A quality 6.6 kW solar system costs $5,000-$6,500 after the federal discount, and a 10 kWh battery adds $7,000-$10,500 after its rebate. All rebate figures on this page are as at October 2026 - the battery rebate now steps down every six months, so treat any undated solar pricing you read (including ours, later) with suspicion.
Installers quote after the discount because they claim the certificates and take them off your price upfront. The discount inside a 6.6 kW system is roughly $1,500-$2,000; inside a 10 kW system, $2,000-$3,000.
| System | After-rebate range | Notes |
|---|---|---|
| 6.6 kW (most common) | $4,000-$8,500 | Quality systems typically $5,000-$6,500 |
| 10 kW | $7,000-$13,500 | Larger homes, high usage, EV charging |
| Benchmark rate | $0.88-$0.95 / watt | Installed, incl. GST, after rebate - a fast quote sanity check |
| Battery | Before rebate | After rebate |
|---|---|---|
| 10 kWh | $8,000-$15,000 | ~$5,500-$12,500 (typical $7,000-$10,500) |
| 13.5 kWh (Powerwall-class) | $13,500-$18,500 | ~$10,000-$15,000 |
| Rule of thumb | $1,000-$1,500 / kWh | Installed, before rebate |
The most popular pairing in the country - 6.6 kW of solar plus a 10 kWh battery - runs $12,000-$18,000 after both federal rebates; two independent 2026 guides agree on that band exactly. A 10 kW + 13 kWh combination is quoted at $16,000-$24,000 in the one published band we found - treat that figure as indicative only until more installers publish for it.
Solar (STCs): your system creates Small-scale Technology Certificates based on its size and your postcode's zone rating. The installer claims them and discounts your price upfront - you never see the paperwork unless something goes wrong. The scheme deems fewer years of generation each year until 2030, so the discount shrinks annually: waiting costs roughly $340-$365 a year in lost rebate on a 6.6 kW system in the Sydney/Newcastle zone.
Batteries (Cheaper Home Batteries Program, from July 2025): the battery discount works on a factor that started at about $372 per kWh, fell to about $252 per kWh in May 2026, and now steps down every six months. It also tiers by size: the full factor applies only to the first 14 kWh of capacity, 14-28 kWh earns 60% of the factor, and capacity beyond 28 kWh just 15%. That is why a 20 kWh battery is much poorer rebate value per kWh than a 10-13.5 kWh one - size the battery to your evening usage, not your roof.
Why batteries at all? Feed-in tariffs have fallen to roughly 3-10 cents per kWh while peak retail prices sit above 40 cents. Exporting solar earns little; storing it for the evening peak is where the value now is.
The biggest single lever - storage adds as much as the array itself ($5,500-$12,500 for 10 kWh after rebate, vs $4,000-$8,500 for a whole 6.6 kW array).
Identical capacities quote thousands apart by brand. One reported 6.6 kW + 20 kWh job drew quotes from $8,000 to $20,000 - get at least three.
Double-storey, steep or tile roofs, split arrays and three-phase or hybrid-inverter requirements all sit at the top of each band.
6.6 kW standard system + 10 kWh battery, standard roof: solar $5,000-$6,500 + battery $7,000-$12,000 = $12,000-$18,500 from our calculator - right on the published combined band of $12,000-$18,000 (the calculator's top corner runs $500 over the published band's extreme, which is why we show both).
Compliance: federal discounts require Clean Energy Council-approved products fitted by an accredited installer (SAA-accredited), who claims the certificates and discounts your price upfront. Network (DNSP) connection approval and export limits apply and vary by postcode. Batteries must be on the approved products list to attract the battery rebate. All rebate figures here are as at October 2026 - check the current factor with the Clean Energy Regulator before signing.
Prices cross-checked against SolarQuotes, Finder, Project Price Point, Solar Decision, WhySolar and GreenLight Solar published pricing, with rebate mechanics per Keystone Energy, October 2026.
A quality 6.6 kW solar system costs $5,000-$6,500 after the federal discount, and a 10 kWh battery adds $7,000-$10,500 after its rebate. All rebate figures on this page are as at October 2026 - the battery rebate now steps down every six months, so treat any undated solar pricing you read (including ours, later) with suspicion.
The biggest drivers are battery size, brand and tier and roof and switchboard. Each one is worked through with prices in the guide above, and the calculator prices them for your job.
Use the free calculator linked from this guide - it prices your job with the same installed ranges used here, in about 30 seconds. It is a guide range, not a quote: your contractor confirms a fixed price after seeing the job.
No - they are researched guide ranges, cross-checked across at least two published sources, not quotes. Prices move with your area, the condition of the site and the scope you choose. Get itemised quotes in writing, and check the tradesperson's licence with your state building authority before you book.
The calculator adjusts for system size, equipment tier, battery size and roof complexity - with the current federal discounts already in the price, as at October 2026.