Paul, you are correct i have neither battery storage nor an air source heat pump. So i will gladly accept your first-hand knowledge in this instance.
Your numbers however are frightening and giving me pause for thought as I am in the process of installing a 9kw air source heat pump, 45kwh battery storage and another 5/6 kwh solar array together with my existing 3.6kwh solar array.
The only person who got all his work done by Friday was Robinson Crusoe.
Anything i post over three lines long please assume it is an article lol.