Strategies to distribute/allow power to different house appliances

Energy
1

I have a house with large electric consumer systems:

  • Electric radiators + Air conditionner (up to 7kW)
  • Electric car charger (up to 7kW)
  • Nordic SPA heating (up to 5kW)
  • Kitchen appliances (up to 5kW)
  • Water heater (up to 3kW)
  • Dryer, washer, dishwasher (up to 4kW)
  • And of course the rest of the house.

The issue is I only have 9kW available from the grid (I also have a peak 600W solar production but this is negligeable)

I so far have no issue of managing the house through home assistant to ensure that I constantly stay under the grid limit:

  • Electric radiators + Air conditionner - Automatic ON/OFF
  • Electric car charger - Automatic Reduce the charge (openevse integration)
  • Nordic SPA heating (up to 5kW) - Automatic ON/OFF on the 2 heatpump, circulation pump.
  • Kitchen appliances (up to 5kW) - Automatic ON/OFF on the main appliance electrical circuit.
  • Water boiler (up to 3kW) - Automatic: just heat when it can.
  • Dryer, washer, dishwasher (up to 4kW) - Automatic, switch off if lack of electricity.

However this is a bit of spaghetti plate as for automation.
Is there a generic solution existing for this - I suppose - generic problem ?

2

I thought one electricity subscription was measured in Amp ? , thou it sounds like your better of raise the level from grid provider 9KW sounds as lowest possible i.e max 16Amp, you seems to need 20 or 24Amp

PS: I also live on “borrowed” time, 16Amp-fuse, i have disconnect 2of3 conductors on my heat pump ( They use to divide the kw i 3, for a 3phase 7-9KW Device )