How Much Does a Solar System Cost in 2026?
Real installed prices for residential solar PV in Australia in 2026 — by system size, state, and after STC rebates and feed-in tariffs. Sourced from Clean Energy Council, SunWiz, AER, and hipages.
For an Australian household in early 2026 the installed price of residential solar PV sits at AUD $850 to $1,250 per kW after the Small-scale Technology Certificate (STC) rebate, or roughly $5,950 to $8,750 for a 7 kW system out of pocket. Before the STC point-of-sale discount, the same 7 kW install would price at $9,800–$12,500.
Australia is the cheapest residential solar market in the OECD on a $/kW basis. The combination of a federal STC scheme that runs to 2030 (deeming period falls one year annually), a competitive CEC-accredited installer market with thin margins, and bulk equipment imports from Tier 1 manufacturers via Adelaide and Brisbane container ports, keeps prices well below US and UK levels. The headline numbers below come from SunWiz Q1 2026 Australian PV Market Report, cross-checked against Clean Energy Council installer surveys and hipages job-quote data.
The 2026 baseline — $850–$1,250/kW after STC
For a cash purchase, post-STC, including CEC-accredited installer labour, panels, string inverter, racking, isolators, and grid connection paperwork:
| System size | Median post-STC price | Annual generation (Sydney, north-facing 22° tilt) |
|---|---|---|
| 5 kW | $5,250 | 7,300 kWh |
| 6.6 kW | $6,400 | 9,600 kWh |
| 7 kW | $6,800 | 10,200 kWh |
| 10 kW | $9,400 | 14,500 kWh |
| 13.2 kW | $12,000 | 19,200 kWh |
The 6.6 kW size remains the most-installed configuration because it pairs with a 5 kW inverter (the threshold above which DNSP export limits begin to bite in NSW, QLD, VIC, and SA). 13.2 kW is the most common single-phase inverter ceiling.
STC rebate — how the federal incentive works
STCs are tradeable certificates created when an accredited system is installed. Each STC equals 1 MWh of estimated generation over the deeming period (5 years remaining as of 2026, dropping to 4 in 2027). For a 6.6 kW system in Sydney (Zone 3), the STC count is roughly 53 certificates × the spot market price (around $35–$38 in Q1 2026) = $1,855–$2,000 off the headline price at point of sale.
Critically, the STC value declines every January. A 6.6 kW system that earned $2,400 of STC discount in 2024 only earns roughly $2,000 in 2026 and will earn $1,500 in 2027. The scheme fully sunsets on 31 December 2030.
State-by-state median prices
Aggregated from SunWiz Q1 2026 dealer survey and hipages homeowner-reported quotes:
| State / Territory | $/kW post-STC | 6.6 kW post-STC |
|---|---|---|
| QLD | 880 | $5,810 |
| NSW (Sydney) | 920 | $6,070 |
| VIC (Melbourne) | 950 | $6,270 |
| SA (Adelaide) | 940 | $6,200 |
| WA (Perth) | 970 | $6,400 |
| ACT (Canberra) | 1,020 | $6,730 |
| TAS (Hobart) | 1,150 | $7,590 |
| NT (Darwin) | 1,250 | $8,250 |
QLD remains the cheapest state because it has the highest installer density per capita in the world and the most competitive Tier 1 panel distributor margins. NT and TAS sit at the top of the range due to freight and lower install volumes.
State rebates that stack on top of the federal STC:
- VIC Solar Homes Program: $1,400 panel rebate on systems up to 5 kW for households earning under $210,000, plus an interest-free loan up to $1,400 over four years.
- NSW Empowering Homes: Interest-free loans for solar+battery up to $14,000 (regional) and $9,000 (metro Western Sydney).
- SA Home Battery Scheme: Closed to new applicants in 2024; the SA Government Home Battery Scheme has been replaced with subsidised VPP enrolment.
- ACT Sustainable Household Scheme: Zero-interest loans up to $15,000 for solar+battery+EV charger combinations.
- QLD Battery Booster: $3,000–$4,000 battery rebate (income-tested, capped, currently in renewed round through 2026).
- WA Distributed Energy Buyback: No upfront rebate but mandated minimum DEBS feed-in tariff (2.25c off-peak / 10c peak as of Q1 2026).
Use the Solar Panel Tax Credit Calculator to model your specific federal+state stack.
Battery storage in Australia
Around 30% of new residential PV in 2026 ships with battery, up sharply from 14% in 2023 thanks to the Federal Cheaper Home Batteries Program launched mid-2025 (30% off battery installs to 2030). Q1 2026 typical battery prices, post-rebate where applicable:
- Tesla Powerwall 3 (13.5 kWh): $11,500–$14,500 fitted, before federal Cheaper Home Batteries rebate (~$3,400 off).
- Sungrow SBR096 stack (9.6 kWh): $7,800–$9,500 fitted.
- BYD Battery-Box Premium HVS (10.2 kWh): $9,200–$11,000 fitted.
- Sigenergy SigenStor (8 kWh + hybrid inverter combo): $11,000–$13,500 fitted.
- PowerPlus Eco 11.4 kWh (Australian-assembled): $9,500–$11,500 fitted.
Cycle life and warranty (10 years / 60% retention typical) drive long-term economics more than headline kWh price. Use the Solar Battery Bank Sizing Calculator to size against your evening load profile before committing.
Feed-in tariffs by state (Q1 2026)
The retail FiT environment has compressed since 2022. Typical single-rate offers from major retailers:
| State | Typical FiT (c/kWh) | Notes |
|---|---|---|
| NSW | 5.0–7.0 | DMO benchmark removed mandatory minimum 2021 |
| VIC | 3.3–4.9 | ESC minimum FiT 3.3c (2025-26) |
| QLD | 4.0–6.0 | South-east QLD competitive; regional Ergon flat 7c |
| SA | 3.5–5.5 | AER no mandated minimum |
| WA (Synergy/Horizon) | 2.25 off-peak / 10 peak | DEBS scheme |
| TAS | 8.935 | Aurora Energy regulated minimum |
| ACT | 6.0–9.0 | EPC publishes guideline rates |
| NT | 7.674 | Power and Water Corporation regulated |
Most households now extract more value from self-consumption (offsetting 30–40c/kWh import) than from export at 5–7c/kWh. Time-of-use plans paired with battery storage can monetise peak-period (typically 4–9 pm) export at higher tariffs on Amber Electric, Powershop, and Origin’s Solar Boost variants.
Cash, loan, or PPA — 10-year cost view
Same 6.6 kW system in Sydney (post-STC $6,070):
| Path | Year-1 outlay | Year-10 net cost (after savings) |
|---|---|---|
| Cash | $6,070 | -$8,200 (positive return) |
| Green loan, 10-yr 8.49% APR | $0 | -$5,500 |
| Brighte BNPL, 5-yr 0% interest | $0 | -$8,000 |
| Solar PPA (rare — Smart Energy, Sunrun-style models limited in AU) | $0 | -$4,000 |
Brighte and Plenti both offer 0%/low-interest finance over 5–7 years that is widely used in Australia and barely changes the NPV versus cash. Most quotes default to a Brighte plan.
What the headline price excludes
- Switchboard upgrade: $600–$1,500 if your meter board is old or not RCD-protected.
- Tile lifter and Whirly bird removal / ridge-cap repairs: $300–$700 on jobs with terracotta or slate roofs.
- Three-phase upgrade: $4,000–$8,000 if your house is single phase and you want to install over 5 kW inverter capacity export.
- Tree work / solar access: $400–$2,500 to limb shading.
- EV charger circuit installed at same visit: $1,200–$2,500 (Tesla Wall Connector, Ocular IQ, Fronius Wattpilot).
Most CEC-accredited installers itemise these in the quote. Confirm in writing.
Authority sources for Australian pricing
- Clean Energy Council (CEC) — accredited installer register, the Solar Retailers Code of Conduct, and quarterly approved-products list.
- Australian Energy Regulator (AER) — retail offer disclosures, default market offer benchmarks for retail electricity prices.
- SunWiz — quarterly Australian PV Market Report (the industry reference for installed price trends).
- Australian Photovoltaic Institute (APVI) — live installation data and DNSP penetration mapping.
- hipages, Service.com.au, and Solar Quotes — homeowner-quote aggregators that publish median pricing dashboards.
- Clean Energy Regulator — STC registry and SRES compliance data.
How to lock in a fair Australian quote
- Insist on CEC-accredited installer (full accreditation, not just licensed electrician) and CEC-approved panels and inverter — non-CEC product cannot create STCs.
- Get three written quotes from CEC-accredited Approved Solar Retailers; the spread between cheapest and most expensive typically runs $1,500–$3,000 on a 6.6 kW install.
- Verify the panel manufacturer’s local Australian warranty entity — Tier 1 panels with no Australian-incorporated warrantor (some grey imports from 2023–24) are essentially uninsurable.
- Read the inverter warranty closely — Sungrow, Fronius, GoodWe, and Solis all offer 10-year standard product warranties; SMA Sunny Boy is 5+5; Enphase microinverters are 25 years.
- Confirm the installer manages your DNSP grid connection (NSW: Ausgrid/Endeavour/Essential; VIC: Powercor/Jemena/CitiPower/AusNet/United; QLD: Energex/Ergon; SA: SAPN; WA: Western Power; TAS: TasNetworks; ACT: Evoenergy; NT: PowerWater).
Once quotes are in hand, run them through the Solar Panel ROI Calculator and the Solar Panel Payback Calculator to compare lifetime returns. With Australian retail electricity prices forecast to rise 4–6% per year through 2030, a payback period of 4–6 years remains realistic for most south-east coast capitals.