3 kW solar: explore the numbers.
Build your own cost and generation scenario. System size must be assessed against your roof and usage.
Build a planning range.
Illustrative model v1 — not researched Australian market prices. Replace the example rate with a real written quote. No rebate is assumed.
State does not change this model. Network, roof access, wiring, removal and switchboard work need separate quotes.
- Solar base
- 3 × $1,000 × 1 × 1 = $3,000
- Planning uncertainty
- ±20% of solar base (hypothetical)
- Battery allowance
- $0
- Automatic incentives
- None deducted
Your solar, your assumptions.
Explore an illustrative scenario. These defaults are examples, not local irradiation measurements, market prices or a personalised prediction.
Self-used 1,752 kWh · Exported 1,752 kWh
3 kW × 4 hours × 365 × 0.8 performance. Savings use A$0.3/kWh import and A$0.05/kWh export.
Illustration only. Excludes finance, degradation, tariff changes and export curtailment. A professional site design is required.
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Putting a 3 kW scenario into context
A 3 kW array represents 3000 watts of nominal panel capacity. For an illustrative 440-watt panel, rounding up gives 7 panels and 3.08 kW of panel capacity. This is arithmetic for planning, not a roof design or recommended equipment specification.
What to enter in the 3 kW models
- Your own installed-price quote, with exclusions and any incentives identified.
- Your tariff, export rate and expected daytime consumption.
- A site-specific generation assumption supplied with the design.
- Future heating, cooling, battery or vehicle charging loads where relevant.
Is 3 kW the right size for my property?
The calculator cannot establish that. Ask a designer to assess usable roof space, shading, consumption timing and connection conditions. The panel example above does not account for setbacks, walkways or roof structure.
Why can two 3 kW quotes differ?
Panel and inverter models, roof access, electrical upgrades, monitoring, warranties and labour scope can differ even when nominal capacity matches. Compare those line items before treating a lower total as better value.
General sizing reference: Australian Government solar sizing guide ↗