docs: def power(self):
          """:return: A power object modeled as a named tuple"""
          power = self._state['powerUsage']
          return PowerUsage(power.get('avgDayValue'),
                            power.get('avgValue'),
                            power.get('dayCost'),
                            power.get('dayUsage'),
                            power.get('isSmart'),
                            power.get('meterReading'),
                            power.get('value'),
                            power.get('meterReadingLow'),
                            power.get('dayLowUsage'))