As we get further from winter and the sun comes out more and more, new national research shows that sunshine in Adelaide is putting serious cash back into the pockets of locals. iSelect’s latest solar payback analysis shows that households in Adelaide are among the nation’s biggest winners when it comes to solar savings, with many families pocketing more than $3,000 a year simply by letting their rooftops and the sun do the work. The study compared solar panel prices, government rebates, energy use, feed-in tariffs and Bureau of Meteorology sunlight data across capital cities, and Adelaide’s consistently bright weather helped it towards the top of the leaderboard.
Adelaide leads the nation when it comes to homes using a larger amount of electricity each day, with a typical 6.6kW solar system paying for itself in around two years and nine months. Even medium-usage households sit just behind Perth with a payback period of three years and nine months. To put it simply, Adelaide’s dry, sunny climate means panels generate more power, more often, helping households slash bills faster than those in cloudier cities. And with energy prices sitting at some of the highest rates in the country, every kilowatt of self-produced power is bringing in major returns.
The research also looked at the impact of adding a battery, and again, Adelaide held its own. While the upfront cost is noticeably higher, the long-term return is just as compelling. For low-energy households, the average solar-plus-battery system pays itself off in eight years and six months. For medium users, that falls to just over six years. And for high-energy households, the payback time drops to five years and six months, the fastest battery-assisted payback in the country. With electricity prices in South Australia now topping 45 cents per kWh, storing daytime solar to use at night allows locals to avoid the costliest energy periods, increasing yearly savings even further.
A year after payback, households with solar alone can save around $2,052 annually, while those with a battery can pocket up to $3,109. Even lower-use homes, particularly those opting for battery storage, can still bring in over $2,000 a year once the system has paid itself off. Despite lower feed-in tariffs in South Australia since the introduction of the so-called ‘sun tax’ in July 2025, the shift has only strengthened the case for using or storing solar at home rather than exporting it to the grid.
With rising energy costs and a climate that naturally supports strong solar output, it’s no surprise Adelaide is coming out as one of the best places in Australia to invest in rooftop solar.
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