Fix it · practical guide
What size inverter and battery does my home need? — a load-first sizing tool
In one line: Tick your actual appliances and the tool sizes the inverter (with surge margin), battery bank and solar array — every line of the working shown. Load first, labels second.
The right inverter size is decided by your actual load — not by a sales counter. Tick what actually runs in your home, add anything missing, and the tool sizes the inverter (with a surge margin), the battery bank (for your chemistry and autonomy) and the solar array that refills it — showing every line of the arithmetic. It pairs with the desk’s generator-or-inverter guide: that page helps you choose; this one sizes what you chose.
Why the load list decides everything
Two homes can buy the “same” 1.5 kVA inverter and have opposite experiences, because one runs a fridge and a pump and the other runs lights and a TV. The load list is the only honest input: watts from the nameplate (not the marketing box), hours it actually runs a day, and the appliances that can start at the same time. Everything the tool outputs follows arithmetically from those three numbers.
The two classic mistakes it protects against: buying battery capacity in label amp-hours and getting half of it (deep-discharging lead-acid kills it), and sizing solar from the best month’s sunshine and wondering why harmattan leaves the bank empty.
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General information, not professional advice. Homes differ — if a job is beyond your confidence or the guide’s boundary, that is what tradespeople are for.