SOLAR BATTERY CALCULATOR

Solar battery calculator

Get accurate cost, savings, bill comparison and payback results for adding a new battery to an existing solar system.

What’s your postcode?

Enter your postcode so that we can locate the nearest weather station to your area. 1 / 5
Solar Battery Calculator

What is your household daily electricity usage?

Estimate your daily electricity usage in Kilowatt hours (kWh) e.g. 16. 1 / 5
Solar Battery Calculator

What is the size of your existing solar panel system?

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Tell us the size of your existing solar panel system in kW e.g. 6.6. 1 / 5
Solar Battery Calculator

What percentage (%) of electricity do you use between 8am and 6pm?

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Estimate how much electricity you use during daylight hours as a percentage (%). 1 / 5
Solar Battery Calculator

What is your desired battery size?

10 kWh

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Tell us the size of the battery you wish to install. 1 / 5
Solar Battery Calculator

What's the angle of your roof pitch?

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Estimate the pitch of the roof that your existing solar panels occupy. 1 / 5
Solar Battery Calculator

What's your roof orientation?

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Tell us which direction your existing solar panels face. 1 / 5
Solar Battery Calculator

Do you want to finance your solar system?

Tell us if you plan to finance your battery purchase as it will increase the cost and payback period. 1 / 5
Solar Battery Calculator

Almost there

Add Advanced options

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You can view and edit the advanced options as required. 1 / 5
Solar Battery Calculator

Your results

These are the options that will mostly impact your savings. Change these options to better suit your needs.

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First year savings $0,000 Payback period 0.0 years
  • iconLifetime battery savings$0,000
  • iconSolar battery cost $00
  • iconReturn on investment 0.0%
  • iconAssumed Warranty $00
Tonnes of CO2 emissions saved $00
  • iconTrees planted 00,000
  • iconCars off the road (one year) 00
  • iconOffset carbon footprint (people in one year) 0.0
Battery powered $000.0
  • iconSolar powered00
  • iconFed back into grid0.0
  • iconDaily solar production 00,000
  • $2500 gfghfghfgh
  • $2500 gfghfghfgh
  • $25114 Demo
Disclaimer

This solar battery calculator is indicative only. It is provided to give an estimate only and general guide of the potential savings, costs and benefits of installing a solar battery. You can read the full calculator disclaimer here.

How it works?

If you don't know the answer, use the default input. The calculator displays financial, emissions and electricity bill comparison results for existing solar panel owners considering adding a battery.

What we’ll ask from you:
  • What’s your postcode?
  • What is your household electricity usage?
  • What size is your existing system?
  • When do you use your electricity?
  • What size battery do you want to install?
  • What is the pitch of your roof?
  • Which direction does your roof face?
  • Do you want to finance your purchase?
  • Do you want to see the advanced options?

Variables affecting solar storage

Solar storage is potentially a great option for existing solar panel owners. The financial viability of the battery will depend on your individual circumstances, for example: the size and generation capacity of your current solar system, the amount of electricity you use and your usage habits during daylight hours.

The Australian population uses more electricity during the peak morning and evening periods. Depending on the season, your solar system is not likely to be producing energy during these periods. So you have to purchase it from the grid.

The economics behind solar storage

The vector image shows a solar battery with a two arrows circling it. Below it a piggy bank reflects savings versus a calendar that indicates longevity. Text reads 'Solar battery economics: savings vs longevity'.

At the heart of the solar storage equation is what happens with the excess solar energy you produce during daylight hours. For solar panel owners that do not have a storage solution, any excess power is fed straight back into the grid, where your retailer will pay you a financial credit per kWh. Then at night when you need to purchase power from the grid, your retailer will then sell it back to you at a higher rate; the greater the difference between these two rates the more viable buying a battery is. However, in recent years, higher feed-in tariffs means that adding a battery isn’t as attractive as it once was.

However, in recent years, the disparity between the buy back rate and the cost of electricity has remained stable, despite rising electricity costs; meaning that solar batteries are only economically viable in some cases.

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