Same comment as I made to Enrique, why not stretch your installation to include hydrogen generation and replace the battery with a fuel cell?
Then you could go off-grid, and I bet you wouldn't be using anything like 45KW after that, with no change to your appliance settings / creature comforts (45 KW continuous sounds crazy high, like at least 5x what it should be, even for a house the size of yours, with all the appliances you listed)