Australian homeowners still ask for a single national solar price. The honest 2026 answer is a band: many metro 6.6kW systems land around $5,000–$8,000 after STCs, with competitive cities often $5,000–$7,500, while batteries, switchboard upgrades and complex roofs push higher. This guide breaks costs by size and zone, explains the $39.85 STC spot reference (as of 2026-08-05), and shows what belongs on a transparent quote before you compare CEC-accredited installers on MrSolar.
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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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Think in installed price after the point-of-sale STC discount, not pre-rebate stickers. A straightforward 6.6kW rooftop job in a competitive metro market commonly quotes between $5,000 and $7,500 after STC, with a wider national band of $5,000–$8,000 when labour markets and roof access vary. 5kW sits lower; 10kW and 13.3kW scale up but not always linearly because scaffolding, three-phase work and DNSP studies add step costs. These are planning ranges — your roof is not an average. Ask the installer to show the certificate or voucher maths with your postcode, the $39.85 spot assumption (as of 2026-08-05) where STCs apply, and a separate line for any Cheaper Home Batteries Program dollars (~$372/kWh usable since 1 July 2025). Insist on exclusions lists: scaffolding, meter upgrades, tilt frames and travel are classic surprise adders. Save PDFs of every plan, approval and datasheet — warranty claims years later depend on that trail.
Certificate volume depends on size, zone rating and deeming years remaining to 2030. Using MrSolar’s master table at $39.85/STC as of 2026-08-05, a 6.6kW system is about $1,435 in Zone 3 (Sydney, Brisbane, Perth, Adelaide, Canberra defaults), about $1,235 in Zone 4 (Melbourne, Hobart), and higher in stronger northern zones such as Darwin. Installers may pass through a broker rate different from spot — ask which price they used. Ask the installer to show the certificate or voucher maths with your postcode, the $39.85 spot assumption (as of 2026-08-05) where STCs apply, and a separate line for any Cheaper Home Batteries Program dollars (~$372/kWh usable since 1 July 2025). Insist on exclusions lists: scaffolding, meter upgrades, tilt frames and travel are classic surprise adders. Photograph your switchboard and roof planes before quoting day to cut variation risk.
Tile roofs, multi-storey access, long AC cable runs, switchboard replacements, heritage constraints, microinverters and premium modules all raise price. Simple tin roofs with easy access and standard string inverters sit at the low end. Export-limit equipment, revenue-grade meters and battery-ready hybrids also change the total. If two quotes differ by thousands, reconcile inclusions before assuming one installer is “expensive”. Compare at least three Clean Energy Council accredited proposals with identical inclusions, product models and workmanship warranty terms before you sign. Insist on exclusions lists: scaffolding, meter upgrades, tilt frames and travel are classic surprise adders. Save PDFs of every plan, approval and datasheet — warranty claims years later depend on that trail.
Residential batteries frequently add roughly $10,000–$16,000 before incentives. The Cheaper Home Batteries Program, live since 1 July 2025, knocks about $372 off each usable kWh — near $3,720 for 10 kWh usable — before state schemes in VIC, QLD, SA, ACT or NT. Always separate battery dollars from PV dollars on the quote so payback stories stay honest. Size usable kWh to your 4pm–9pm consumption, confirm CEC listing, and keep federal (~$372/kWh usable) and any state battery support itemised — never as one mystery “government discount”. Insist on exclusions lists: scaffolding, meter upgrades, tilt frames and travel are classic surprise adders. Photograph your switchboard and roof planes before quoting day to cut variation risk.
With many FiTs between roughly 2–10c/kWh depending on state and retailer, exporting is pocket money compared with avoiding 30c+/kWh imports. Payback commonly lands in a multi-year band when self-consumption is healthy; CER’s huge national install base exists because bills, not FiTs, carry the case. Use your tariff and daytime load to stress-test any salesperson’s “two-year payback” claim. Model bill outcomes with a conservative FiT (often 3–5c/kWh stress-test) and your real weekday daytime load — exported energy rarely beats displacing retail imports in 2026. Insist on exclusions lists: scaffolding, meter upgrades, tilt frames and travel are classic surprise adders. Save PDFs of every plan, approval and datasheet — warranty claims years later depend on that trail.
Collect three CEC-accredited quotes with identical size, products and exclusions. Require STC zone maths with an as-of date, DNSP fees and warranty terms. MrSolar’s matching service is free for homeowners and designed for apples-to-apples comparison — not a single locked-in price from a call centre. Treat metro 6.6kW after-STC bands (often $5,000–$8,000) as planning ranges only — roof access, switchboard upgrades and network fees move real invoices outside averages. Insist on exclusions lists: scaffolding, meter upgrades, tilt frames and travel are classic surprise adders. Photograph your switchboard and roof planes before quoting day to cut variation risk.
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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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