Sorry that 30KWH was a daily average. So 900 KWH monthly. I have a gas stove and clothes dryer. I have plenty of time and motivation, so building my own battery system is definitly in the cards, unless that powerwall price is accurate. Being new construction, the tesla solar roof and powerwall almost actually makes sense with the hefty rebates. Doing a traditional roof will yield me no rebate on the roofing itself, just the solar, but going the tesla route I earn the rebate for the entire roofing of my new home. I know they are not designed for off grid, but it seems just a software update away or hopefully integrated into a V3 powerwall whenever that comes. I am probably 12 months out from roofing the house. I don't even have permits yet.
That's what had me totally baffled,
I'm earth sheltered home, no real heating or cooling consumption, and according to the government about 20kWh is 'Average'.
I would design in any and all reasonable efficiency, starting with home insulation and sealing up everything against air leaks.
If the pool is mandatory, consider solar thermal for heating if needed.
Also consider salt opposed to chlorine so the pool doesn't need the extra circulation/cleaning/maintenance.
As much south facing roof as possible, for both thermal & PV panels.
Then research induction cook tops and steel/iron cookware.
While they are rated at really high consumption, the electro-magnetic induction is stupid efficient and you will burn everything past about half power.
The better a magnet sticks to the pan, the more efficient it will be with induction.
My 1,800 induction top will boil a gallon of water in under 3 minutes in cast iron.
It also doesn't heat the house up like gas or resistance electric that dumps a lot of heat into the room.
Think of it like a microwave for pots & pans.
Look at the consumption rate on everything, including timers or motion sensors for light switches, entertainment systems, etc. Nothing gets left on and wastes power.
I got light switches intend for outside with light sensors, you can't even turn a light on in common areas with big windows in the daytime without jumping though hoops.
Keeps that reflex of flipping on light when you don't need them under control.
That includes 'Smart Chargers' or timers on cell phone, pad, lap top chargers and any other 'Wall Wort' (transformer) chargers.
Those things are power hogs...
Consider sky lights or light pipes in common areas, the light pipe in my utility, bath, kitchen rooms do a great job, just the outside security light is enough to make light pipes effective night lights.
Conservation is ALWAYS the first step in Off Grid unless you are rich and stupid, and just insist on wasting energy.
Some idiots think wasting everything is a status symbol... I don't have much use for those types...
Once you have a good idea of consumption,
Then work at what feeds that consumption, an inverter properly sized.
Work back from there to panels that will SUPPLY every Watt or BTU.
Charge controllers that will pass that filtered power to consumption, and recharge batteries in a reasonable time.
Power, absent sunlight, will come from batteries or generator.
Batteries need to be sized for the normal loads needed,
If you don't want to do a generator, then a battery bank large enough to cover a day or two without sun,
Translation, a MUCH bigger battery bank, since it's not just nighttime power, but all power for a day or two.