Why wouldn't I have eaten in three days?

30w is plenty to run a few small lights and phone chargers. You can cook over a wood fire if necessary, or store food that doesn't need cooking.

Kinda curious now what the back to reasonable normality for essential needs time is for most disasters. Don't need to stockpile enough to last until completely rebuilt, if food supplies are going to be restored fairly quickly but housing takes a year you don't need the full years food supply.