Every figure below comes from a real, standards-validated system design — not a rule of thumb. Pick the appliance and the kind of build you have, and see the battery, solar and wiring it actually takes.
~600 Wh/day · runs 24/7
~620 Wh/day · runs 24/7
~1000 Wh/day · runs 24/7
~4000 Wh/day · 1500 W surge
~400 Wh/day · 1800 W surge
~200 Wh/day · 2000 W surge