modifier, dc, ac, losses.