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Best Energy Upgrades for South Australia Homes in 2026

Based on a typical 3-bedroom home in South Australia · Updated October 2026

South Australia has the highest retail electricity prices in Australia, which makes every kilowatt-hour of solar self-consumption extremely valuable. The SA Home Battery Scheme provides interest-free loans of up to $10,000 for eligible homes adding battery storage, and the state's excellent solar conditions mean payback periods are among the shortest nationally.

What we modelled: how we calculated these results

3-bedroom home, ~18 years old
State: SA
Electricity: 43c/kWh
Feed-in tariff: 5.0c/kWh
Gas: 6.0c/MJ
Gas usage: ~13,508 MJ/year
Electricity usage: ~3,940 kWh/year
Analysis period: 15 years

Recommended upgrade sequence

These upgrades are ordered for maximum return. Each step accounts for the energy changes made by previous steps.

1

Electric Vehicle

Pays for itself in 4 years, then saves ~$1,797/year.

$7,459
Profit
Net cost
$9,000
Payback
4 yrs
15yr savings
$26,543
2

Solar + Battery

Pays for itself in 3.8 years, then saves ~$2,642/year.

$13,233
Profit
Net cost
$10,026
Payback
3.8 yrs
15yr savings
$41,298
3

Heat Pump Hot Water (gas switch)

Pays for itself in 4.9 years, then saves ~$592/year.

$5,545
Profit
Net cost
$3,175
Payback
4.9 yrs
15yr savings
$11,904
4

Induction Cooktop

Pays for itself in 5 years, then saves ~$169/year.

$3,580
Profit
Net cost
$2,800
Payback
5 yrs
15yr savings
$10,344

Portfolio summary

$25,001
Total investment
$90,090
Total savings (15yr)
$29,817
Net profit

Below market returns at this time horizon

These upgrades still save money on energy bills, but the return doesn't beat the 8% stock market benchmark over 15 years. They may become worthwhile with a longer holding period.

Battery (add-on)
Below benchmark by $18
Draught Sealing
Below benchmark by $1,098
Insulation
Below benchmark by $2,023

Frequently asked questions about South Australia energy upgrades

What is the best energy upgrade for a South Australia home?▾
For a typical 3-bedroom home in South Australia, Electric Vehicle is the highest-return upgrade with a net profit of $7,459 over 15 years and a payback period of 4 years.
How much can I save on energy bills in South Australia?▾
By following the full recommended upgrade sequence, a typical South Australia home could save $90,090 over 15 years, with a total investment of $25,001 and a net profit of $29,817.
What electricity rate does South Australia pay in 2026?▾
We modelled South Australia homes at 43c/kWh with a feed-in tariff of 5.0c/kWh, based on current SA retail rates. You can adjust these in the calculator to match your actual plan.
What order should I install energy upgrades in South Australia?▾
The optimal sequence is: 1. Electric Vehicle, 2. Solar + Battery, 3. Heat Pump Hot Water (gas switch), 4. Induction Cooktop. Each step is calculated after accounting for the energy changes from previous upgrades, so the order matters.

See what the calculator recommends for your home

These results are for a typical home. Your savings depend on your actual energy usage, roof orientation, and appliance ages.

Run the calculator for your home

Examples for other states

New South WalesVictoriaQueenslandWestern AustraliaTasmaniaAustralian Capital Territory

Related reading

Solar Panels in Australia: Cost and Savings in 2026Home Batteries in Australia: Do the Numbers Actually Stack Up in 2026?Should You Just Ditch Gas Entirely? A State-by-State LookHeat Pump vs Gas Hot Water in Australia: 2026 Numbers