Western Australia Solar Savings Calculator

Western Australia uses the Synergy retailer with a Distributed Energy Buyback Scheme (DEBS) feed-in rate of approximately 2.25–10c/kWh depending on time of export. Usage tariffs average 31c/kWh. A 6.6kW system in WA generates approximately 27–31 kWh per day.

Solar Savings Calculator

Estimate your annual solar savings and payback period by state

A typical 6.6kW solar system in NSW generates around 9,000 kWh per year and saves approximately $1,800–$2,200 annually depending on your electricity usage and feed-in tariff. Payback periods are typically 4–7 years in most Australian states. Source: Clean Energy Council, 2025–26.
Estimated annual savings$1,178.90
Usage savings (annual)$1,008.17
Feed-in tariff income (annual)$170.74
Estimated payback period6.8 years

Estimates based on average state tariffs and 4.5 peak sun hours/day. Actual savings vary.

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Frequently Asked Questions

How much can I save with solar panels in Australia?

The average Australian household with a 6.6kW system saves between $1,500–$2,500 per year on electricity bills, depending on their state, usage patterns, and feed-in tariff rate. Systems typically pay for themselves in 4–7 years.

What is a solar feed-in tariff?

A feed-in tariff (FiT) is the rate your energy retailer pays you for excess solar electricity you export to the grid. Rates vary by state: QLD offers the highest (around 6.5c/kWh) while WA's Synergy offers around 2.25c/kWh.

How long does it take for solar panels to pay for themselves?

In Australia, a typical 6.6kW solar system costs $7,000–$10,000 installed and pays for itself in 4–7 years, depending on your state, electricity usage, and how much solar you self-consume vs export.

What size solar system do I need?

A typical Australian household uses 15–25 kWh per day. A 6.6kW system (the most popular size) generates around 26–30 kWh/day in most states, covering most household consumption. Larger households or those with EVs or pools should consider 10kW+.

Does location affect solar output?

Yes significantly. Queensland and Western Australia receive the most solar radiation (5.0–5.5 peak sun hours/day), while Tasmania and Victoria receive less (3.5–4.5 hours). This calculator uses 4.5 hours/day as the Australian average.