What does solar actually pay back?
Your own bill, Perth's yield figures and the current rebate — modelled over the life of the system, not a headline year.
A 6.6kW solar system in Perth typically returns $1,200–$1,500 per yearand pays for itself in 3–4 years at 2026 Synergy rates. Batteries lift self-consumption from about 35% to about 85%, adding $600–$1,000 of annual benefit.
Tip: your last bill shows daily average — a typical Perth family uses 18–25 kWh.
$1,390
Annual benefit
3.1 yrs
Payback
+$9,610
10-year position
29 kWh
Daily generation
Assumes Synergy A1 rate (32c/kWh), DEBS feed-in (2–10c/kWh), north-facing array, Perth conditions. Self-consumption 35% without battery. Estimates only — your itemised quote includes a roof-specific model.
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All three run on the same Perth figures — Zone 3 STC rating, Synergy tariffs and DEBS export rates.