I have a hot water tank. But I can’t measure the current from it. But I know that it consumes 3kwh when it heats up.
Now I need an entity (or more) that always calculates these 3kwh for me. But this should only be possible via a button on the dashboard.
This is because it is switched on irregularly. Sometimes daily, sometimes every 2 days.
Is it possible to create an entity that only writes 3kwh to the Energy Dashboard at the touch of a button?