Mathematical operations on item.rawState using Javascript keeping UoM

Setup, Configuration and Use Scripts & Rules
2

You have to use the methods on the QuantityType to do the math or you need to convert them to the same unit before doing a plain number addition.

var myresult = value1.add(value2);

or

var myresult = value1 + value2.toUnit('kWh');

Though this second approach will still lose the units in myresult. If you want to keep the units you must use the methods to do math with QuantityTypes.

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