Unfortunately there is an error in the calculation of one of the examples. This can lead to confusion.
An Energy Unit is completely in the house or storage battery if it only touches the area (= the field).
Units that are on top of another unit, or that are in any way supported by another unit or the fence of the storage battery will get no points.
See the corrected example for the house. (24 instead of 44 points.) And the extra example added. (Only points for the yellow unit in this case.)
To avoid further confusion:
“only touching” refers to how the unit is supported. It is OK if units that are fully supported by the field are just touching each other because they are next to each other.