Guides
Plain-language background on bills, solar, EV charging, and how this calculator estimates home battery size. Pick a topic below or jump between guides at any time.
Guide 1 of 5
What this calculator does with daily kWh, cover hours, and reserve percentage — and what it does not try to do.
Guide 2 of 5
Where average daily usage appears on typical Australian bills, and why winter and summer figures both matter.
Guide 3 of 5
How generation and grid export relate to self-consumption, and why bills are already “net” of solar.
Guide 4 of 5
How EV kilometres per week translate to daily kWh, and when to include charging in your storage estimate.
Guide 5 of 5
Common residential capacities (5–15 kWh), what households they suit, and why nameplate kWh is not the whole story.
Each guide is written for Australian households sizing storage from bills and solar data. Start with how battery size is estimated, then dig into bills, export, EV charging, or typical kWh ranges as needed.
© 2026 Solar Battery Calculator. Estimates only — not financial advice.