Leftover kWh sensor using other kWh sensors

Energy
,
1

Is there a simple way in HA to create a kWh sensor using other kWh sensors?
So in my case i have:

  • Meter kWh sensor (p1) which is the total used
  • Office downstairs kWh sensor
  • Office upstairs kWh sensor
  • Charger kWh sensor
  • Climate kWh sensor

What’s not measured is the hall downstairs and the storage. I would like to include that in the energy page. But kinda stumped atm on how to create one using the others.
image
Its the gray part i want to name. and show up in Individual devices total usage
My fist instinct was to just subtract the 4 areas from the p1 meter… But i soon realized that wont work, i’m thinking in the wrong direction… i think :smiley:

2

Hello there.

Why? Because you have only total sensors or because of the different polling times?
And for what do you want/need that senor. The solution could depend on that