I am quite unfamiliar with wiring in residential houses so bear with me. I have an electric car that I can charge with 32A EVSE. My main house fuse is 32A. I am curious if there is a device that can dynamically disconnect power for one specific socket if it detects that power draw if it approaches the 32A limit? I could probably get a bigger fuse, but it would be very expensive because I would have to pay a monthly premium in my electricity bill.
My reasoning would be that this would disconnect the car from charging, but not turn off the main house fuse with all the other appliances?
I have attached a crude drawing of what this device would look like. It would have a power meter on the main input of the house, and would measure the total current that the house draws. If it approaches the limit of the house fuse, a relay would disconnect a sub-circuit (the garage for example).
Is this something that exists? This would seem very handy to have, even if you have to redo some wiring.