When restarting I see events like this in events.log:
2020-10-14 17:01:21.804 [INFO ] [marthome.event.ItemStateChangedEvent] - Item 'iMeter1Kwh' changed from 26.1861 to 26.1861 kWh
2020-10-14 17:01:21.810 [INFO ] [marthome.event.ItemStateChangedEvent] - Item 'iMeter1Watts' changed from 0.0 to 0 W
2020-10-14 17:02:15.159 [INFO ] [marthome.event.ItemStateChangedEvent] - Item 'iMeter2Kwh' changed from 0.0 to 0.0000 kWh
2020-10-14 17:02:15.188 [INFO ] [marthome.event.ItemStateChangedEvent] - Item 'iMeter2Watts' changed from 0.0 to 0 W
Later on it’s logged correctly:
2020-10-15 03:22:15.208 [INFO ] [marthome.event.ItemStateChangedEvent] - Item 'iMeter2Watts' changed from 1 W to 0 W
2020-10-15 03:27:15.141 [INFO ] [marthome.event.ItemStateChangedEvent] - Item 'iMeter2Watts' changed from 0 W to 1 W
2020-10-14 16:59:40.497 [ERROR] [org.openhab.core.items.GenericItem ] - Tried to set invalid state 0.0 (DecimalType) on item bathFans of type SwitchItem, ignoring it