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Model your actual or proposed system — panels and their orientation, inverter, battery, EV and usage — and see what it saves. Every figure updates as you edit, grounded in current Synergy rates and WA rebates.
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Estimated annual savings
$2,140 /yr
Simple payback
6.1 years
Return / yr
16.4%
Annual generation
10069 kWh
Self-consumption
56%
DEBS export credit
$267/yr
CO₂ avoided
6.7 t/yr
≈ 310 trees
Where the savings come from
Indicative rebate stack
STC value moves with the certificate market; treat the gross figure as indicative.
≈ 6.6 kW · 99% of optimal · ~10166.2 kWh/yr
The total you pay the installer after rebates come off. Leave blank to skip payback.