Smarter Solar

Payback calculator

See your estimated
solar payback.

Start with your power bill and after-rebate quote.

Your home.

Used to find your solar zone.

4 digits, Australian.

Who's home during the day?

Your system.

Assumes a typical amount of additional overnight charging.

Your quote.

Use the after-rebate price on your quote. Include the battery cost if selected.

Adjust electricity ratesUsing 35c usage · 5c feed-in per kWh

For a more accurate estimate, we encourage you to enter your own electricity rates.

Your estimated payback

Your estimate will appear here.

Add your postcode and check your details, then select See my estimate.

This is an estimate based on your bill, quote and the assumptions below. Your real result depends on your habits, your retailer and your roof. A licensed electrician can confirm it for your home.

Work out your solar rebate Work out your battery rebate

A little more detail

Your estimate,
explained.

See the assumptions behind your result and what could change it.

What assumptions are used?
  • Generation per kW for your zone: 1,150–1,600 kWh per kW per year depending on your zone.
  • Performance factor: A — the real-world discount for inverter losses, heat, dirt and minor shading.
  • Daytime self-consumption: taken from your "who's home during the day" answer — currently a share for "Home some days".
  • Overnight usage share: Part of your total usage happens after daylight — that's the ceiling on how much a battery can offset.
  • Tariffs: editable on this page. The price is your own figure — we don't add or subtract a rebate.

Assumptions current as at 16 July 2026.

Which price should I enter?

Use the out-of-pocket figure on your quote — most quotes already have the rebate taken off. If you've included a battery, make sure its cost is in this total. We don't add or subtract a rebate.

Why does being home during the day matter?

This decides how much of your solar you use directly, versus sell back cheaply. The estimate uses your answer to choose a daytime self-consumption assumption.

What could change my result?

This is an estimate. It's based on your bill and price, plus typical figures for your area — how much solar a system makes, how much you use during the day, and how a battery shifts power to the evening. Your real result depends on your habits, your retailer and your roof. We show the full working so you can check it, and a licensed electrician can confirm it for your home.

For a more accurate estimate, we encourage you to enter your own electricity rates.