Solar & Battery Calculator:

Here's what you could save (inclusive of the federal battery rebate)

Discover the impact solar (and, optionally, batteries) would have on your next 4 electricity bills. See how your savings vary by season, based on local weather data. Calculate your overall payback, but also how savings are affected by a battery and solar panels separately – helping you decide if installing batteries is worth it. This estimate includes the federal government's Cheaper Home Batteries Program subsidy, commonly referred to as the federal battery rebate.

How it works

Solar power reduces your bills in two ways:

  • Self Consumption

    When your home is using solar energy instead of the grid.

  • Exporting surplus solar

    for a 'feed-in tariff'

  • Total savings

    This calculator adds these to find your total savings

  • Add a battery

    Adding a battery increases self-consumption by using stored solar energy at night, reducing your power bills even further. But batteries will also extend your payback time.

Change calculator

The advanced version is coming soon, please bear with us.

Solar Savings Calculator

Why Your Postcode Matters

This calculator uses your postcode to:

1. Calculate an estimate of how much sunshine will hit your solar panels.

2. Change the default values for energy cost, solar feed in tariff and typical bill size.

3. Change the default electricity 'self-consumption' values based on median values for your state.

Please enter a valid postcode

Solar Panels

kilowatts (kW) of panels

This calculator does not model export limits yet. If your system is heavily export limited exported energy will be lower than calculated.

  • North facing

Australian Roof Angles

Most Australian roofs are at either 22º or 15º from horizontal. If you are unsure, just leave it at 22º and you'll get good enough result from the solar calculator.

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Shade effect explained

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Heading to go here

If you have any shade on the panels, I strongly advise you get a proper shade analysis done before getting a quote as described.

What is degradation?

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How is this calculated?

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Inverter FAQ's

What the hell is an inverter?

Selecting A Battery

If you are considering a solar battery and know what model you want, choose that from the calculator list.

If you are unsure what you want, then select 'Generic 10kWh' to get an idea of typical battery savings.

Fully installed after all rebates

Cost Of Electricity Usage

This is how much you pay for every kilowatt-hour (kWh) of electricity you use from the grid. The solar calculator uses typical electricity costs for you area – but you can see what you actually pay on your bill.

Your Electricity Bill

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Annual Electricity Cost

If you get quarterly bills – this is 4 bills. You may pay quite different amounts depending on the season – but a guesstimate here is fine. The calculator default is the average electricity bill for a home in your state.

Please enter this information

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Feed In Tariff

This is how much you can receive for selling excess solar energy back to the grid. The solar calculator uses a realistic value for your area as a default.

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What is self consumption?

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In WA you can not get a Feed in Tariff on systems larger than 6.6 kW (5 kW inverter). So the FiT has been set to zero.

Understood

In VIC you can not get a Feed in Tariff on systems larger than 100 kW. So the FiT has been set to zero.

Understood