Home battery rebate & payback calculator
Estimates use the official STC factors and size tiers (DCCEEW), plus Solar Choice's Nov 2026 installed price index. Your quote will differ, so use this to sanity-check what you are offered.
- STCs created
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- Discount value
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- Typical price before discount*
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- Typical price after discount*
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- Estimated bill saving
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- Simple payback
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*Based on Solar Choice's Nov 2026 battery-only index (about $738/kWh at 10 kWh, falling to about $711/kWh at 50 kWh). It excludes any new solar panels.
Compare real quotes →General information only, not financial advice. The STC count is rounded down, as in the scheme. Tariff figures are examples, so use your own. Savings ignore battery degradation, tariff changes and any VPP payments.
How the maths works
STCs = (first 14 kWh × factor) + (14–28 kWh × factor × 60%) + (28–50 kWh × factor × 15%), rounded down. Multiply by the STC value to get your discount.
Savings = kWh shifted per day × 365 × (import tariff − feed-in tariff). This is the money you keep by using stored solar instead of buying from the grid.
Example: a 13.5 kWh battery installed before 31 Dec 2026 creates 91 STCs, worth about $3.5k at $39.
Next step
Use your estimate to check installer quotes. A quote far above the index deserves questions.
Compare free installer quotes →Get our battery quote checklist
A one-page checklist of the questions that stop you overpaying, plus a reminder before the discount steps down on 1 Jan 2027.