@sh.add_function(dsp, outputs=['initial_drive_battery_state_of_charge'])
def identify_initial_drive_battery_state_of_charge(
drive_battery_state_of_charges):
"""
Identify the initial state of charge of drive battery [%].
:param drive_battery_state_of_charges:
State of charge of the drive battery [%].
:type drive_battery_state_of_charges: numpy.array
:return:
Initial state of charge of the drive battery [%].
:rtype: float
"""
return drive_battery_state_of_charges[0]