For a household using 24 kWh a day, about $712 a quarter at Queensland's 28c a unit, the calculator puts 10–13kW solar at $7,670 to $12,670 after rebates, and 10–13kW solar + 10kWh battery at $8,800 to $19,400.
I am an advisor, not an installer and not a lead broker. You pay nothing at any point.
See what my home should costA family in a renovated Queenslander, someone home some days, using 24 kWh a day.
A ballpark for one example household, not a quote. The low end of each range is what a competitive installer charges; the high end is a poor quote for the same equipment. Prices are from the same calculator the free assessment uses, with Queensland rates and rebates, and sun hours are its figure for Queensland.
Four real households, run through the same calculator this site uses for an individual report. Panels only, no battery, clean roof, someone home some of the time. Prices are after every rebate that applies in Queensland.
| Household uses | Their quarterly bill | System | After rebates | Saves a year | Pays for itself |
|---|---|---|---|---|---|
| 10 kWh | $355 | 5–6.6kW solar | $5,270 to $7,300 | $430–$640 | 10+ years |
| 15 kWh | $482 | 6.6kW solar | $6,050 to $8,050 | $580–$870 | 8–10+ years |
| 22 kWh | $661 | 10–13kW solar | $7,800 to $12,800 | $910–$1,360 | 7–10+ years |
| 30 kWh | $865 | 10–13kW solar | $7,800 to $12,800 | $1,110–$1,660 | 6–9 years |
The bill column is what that household actually pays in Queensland at 28c a unit, which is why the same house has a different bill in every state. Savings depend on how much of the generation gets used on site rather than exported, and at 2.5c a unit for exports that is the number that decides the answer. A household out all day saves less than the figures above; one home most days saves more. Every figure is produced by the calculator, not written down, so it moves when the published rates move.
Ashgrove is hilly, leafy and well-off, with renovated Queenslanders on steep streets. The hills decide which way roofs face, the trees decide how much winter sun they get, and the renovations often decide where the switchboard ended up.
Your retailer sells you the power. Your distributor owns the poles and wires, and it is the distributor that decides how much solar you may send back to the grid. Ashgrove is on Energex's network, which covers Brisbane, the Gold Coast, the Sunshine Coast and surrounds[1], so Energex's rules are the ones a quote here should be designed to.
Static or dynamic. Energex's connection policy for 2025 to 2030, approved by the Australian Energy Regulator, offers dynamic connections, where the export limit moves with what the local network can take, and says Energex will not impose a zero export limit on a site with a suitable dynamic response system[2]. Separately, any new or replacement system of 10kVA or more must have a generation signalling device, which lets the network switch it off briefly in a statewide energy emergency, only at the market operator's direction; as of May 2026 it had never been used[3].
Time-of-use is becoming the default. The same 2025 decision approved Energex moving small customers onto default time-of-use network tariffs, with a peak window and a cheaper "solar soak" window[4]. Your retailer decides how that shows up on your plan, but on a plan where evening power costs more, what a battery saves goes up. Exports earn only a few cents, so size the array to what the house uses, not to the size of the roof.
At the 2021 Census, 77.3% of occupied homes in Ashgrove were separate houses and 45.8% had four or more bedrooms. 40.5% were owned with a mortgage, and the median weekly household income was $2,874.[5]
Big renovated houses on hillsides, under established trees.
Things worth knowing before an installer walks the roof:
All of that describes the area, not your house. Two homes on the same street can be completely different jobs. Put your address in and the assessment works off the actual property rather than a town average.
On a hillside street, the best roof plane may face east or west rather than north. That is not a problem, and west-facing panels make more of their power in the late afternoon when a household is home. It should be designed, though, from the roof you actually have, with the trees and the hill modelled rather than assumed.
Access is the other hill cost. A roof that is two storeys above the ground on the low side can need scaffolding or extra safety equipment, which is a fair line on a quote.
South-east Queensland gets severe summer storms, and hail is the risk a panel quote rarely mentions. Panels certified to IEC 61215 are hail-tested to a set standard, which is the minimum to ask for. Then check that your home insurance covers the panels, the inverter and a battery, and tell your insurer once they are installed.
These are examples, not an average for Ashgrove. They are picked to show how the answer moves for the kinds of household the census shows are common here. Clean roof, no shading, Queensland rates and rebates, and the battery prices assume it is installed before the federal battery discount steps down on 1 January 2027.
| Option | System | After rebates | Saves a year | Pays for itself |
|---|---|---|---|---|
| Change plan and cut waste first | No system | $0 | $140–$430 | Nothing to pay back |
| Solar panels only | 10–13kW solar | $7,670 to $12,670 | $960–$1,440 | 7–10 years |
| Solar plus a 10kWh batteryPays back fastest | 10–13kW solar + 10kWh battery | $8,800 to $19,400 | $1,550–$2,240 | 5–10 years |
| Solar plus a 15kWh battery | 10–13kW solar + ~15kWh battery | $11,040 to $22,040 | $1,830–$2,460 | 5–10 years |
Solar plus a 10kWh battery. It pays back fastest of the options open to you, which is the only measure here that accounts for what the thing actually costs. Solar plus a 15kWh battery takes more off the bill, about $275 a year more, for more capital up front. If keeping the lights on through an outage matters to you, that is the trade you are actually being offered, and it is a reasonable one.
Before any of it: get onto a competitive retail offer. It costs nothing, it takes an afternoon, and on a bill your size it is worth roughly $140 to $430 a year. Every payback below gets shorter once you are paying less per kWh, so it is worth doing first either way.
| Option | System | After rebates | Saves a year | Pays for itself |
|---|---|---|---|---|
| Change plan and cut waste first | No system | $0 | $90–$260 | Nothing to pay back |
| Solar panels only | 6.6kW solar | $5,960 to $7,960 | $530–$790 | 9–10+ years |
| Solar plus a 10kWh batteryPays back fastest | 6.6kW solar + 10kWh battery | $7,540 to $15,440 | $1,050–$1,370 | 6–10+ years |
Solar plus a 10kWh battery. It pays back fastest of the options open to you, which is the only measure here that accounts for what the thing actually costs.
Before any of it: get onto a competitive retail offer. It costs nothing, it takes an afternoon, and on a bill your size it is worth roughly $90 to $260 a year. Every payback below gets shorter once you are paying less per kWh, so it is worth doing first either way.
"Pays for itself" is the range between a competitive quote and a poor one for the same equipment, and 10+ means not inside ten years. The battery ranges are wide for the same reason. Your own usage, roof and timing will move every figure here, which is what the free assessment works from.
Applied by the installer as a discount on the quote, not something you claim. It scales with system size: on the 10–13kW solar in the first example above the calculator counts $2,330. It falls a little each year until the scheme ends in 2030.
There is no Queensland Government rebate on solar panels or batteries for people who live in their own home. There is one for landlords: Supercharged Solar for Renters pays up to $3,500 towards solar on an eligible rental property, open since 12 December 2025[6]. The property must be a house, duplex, townhouse or granny flat rented for $1,000 a week or less and individually metered, the tenant has to consent, and the landlord needs conditional approval before anything is installed[7].
The federal Cheaper Home Batteries Program applies in Queensland. On a 10kWh battery the calculator counts $2,520. The rate is set by the date the battery is installed, not when you order it, and it steps down on 1 January 2027 and every six months after that[8]. Larger batteries earn less per extra kWh: the full rate applies to the first 14kWh.
South-east Queensland's electricity market has been deregulated since July 2016, so retailers set their own feed-in tariffs; the Queensland Competition Authority monitors them but does not set them[9]. The calculator assumes an indicative 2.5c a unit, a little below the last average the QCA published, because offers have been falling and some plans pay nothing[10]. Check your own retailer's rate. Either way, every example on this page is decided by how much power the house uses itself.
The full breakdown, with dates, is in Queensland solar rebates explained.
Already holding a quote? This is how I read one, line by line.
For the first example household on this page, 24 kWh a day, the calculator puts 10–13kW solar at $7,670 to $12,670 after Queensland rebates, and 10–13kW solar + 10kWh battery at $8,800 to $19,400. The range is the gap between a competitive installer and a poor quote for the same equipment. Your own figure depends on your usage and roof, which is what the free assessment works out.
Energex. It is on Energex's network, which covers Brisbane, the Gold Coast, the Sunshine Coast and surrounds. Energex sets your export limit when your installer applies, not your retailer, and offers dynamic connections where the limit moves with network capacity. Systems of 10kVA or more also need a generation signalling device. Ask your installer what limit has been approved before you sign.
Often. They make a little less over a year than north-facing panels, but more of it in the morning or late afternoon, when a household is home and using power. On a hillside street that is often the roof you have, so design to it.
The installer, and only when a job completes. Never the homeowner. No installer can buy placement, and nothing about you reaches one until you ask me to make the introduction.
About a minute. You get the system size, what it should cost, and what it saves. No one calls you unless you ask.
Start My Free CheckIndependent explainers on the parts of this that actually change the answer.
Prices, savings and paybacks come from this site's calculator, using Queensland rates verified 2026-08. Everything else is from the sources below, read on the date shown. Rules and rebates change, so check the source before you rely on one.