Quick answer
Household energy use varies with household size, climate, gas versus electric appliances, pools, EVs and heating/cooling.
What matters most
- Use your own annual kWh where available.
- Quarterly bills can hide seasonal peaks.
- Smart-meter data helps distinguish daytime and overnight demand.
Use your own tariff where possible
Australian electricity prices vary by plan and network. A national average can be useful for a rough example, but a decision-quality calculation should use the usage charges shown on your current bill.
How to calculate it with SunnyWatly
Use the relevant calculator with your own bill, quote or vehicle information. Defaults are examples only and can become stale as tariffs, rebates and hardware change.
Do not rely on a headline figure alone. Ask what assumptions sit behind the estimate and whether they match your property, tariff and usage pattern.
What can change the result
- Electricity usage and time of day.
- Retail import and feed-in tariffs.
- Roof, shading, inverter or charger constraints.
- Hardware efficiency and usable capacity.
- Network limits and future tariff changes.
Primary public sources used by SunnyWatly