Thank you bmxeroh,
I am not interested in knowing why do these two values differ, but how they can be compared (without interfering with costs).
Indeed watt is watt.
But upper "4" is 4 kWh of electric energy.
While upper "5" is 5 kWh of thermal (?) energy.
These two can not be compared, as they are different types of energy.
Or did I get this wrong?
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