Why Go Solar on the Sunshine Coast?

For quality-tier equipment — Clean Energy Council approved panels with a 25-year product warranty, paired with a Fronius, fully installed and after the federal STC discount:

• 6.6kW: $7,500 – $8,900
• 8kW: $8,800 – $10,400
• 10kW: $10,200 – $11,900
• 13.2kW: $12,800 – $15,000
• Adding a 13.5kWh battery: $9,500 – $11,500 after the federal battery discount

Budget systems sell for considerably less. On a coastal roof they also tend to fail considerably sooner, which is covered in detail above.

Prices move with roof complexity, storey height and switchboard condition. A site inspection is the only way to get a real number.

For solar alone on the Sunshine Coast, typically 4 to 5.5 years. For solar paired with a battery, typically 7 to 8 years.

Payback is calculated by dividing the installed cost after rebates by the annual benefit — the electricity you no longer buy plus the credit for what you export. On our modelled 25kWh/day household: a 6.6kW system pays back in about 4.4 years, a 10kW system in about 4.6 years, and a 10kW system with a 13.5kWh battery in about 7.1 years.

Those figures assume electricity prices stay flat. They have not stayed flat in any decade since 2000, so real-world payback has historically come in faster than modelled.

The federal solar rebate (Small-scale Technology Certificates) is being phased out and ends on 31 December 2030. It shrinks every 1 January as the deeming period drops by one year, it fell from six years to five on 1 January 2026, which cost a typical 6.6kW system roughly $400 to $600 in rebate value.

The federal battery discount now steps down every six months rather than annually, in January and July, having fallen from an STC factor of 8.4 to 6.8 on 1 May 2026.

So the practical answer is that waiting has a measurable cost and no offsetting benefit. Panel prices have plateaued after two decades of steep decline, so the equipment is unlikely to get much cheaper while the discount continues to shrink. Every year you wait, you pay more and start saving later.

The federal <strong>Cheaper Home Batteries Program</strong>, which began on 1 July 2025, currently delivers approximately <strong>$250 per usable kilowatt-hour</strong> — around 30% off the upfront cost of an eligible battery. On a 13.5kWh battery that is roughly $3,400 off, applied at the point of sale rather than claimed later.

Key details for 2026:

– The program covers batteries from 5kWh to 100kWh, with no income test.
– From 1 May 2026 the discount tapers by size: the full rate applies to the first 14kWh, a reduced rate from 14 to 28kWh, a smaller rate again from 28 to 50kWh, and nothing beyond 50kWh.
– The STC factor now steps down every six months, in January and July, through to 2030.
– Queensland’s own Battery Booster rebate closed in May 2024 and has not reopened, so the federal program is the only one available here.

Your battery must be paired with solar — new or existing — and installed by an accredited installer using approved equipment.

There is no mandated minimum feed-in tariff in the Energex network area, which covers Brisbane, the Gold Coast and the Sunshine Coast up to Noosa. Retailers set their own rates and they typically land between <strong>4 and 8c/kWh</strong> in 2026, with some headline offers reaching 10 to 13c.

Before chasing a high number, check two things:

<strong>The daily cap.</strong> Most high feed-in plans only pay the headline rate on the first 5, 10 or 14kWh exported per day, then drop to 1 to 3c. A 13c rate capped at 5kWh/day is worth less to most solar households than an uncapped 8c rate.

<strong>The import rate.</strong> Retailers offering the highest feed-in tariffs often charge more for the electricity you buy. Since you buy far more than you export, that trade is usually a loss.

Compare full plans on the Australian Energy Regulator’s Energy Made Easy site rather than comparing feed-in rates in isolation. And bear in mind that the more you self-consume, the less the feed-in rate matters at all.

Queensland’s legacy 44c/kWh Solar Bonus Scheme, available to systems connected before 10 July 2012, expires on 30 June 2028. There is no extension planned.

After that date, those households will receive whatever standard feed-in tariff their retailer offers — typically 4 to 8c. That is a reduction of more than 80% in export value, arriving all at once.

If you are on the legacy tariff, three things are worth doing well before 2028. First, understand that most Solar Bonus systems are small (1.5kW to 3kW) and were deliberately designed to export everything, which is exactly the wrong design for the post-2028 world. Second, note that expanding or upgrading your system before that date will forfeit the 44c rate, so timing matters. Third, plan the replacement system around self-consumption and storage rather than export.

We have helped a number of Sunshine Coast households map this transition. It is worth doing with a calendar in front of you.

It depends on when you use electricity and what you want from the system.

Solar alone pays back faster — around 4 to 5 years versus 7 to 8 with a battery. If your household is out during the day and your usage is concentrated in the evening, solar alone will still cut your bill substantially but a large share of your generation will be exported at 5c.

Adding a battery lifts self-consumption from roughly 50 to 66% up to over 90%. On our modelled household, that takes the annual bill from around $970 down to around $320. It also provides blackout backup, which on the Sunshine Coast during storm season is a real consideration — with a decent solar array and a battery, a well-managed household can ride out a multi-day outage.

The 2026 factors that favour batteries: feed-in tariffs are low and falling, evening peak pricing is spreading, the federal discount is still substantial, and from 1 July 2026 the Solar Sharer Offer lets you charge a battery on free midday electricity and discharge it through the expensive evening peak.

A battery is typically expected to last 10 to 15 years, so over the 25-year life of quality panels you would plan for one replacement — much like an inverter.

Yes, and there is now hard sales data rather than survey opinion.

Property analytics firm Cotality analysed more than six million Australian homes and found that homes with rooftop solar sold for an average premium of 2.7%, or about $23,100, holding all other attributes constant. Regional uplift ranged from roughly 1.6% to 6.9%. Batteries were not included in that analysis, so it is a conservative baseline for a modern solar-and-storage home.

To capture the premium, keep your paperwork: the installation certificate signed by your accredited installer, warranty documentation for the panels and inverter, and monitoring data showing what the system produces. Buyers and their advocates increasingly ask for it, and a documented name-brand system is far easier to value than an anonymous one.

The right size is determined by when you use electricity, not just how much.

For a typical Sunshine Coast household using around 25kWh a day, 6.6kW to 10kW is usually the sweet spot without a battery. Going larger keeps adding generation, but if that extra output is exported at 5c rather than used at 32c, the additional return is small — in our modelling, moving from 10kW to 13.2kW adds only about $350 a year.

Go larger when: you have or plan to have an electric vehicle, a pool, ducted air conditioning, a heat pump hot water system, or a battery. Any of those raises the ceiling on how much you can genuinely self-consume, and the maths changes completely.

Also worth checking before you size anything: your switchboard capacity, whether your property is single or three phase, and the export limit Energex will apply to your connection.

Quality panels are built for 25 years or more. The critical distinction when comparing quotes is between two different warranties:

• Product warranty: covers manufacturing defects and physical failure. This is the one that matters. Budget panels commonly carry 10 to 12 years. REC Alpha panels carry 25 years.
• Performance warranty: guarantees the panel still produces a stated percentage of its rated output after a set period — typically around 90% at 25 years for premium panels. Almost every brand offers a long performance warranty, which is why it is a poor way to tell them apart.

Inverters are the shorter-lived component. Expect 10 to 15 years from a high-quality unit and budget for one replacement across the life of the system. Batteries are similar at 10 to 15 years.

One caution: a warranty is only as good as the company standing behind it. A number of solar brands and installers that were active in Australia five years ago no longer trade, which makes their warranties unenforceable. Ask how long both the manufacturer and the installer have been operating.

A quality 165W panel cost around $1,500 in 2006 — about $9.10 per watt. Today a premium 440W panel costs a small fraction of that, and installed systems sit near $0.95 to $1.15 per watt before rebates.

Four things drove the decline: enormous growth in global manufacturing volume (manufacturing cost typically falls around 20% each time production doubles), better cell technology lifting panel efficiency from 13 to 14% up past 22%, falling soft costs as installation times shortened from around 16 hours to 4 to 8 hours, and sustained government incentives creating stable demand.