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Best Energy Upgrades for Western Australia Homes in 2026

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

Western Australia's solar resource is exceptional -- Perth consistently records among the highest peak sun hours of any capital city. The Synergy retailer's low feed-in tariff means self-consumption is the primary driver of solar returns, rewarding battery storage and smart load scheduling. Heat pump hot water is also a strong performer given the mild winters and high electricity prices.

What we modelled: how we calculated these results

3-bedroom home, ~18 years old
State: WA
Electricity: 33c/kWh
Feed-in tariff: 3.0c/kWh
Gas: 5.1c/MJ
Gas usage: ~13,534 MJ/year
Electricity usage: ~3,964 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 5 years, then saves ~$1,365/year.

$3,057
Profit
Net cost
$9,000
Payback
5 yrs
15yr savings
$18,499
2

Solar + Battery

Pays for itself in 5 years, then saves ~$2,009/year.

$6,395
Profit
Net cost
$8,307
Payback
5 yrs
15yr savings
$26,020
3

Heat Pump Hot Water (gas switch)

Pays for itself in 6.1 years, then saves ~$519/year.

$4,393
Profit
Net cost
$3,525
Payback
6.1 yrs
15yr savings
$10,414
4

Induction Cooktop

Pays for itself in 9.7 years, then saves ~$142/year.

$628
Profit
Net cost
$2,800
Payback
9.7 yrs
15yr savings
$4,873

Portfolio summary

$23,632
Total investment
$59,805
Total savings (15yr)
$14,473
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.

Draught Sealing
Below benchmark by $1,115
Insulation
Below benchmark by $2,050
Battery (add-on)
Below benchmark by $6,542

Frequently asked questions about Western Australia energy upgrades

What is the best energy upgrade for a Western Australia home?▾
For a typical 3-bedroom home in Western Australia, Electric Vehicle is the highest-return upgrade with a net profit of $3,057 over 15 years and a payback period of 5 years.
How much can I save on energy bills in Western Australia?▾
By following the full recommended upgrade sequence, a typical Western Australia home could save $59,805 over 15 years, with a total investment of $23,632 and a net profit of $14,473.
What electricity rate does Western Australia pay in 2026?▾
We modelled Western Australia homes at 33c/kWh with a feed-in tariff of 3.0c/kWh, based on current WA retail rates. You can adjust these in the calculator to match your actual plan.
What order should I install energy upgrades in Western 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 WalesVictoriaQueenslandSouth 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?