Is solar worth it in South Australia in 2026?
Short answer: it depends far more on when you use power than on how big your bill is. South Australia buys electricity at about 42c a unit and pays about 1c for what you export, so a unit used as it is generated is worth roughly 42 times one sent back to the grid.
What is different about South Australia
South Australia has the most expensive electricity of the 8 at 42c a unit, which raises what every unit you avoid buying is worth, and one of the lowest feed-in tariffs at 1c, so exporting is close to giving power away and self-consumption carries the entire case. It averages 5 peak sun hours a day.
What it costs, and what it saves
Four households, panels only, no battery, unshaded roof, someone home part of the day, after every rebate that applies in South Australia. The bill column is what that household actually pays at 42c a unit, which is why the same house has a different bill in every state.
| Household uses | Their bill a quarter | System | After rebates | Saves a year | Pays for itself |
|---|---|---|---|---|---|
| 10 kWh | $482 | 6.6kW solar | $6,250 to $8,250 | $480–$730 | 10+ years |
| 15 kWh | $673 | 10–13kW solar | $8,000 to $13,000 | $740–$1,120 | 9–10+ years |
| 22 kWh | $941 | 10–13kW solar | $8,000 to $13,000 | $1,030–$1,540 | 6–10 years |
| 30 kWh | $1,247 | 10–13kW solar | $8,000 to $13,000 | $1,360–$2,030 | 5–8 years |
Produced by this site's calculator. Not a quote, and your roof will move these.
The number that actually decides it
Take the middle household, 15 kWh a day. Home most days it saves $940–$1,410 a year and pays back in 7–10+ years. Out at work all day, the identical system on the identical roof saves $580–$870 and takes 10+ years.
Nothing changed except who was home. That is the whole calculation in South Australia, and it is why a quote built on an assumed self-consumption figure can be completely honest about the price and still wrong about the savings.
When it is not worth it
A small household on panels alone often does not recover the spend inside ten years here, and that is with the rebate already taken off. If you use under about 10 kWh a day, are out during the day, and have no plans for an EV or a pool, the honest answer is that the money does less for you on the roof than it does almost anywhere else. Nobody selling solar will lead with that.
Do the free things first
Two things cost nothing and should happen before any hardware. Check you are on a competitive retail offer, because the spread between offers is often worth more than a year of solar savings. Then move what you can into the middle of the day: dishwasher, washing machine, pool pump, and hot water if you can control it. In a 1c feed-in state that shifting is worth real money on its own.
What about a battery? On the same 15 kWh household, solar with a battery comes to $9,130 to $19,730 after rebates, saves $1,670–$2,120 a year and pays back in 5–10 years. At a 1c feed-in rate, storing a unit is worth far more than exporting it, which is what makes storage add up here even though it costs more upfront.
$5,000 difference.
That is the gap between two quotes for the same 6.6kW system in South Australia, in the same week. Not build quality, not a better job. Overheads, how full the diary is that month, and what the person at your kitchen table thinks you will agree to. On solar with a battery the same gap is $10,600.
Closing that gap is what I do. I already know what installers in your area are quoting this month for this equipment, so I get you the bottom of that range for the same system other companies charge thousands more for. It costs you nothing. The installer pays me, and only if you go ahead, which is why there is no reason for me to push you at a bigger system than you need or at a dearer installer.
Get your own numbers, then get them priced properly
The table above is four example households. Two minutes of questions gets you your system size, what it should cost after rebates in South Australia, and a ten-year projection built on your roof and your usage. Then I find the bottom of that price range for you.
Run my numbers, freeNo installer buys placement or ranking here, and nothing reaches an installer unless you ask.
Common questions
Is solar worth it in South Australia?
For a household using around 15 kWh a day and home part of the day, a 6.6kW system in South Australia costs $8,000 to $13,000 after rebates, saves $740–$1,120 a year and pays for itself in 9–10+ years. A smaller household that is out all day often does not recover the spend inside ten years on panels alone.
What is the feed-in tariff in South Australia?
About 1c a kWh, against roughly 42c to buy power back. That gap is around 42 times, so power used as it is generated is worth far more than power exported.
How much does a 6.6kW solar system cost in South Australia?
$8,000 to $13,000 after rebates for a value-tier install. The spread is the installer's overheads and how busy they are, not the equipment.
What decides whether solar pays off?
How much of the generation is used on site rather than exported. In South Australia the same 15 kWh household saves $940–$1,410 a year if home most days and $580–$870 if out all day.