Solar is the most popular home upgrade in Australia right now — and it's also one of the most confusing to price. Quotes can vary by thousands of dollars for the same system size, and most homeowners have no idea whether they're getting value or getting fleeced. Here's what solar should actually cost in 2026 and how to read your quote properly.
Average Solar System Costs in 2026
These are fully installed prices including panels, inverter, mounting, wiring, and meter reconfiguration. Prices include the federal STC rebate (Small-scale Technology Certificates) which is applied at point of sale.
| System Size | Typical Output | Price Range (after rebate) | Best For |
|---|---|---|---|
| 5kW | 18–22 kWh/day | $3,500–$5,500 | Small household, 1-2 people |
| 6.6kW | 24–29 kWh/day | $4,000–$6,500 | Average household, 2-3 people |
| 10kW | 36–44 kWh/day | $7,000–$11,000 | Large household or home office |
| 13kW | 47–57 kWh/day | $9,000–$14,000 | Large home, pool, EV charging |
The most common residential system in Victoria is 6.6kW — this is the sweet spot because it maximises the STC rebate threshold while covering most household usage.
What Should Be in Your Solar Quote
A proper solar quote should include all of the following. If any are missing, ask why.
Hardware:
- Panel brand, model, wattage, and quantity (e.g. "20x LONGi Hi-MO 6 370W")
- Inverter brand and model (e.g. "Fronius Primo Gen24 5.0")
- Mounting system (e.g. "Clenergy tin roof mount" or "tilt frame for flat roof")
- Isolator switches (DC and AC)
Installation:
- Roof mounting and panel installation
- DC and AC wiring
- Switchboard upgrade if required (older homes often need this)
- Meter reconfiguration / smart meter installation
- Connection application to your distributor (e.g. Jemena, AusNet, Powercor in VIC)
Compliance:
- CEC accredited installer details
- Certificate of Electrical Safety (COES)
- STC rebate applied to price
- Grid connection paperwork
Warranties:
- Panel performance warranty (typically 25 years)
- Inverter warranty (5-12 years depending on brand)
- Workmanship warranty (minimum 5 years for CEC installers)
Pricing the Key Components
Understanding component costs helps you spot markup:
| Component | Budget | Mid-Range | Premium |
|---|---|---|---|
| Panels (per panel) | $100–$150 | $150–$220 | $220–$350 |
| Inverter (5kW string) | $800–$1,200 | $1,200–$2,000 | $2,000–$3,500 |
| Inverter (micro/optimisers) | — | $2,500–$4,000 | $4,000–$6,000 |
| Battery (per kWh) | — | $800–$1,200 | $1,200–$1,800 |
| Mounting system | $300–$500 | $500–$800 | $800–$1,200 |
| Installation labour | $1,000–$1,500 | $1,500–$2,500 | $2,500–$4,000 |
Panel brands by tier:
- Budget: Trina, JA Solar, Canadian Solar — solid manufacturers, good warranties
- Mid-range: LONGi, Jinko, REC — excellent performance-to-price ratio
- Premium: SunPower, LG (discontinued new), Q Cells — highest efficiency, longest warranties
Inverter brands:
- Fronius, SMA, Huawei — the three most trusted brands in Australia
- Enphase — micro-inverters, more expensive but better for shaded roofs
- Sungrow, GoodWe — budget-friendly, decent quality
Red Flags in Solar Quotes
"Free solar" or $0 upfront schemes — These are Power Purchase Agreements (PPAs) where you don't own the panels. You pay for the electricity they produce, often at rates that aren't much better than the grid. You're locked into a contract and the panels stay with the house if you sell. Usually a bad deal.
No panel or inverter brand specified — "Tier 1 panels" is meaningless without a specific brand and model. Over 200 manufacturers are classified as "Tier 1." Demand exact specifications.
Huge discount from "original" price — "Was $12,000, now $5,999!" is a classic sales tactic. The "original" price was never real. Judge the quote on its own merits.
Pressure to sign today — "This price is only available until Friday" is standard high-pressure sales. A legitimate installer will honour a quote for 30 days.
Missing switchboard upgrade — If your home has an older switchboard without a safety switch or spare circuit breakers, you'll need an upgrade ($800–$2,000). If the quote doesn't mention this and your house was built before 2000, ask specifically.
Extremely low price — A 6.6kW system for under $3,500 (after rebate) is likely using bottom-tier components, cutting corners on installation, or the installer won't be around for warranty claims.
The Victorian Solar Rebate
As of 2026, the Victorian Government's Solar Homes program offers rebates up to $1,400 for solar panel systems. Eligibility requires a combined household income under $210,000, property value under $3 million, and CEC-approved installer and components. This is in addition to the federal STC discount.
Check the Solar Victoria website for current eligibility and availability — the rebates are released in batches and can run out.
Battery Storage: Worth It?
Batteries are getting cheaper but still aren't cost-effective for most Victorian households purely on bill savings. A typical 10kWh battery costs $8,000–$14,000 installed and saves roughly $800–$1,200 per year in electricity costs, giving a payback period of 7-12 years — and batteries typically last 10-15 years.
Batteries make more sense if you have time-of-use tariffs with expensive peak rates, want backup power during outages, or are planning to go fully off-grid.
How to Compare Solar Quotes Properly
When you have multiple quotes, compare them on a cost-per-watt basis:
Total price ÷ total system watts = cost per watt
For example: $5,500 ÷ 6,600W = $0.83/W
In 2026, a fair price per watt for a quality 6.6kW system in Melbourne is $0.60–$0.95/W after the STC rebate. Below $0.55/W suggests corner-cutting; above $1.00/W suggests premium components or overpricing.
Frequently Asked Questions
How long do solar panels last? Modern panels are warrantied for 25 years of performance and typically last 30+ years. Degradation is about 0.5% per year, so after 25 years they'll still produce around 87% of their original output.
Do I need council approval? Generally no, for standard roof-mounted systems. Some heritage overlays or strata buildings may require approval. If you're buying a property in Victoria, check planning overlays with NestCheck before you buy.
How long does installation take? Most residential systems are installed in one day (4-8 hours on roof). Grid connection and meter reconfiguration can take 2-6 weeks after installation.
What's the payback period? A well-sized 6.6kW system in Melbourne typically pays for itself in 3-5 years through reduced electricity bills. After that, it's essentially free power for the next 20+ years.
Got a solar quote? Upload it to TradieTruth for a free instant verdict — or get a premium line-by-line analysis for $9.99 to make sure every component is fairly priced.
Buying a property? Check if there are heritage overlays or building restrictions before committing at NestCheck — free reports for Victorian addresses.