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Separate daily energy from peak power
Daily watt-hours determine energy storage and generation. Simultaneous running watts and startup surge determine the inverter and battery discharge requirements.
Decision 01
Build a daily load list
Record each device, its real operating pattern, and whether it runs through an inverter. Use a range when duty cycle is uncertain instead of pretending the number is exact.
Decision 02
Identify simultaneous loads
A kettle, microwave, induction cooker, pump, or compressor may create a peak that is much higher than average daily use. Do not add every appliance if they cannot operate together.
Decision 03
Plan for change
Leave a visible allowance for a future device or a changed travel pattern. A planning result should say which assumption moves the answer the most.