# Off-grid solar and storage sizing
# Scope: Daily load and autonomy storage, supplied usable fraction.
# Status: illustrative worked example; engineering review pending.
# Inputs are example values. Checks are editable example requirements, not standards.

load = 20 W
duration = 24 h
autonomyDays = 2
usable = 0.8
voltage = 24 V

daily := load*duration [Wh]
storage := daily*autonomyDays/usable [Wh]
capacity := storage/voltage [Ah]

check capacity budget: capacity <= 60 Ah

scenario alternative: load = 16 W