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Best Energy Upgrades for South Australia Homes in 2026

Based on a typical 3-bedroom home in South Australia · Updated June 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: 6.0c/kWh
Gas: 6.0c/MJ
Gas usage: ~13,508 MJ/year
Electricity usage: ~6,946 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

Draught Sealing

Pays for itself in 4.9 years, then saves ~$134/year.

$134
Profit
Net cost
$600
Payback
4.9 yrs
15yr savings
$1,374
2

Solar + Battery

Pays for itself in 4.7 years, then saves ~$3,339/year.

$11,031
Profit
Net cost
$16,368
Payback
4.7 yrs
15yr savings
$54,940
3

Electric Vehicle

Pays for itself in 4.3 years, then saves ~$1,641/year.

$4,458
Profit
Net cost
$9,000
Payback
4.3 yrs
15yr savings
$23,523
4

Heat Pump Hot Water (gas switch)

Pays for itself in 4.4 years, then saves ~$680/year.

$3,296
Profit
Net cost
$3,175
Payback
4.4 yrs
15yr savings
$13,680
5

Induction Cooktop

Pays for itself in 2.7 years, then saves ~$220/year.

$3,504
Profit
Net cost
$1,500
Payback
2.7 yrs
15yr savings
$10,574
6

Smart Home Energy Management

Pays for itself in 4.6 years, then saves ~$187/year.

$1,107
Profit
Net cost
$2,000
Payback
4.6 yrs
15yr savings
$6,378

Portfolio summary

$32,643
Total investment
$110,470
Total savings (15yr)
$23,531
Net profit

Below market returns at this time horizon

These upgrades still save money on energy bills, but the return doesn't beat the 10% stock market benchmark over 15 years. They may become worthwhile with a longer holding period.

Insulation
Below benchmark by $240
Battery (add-on)
Below benchmark by $5,388

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, Draught Sealing is the highest-return upgrade with a net profit of $134 over 15 years and a payback period of 4.9 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 $110,470 over 15 years, with a total investment of $32,643 and a net profit of $23,531.
What electricity rate does South Australia pay in 2026?▾
We modelled South Australia homes at 43c/kWh with a feed-in tariff of 6.0c/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. Draught Sealing, 2. Solar + Battery, 3. Electric Vehicle, 4. Heat Pump Hot Water (gas switch), 5. Induction Cooktop, 6. Smart Home Energy Management. 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