If you’ve been getting quotes for solar in Brisbane, you’ve probably noticed the prices vary wildly. A 6.6kW system quoted at $4,500 from one company and $9,800 from another. What’s going on?
This guide breaks down what solar actually costs in Brisbane in 2026, what drives the price differences, and how to know if you’re getting a fair deal.
The Short Answer
A quality 6.6kW solar system installed in Brisbane typically costs $5,500–$8,000 after the federal STC rebate. A 10kW system runs $8,000–$11,000 and a 13kW system $10,000–$14,000.
If you’re being quoted significantly less than these ranges, ask hard questions about the panel and inverter brands. If you’re being quoted significantly more, you’re likely overpaying.
What’s Included in the Price
A complete solar installation includes:
- Solar panels — the modules on your roof
- Inverter or microinverters — converts DC power from panels to AC for your home
- Mounting hardware — rails and clamps to attach panels to your roof
- AC and DC cabling — from panels to inverter to switchboard
- Switchboard work — isolators, protection devices
- Grid connection — Energex approval and paperwork
- Installation labour — typically one to two licensed electricians for a full day
- Monitoring setup — so you can see what your system is generating
The Federal STC Rebate
The Small-scale Technology Certificate (STC) scheme is a federal government rebate that significantly reduces the upfront cost of solar. In 2026, the rebate for a 6.6kW system in Brisbane is approximately $1,700–$1,850.
How it’s calculated: Brisbane sits in Zone 3 with a rating factor of 1.382. A 6.6kW system generates roughly 45 STCs (6.6 × 1.382 × 5 remaining deeming years). At the current STC spot price of ~$38–40 each, that’s approximately $1,710–$1,800. STC prices fluctuate slightly with market trading.
This rebate is automatically deducted from your quote — you never see the gross cost. The scheme ends in 2030, so the rebate reduces each year as fewer deeming years remain.
What Affects the Price
Panel brand and quality Tier 1 panels from manufacturers like GoodWe, Trina Solar, Jinko and Winaico carry longer warranties and are manufactured with tighter quality control. Budget panels may save $300–500 upfront but often underperform and cause headaches with warranty claims.
Inverter brand String inverters (one inverter for the whole system) are the most common and most affordable. Microinverters (one per panel) cost more but perform better in shaded conditions or complex roof orientations.
Roof type and complexity A single-pitch tin roof with easy access is quicker and cheaper to install on than a multi-level tile roof with restricted access. Scaffolding requirements, steep pitch and multiple roof faces all add to labour costs.
System size Larger systems cost more but the per-watt price drops as you scale up. A 13kW system doesn’t cost twice as much as a 6.6kW system.
Switchboard condition If your switchboard is old or doesn’t have a suitable main switch, it will need to be upgraded before solar can be safely connected. This adds $500–1,500 to the job but is non-negotiable for safety.
How to Avoid Getting Ripped Off
Get at least three quotes. Not from comparison sites that sell your data — from local installers who will actually do the work.
Ask for the panel and inverter model numbers. Look them up. If the quote just says “Tier 1 panels” without specifying the brand and model, be cautious.
Check the installer’s licence. In Queensland, all solar installations must be performed by a licenced electrician with SAA (Solar Accreditation Australia) accreditation. Ask for their licence number and check it.
Don’t chase the cheapest quote. The solar industry has a long tail of installers who win on price and cut corners on installation quality, panel selection or warranty support. A system that fails or underperforms in year three is not a bargain.
Ask who does the installation. Some companies quote and then subcontract the work to whoever is cheapest that week. Know who is going on your roof.
Is Solar Worth It in Brisbane in 2026?
Yes — for most Brisbane households with a quarterly electricity bill over $400, solar delivers a payback period of 4–7 years and 25+ years of generation. Brisbane’s irradiance is excellent, electricity prices have risen significantly, and the rebate is still in place.
The question isn’t really whether solar is worth it. It’s whether you’re getting the right system at a fair price.
High Energy is a licensed Brisbane electrician and SAA accredited solar installer servicing South East Queensland. We provide detailed written quotes with no obligation — including savings modelling against your actual energy bills. Get in touch for a free assessment.