Solar panels are now a mainstream Australian home upgrade — more than one in three dwellings already generate rooftop power, and the Clean Energy Regulator counts multi-million small-scale installations nationwide. This complete 2026 guide walks through system sizing, STCs, DNSP approvals, indicative costs ($5,000–$8,000 after STC for many metro 6.6kW jobs), batteries and installer selection so you can buy with clear eyes via 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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Panels produce DC electricity; an inverter converts it to AC for your switchboard. Surplus can export through a bi-directional meter for a retailer feed-in tariff, while shortfalls still draw from the grid. DNSPs (Ausgrid, Energex, SAPN, Western Power and others) set technical rules. CEC-accredited designers size strings, protection and export limits so the system energises legally. Self-consumption — running hot water, air-con or EVs when the sun is up — usually beats chasing FiT cents. Do not pay a large deposit until the quote names the DNSP, proposed inverter capacity, expected export limit and who lodges the micro-EG application. Save PDFs of every plan, approval and datasheet — warranty claims years later depend on that trail.
Start with seasonal kWh usage and roof geometry. A 6.6kW system often suits family homes and can generate roughly 20–33 kWh/day depending on city sun hours (Brisbane/Perth stronger than Hobart). 5kW suits smaller loads; 10kW+ fits pools, ducted heating and EV charging when the network allows. North is classic; east-west can flatten the curve. Shade analysis matters more than brochure peak watts. Keep decisions grounded in your interval data, roof constraints and written DNSP settings rather than national averages or salesperson screenshots. Photograph your switchboard and roof planes before quoting day to cut variation risk.
Small-scale Technology Certificates provide the main national upfront discount. With spot $39.85 as of 2026-08-05, Zone 3 capitals (Sydney, Brisbane, Perth, Adelaide, Canberra in MrSolar defaults) see about $1,435 off a 6.6kW class system; Zone 4 Melbourne/Hobart about $1,235; Darwin’s higher zone rating improves certificates further. After STC, many metro installs quote $5,000–$8,000 for 6.6kW (often $5,000–$7,500 in competitive markets). 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). Save PDFs of every plan, approval and datasheet — warranty claims years later depend on that trail.
Victoria’s Solar Homes, Queensland’s Battery Booster, SA’s Home Battery Scheme, ACT Next Gen and NT battery support can stack on top of STCs when you qualify. The federal Cheaper Home Batteries Program has been live since 1 July 2025 at ~$372/kWh usable. NSW and Tasmania currently lean on federal mechanisms for most residential buyers. Always itemise each incentive on the quote. 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). Photograph your switchboard and roof planes before quoting day to cut variation risk.
Expect site assessment, written quote, DNSP application, install day, inspection/metering and monitoring setup. Verify panel and inverter models against CEC lists, photograph serials, and keep STC assignment paperwork. Workmanship warranty and roof flashing quality decide whether you are celebrating in year two or chasing leaks. Compare three CEC-accredited proposals before paying a large deposit. Keep decisions grounded in your interval data, roof constraints and written DNSP settings rather than national averages or salesperson screenshots. Save PDFs of every plan, approval and datasheet — warranty claims years later depend on that trail. Keep decisions grounded in your interval data, roof constraints and written DNSP settings rather than national averages or salesperson screenshots. Photograph your switchboard and roof planes before quoting day to cut variation risk.
Strong cases share daytime load, a suitable roof, realistic export expectations and a tariff that rewards self-consumption. Weak cases include heavy shading, imminent roof replacement, or moving house within a couple of years without capturing value. CER data shows deep national penetration for a reason — but your NMI’s export limit still has a veto. Model your bill; then buy. Keep decisions grounded in your interval data, roof constraints and written DNSP settings rather than national averages or salesperson screenshots. Photograph your switchboard and roof planes before quoting day to cut variation risk. Keep decisions grounded in your interval data, roof constraints and written DNSP settings rather than national averages or salesperson screenshots. Save PDFs of every plan, approval and datasheet — warranty claims years later depend on that trail.
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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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