A kilowatt hour (kWh) is a unit of energy — one kilowatt of power used for one hour. It is what retailers bill, what feed-in tariffs credit, and what batteries store. Australian solar decisions get clearer when you separate kW (power capacity) from kWh (energy over time).
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Indicative 2026 pricing: a typical 6.6kW system often quotes around $5,000–$8,000 after the STC discount (metro installs often $5,000–$7,500; premium/regional can run higher). See our solar cost guide.
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Import kWh are charged at your retail rates; export kWh are credited at your FiT. Supply charges are separate. A solar system reduces import kWh first; export credits are secondary in most 2026 FiT markets.
Installers forecast daily or annual kWh from your array using peak sun hours and loss factors. A 6.6kWp system in Brisbane (about 5.5 peak sun hours) typically generates more annual kWh than the same array in Hobart (about 3.9). Compare forecasts for your city, not national averages.
Usable kWh — not branded “nominal” figures alone — determine how much evening load you can cover. The Cheaper Home Batteries Program discount is commonly discussed around ~$372 per usable kWh since 1 July 2025. Always confirm usable capacity on the proposal.
If you generate 30kWh and export 18kWh, you self-consumed 12kWh that day (simplified). Raising self-consumed kWh usually beats raising exported kWh when FiTs are low. Shift loads or add storage to move kWh across the evening peak.
Not all kWh cost the same on time-of-use plans. A kWh imported at 4–8pm can be far more expensive than a midday kWh. Solar that covers shoulder/peak windows delivers more bill impact per kWh generated.
Ask CEC-accredited installers via MrSolar for expected annual kWh and a self-consumption scenario for your household. Price per watt is incomplete without energy and tariff context.
Translate quotes into kWh savings — get CEC-accredited proposals via MrSolar.
Written and reviewed by Daniel (Marketplace lead, Epic Unicorn Pty Ltd). We build pages from Australian solar datasets and regulatory references, then map you to CEC-accredited installers only.
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