Find out how much you can save with our Solar Savings Calculator Get 3 Free Quotes Today!

Our Solar Market solar savings calculator can help provide you with a general idea of what size solar system would best suit your home or business based on the information you input into the calculator.

For a more in-depth result, you can select the "Advance" mode of the calculator. Once all of your details are entered, the calculator will present an estimation of how many solar PV panels would be required to meet your regular energy needs, what the system would cost, annual savings to your power bills, the payback period and the return on your investment.

Additionally, you can select to have your savings presented ove one, five, ten or twenty years. After you you've figured out what your total savings would be, click on the orange "Get 3 Quotes" button.

Your Details
Your postcode determines you location and thus the solar radiation your system will receive. It also determines which electricity retailers you can choice from.
Your retailer is important as this determines what you pay for your power from the grid, plus what you’ll be paid for your feed in tariff and the rules surrounding it. You can find out how your current retailer compares to others here
c/kWh
This is determined by which retailer you're with and which state you live in.
This helps determine how much you can save and what your new bill will be with different system sizes.
% / annum We've assumed 5% inflation of electricity prices per annum. Going on the last few years though where some state government’s have increased prices by in excess of 20%, 5% may be a bit conservative.
Solar System Details
1.5kW 3.0kW 7.0kW

This determines the amount of electricity you'll produce and depending on how much power you use in the house while the sun is shining, how much you'll export to the grid.

  • 1.5 kW = approx 8 panels
  • 2 kW = approx 10 panels
  • 3 kW= approx 15 panels
  • 4 kW = approx 20 panels
  • 5 kW = approx 25 panels

The average system size installed in Australia at the moment is around 4kW.

The price automatically populated is the median price in the market at the moment for the selected system size. There may be cheaper systems around which will be of lesser quality or higher quality systems which are more expensive. We recommend paying slightly more for quality, as the system needs to be operating for many years to come in quite extreme weather conditions.

This determines the amount of electricity you'll feed into the grid and be paid the feed in tariff for.

If you want to be more accurate, play around with the feed in percentage in the advanced features. This can never be 100% accurate however so play with the slider and see the affect it has on the financial numbers to determine best and worst case scenarios.

5% 80% 80%

This is the percentage of electricity produced by your system which is exported to the grid and which you'll be paid the feed in tariff for.

If you're home and using power during the day, you'll use the power your system produces first and therefore export less.

If most of the household is at work or school during the day, then you’re export percentage will be higher.

Larger systems will export more than smaller systems.

If you're feed in tariff is less than what you pay for your power, which is the case in most states, then you should try to shift your power usage to the middle of the day rather than evening. This can be done by using washing machines, dishwashers, dryers etc during the middle of the day.

% / annum

This is the percentage of electricity produced by your system which is exported to the grid and which you'll be paid the feed in tariff for.

If you're home and using power during the day, you'll use the power your system produces first and therefore export less.

If most of the household is at work or school during the day, then you’re export percentage will be higher.

Larger systems will export more than smaller systems.

If you're feed in tariff is less than what you pay for your power, which is the case in most states, then you should try to shift your power usage to the middle of the day rather than evening. This can be done by using washing machines, dishwashers, dryers etc during the middle of the day.

System Installation

Orientation has quite a large effect on production. North is optimal and each movement away form north will mean less production.

Roof OrientationProduction Loss
Northno losses
North East/North West7% loss
East/West15% loss
South38% loss
NW NNW N NNE NE ENE E ESE SE SSE S SSW SW WSW W WNW
N

The angle of your roof doesn't massively effect your system's production. To get the best production, your roof should be pitched at the same degrees as the latitude of your location. For example, Brisbane's coordinates are as follows – Latitude 27°25'S – Longitude 153° 9' E

This means that the best roof pitch is 27 degrees which is about what most roofs are.

If your pitch is different to this, don't worry, for every 5 degrees difference from this, you lose 1% production. So if the panels were laid flat, you’d only lose about 5% production.

25%
Need help determining your roof's orientation?
Click here to lookup your address to see a picture of your roof.
Estimated Annual Electricity Bills (with and without solar)
Without Solar
With Solar
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Calculating...
Estimated Electricity Production
 /yr

This figure can be verified by using tools such as PVsyst or Sunny Design

 /day  
 /yr  
Investment
   
 /yr
Savings on your power bill=(Yearly Production (kWh) - Exported Production (kWh)) X Price of Electricity) +
(Exported Production (kWh) x Feed in Tariff Rate)
 =( - x ) + ( x )
 = /yr
 
Payback Period=System Price / Yearly Benefit
 = /
 = 
 
Return on Investment=System Price / Yearly Benefit
 = /
 = 
Reduced Energy Costs
   
 
Effective price/ kWh after installing solar=(Yearly Power Bill - Yearly Savings on Bills / Average units used per day prior to installing solar
 = - /
 = 
 
Savings per kWh=rice currently paid for power - effective price after installing solar
 =  -  
 = 
Savings on Electricity Bills
 
 
 
Close

 

Important: This calculator does not constitute financial advice. While we've provided all of the equations behind the numbers presented plus links to sources of radiation data, The Quote Company does not take any responsibility for financial decisions made as a result of using this calculator. We recommend submitting your details to get 3 free no obligation quotes and then discussing the results further with solar providers.

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