Scales the voltage, current, and power of the DataFrames
        returned by :py:func:`singlediode` and :py:func:`sapm`
        by `self.modules_per_string` and `self.strings_per_inverter`.

        Parameters
        ----------
        data: DataFrame
            Must contain columns `'v_mp', 'v_oc', 'i_mp' ,'i_x', 'i_xx',
            'i_sc', 'p_mp'`.

        Returns
        -------
        scaled_data: DataFrame
            A scaled copy of the input data.

def scale_voltage_current_power(self, data):
        """
        Scales the voltage, current, and power of the DataFrames
        returned by :py:func:`singlediode` and :py:func:`sapm`
        by `self.modules_per_string` and `self.strings_per_inverter`.

        Parameters
        ----------
        data: DataFrame
            Must contain columns `'v_mp', 'v_oc', 'i_mp' ,'i_x', 'i_xx',
            'i_sc', 'p_mp'`.

        Returns
        -------
        scaled_data: DataFrame
            A scaled copy of the input data.
        """

        return scale_voltage_current_power(data,
                                           voltage=self.modules_per_string,
                                           current=self.strings_per_inverter)