My Solar Projection

We have been connected to the grid for a whole month now which allows me to make some projections.

Based on the projection calculated by experts for a 9kw system, I have used these figures to calculate our 6.5kw system. Our yield might be slightly lower seeing as we have a 5kw inverter, so it can't put in more than 5kw's at any one time.

I was a bit skeptical of these figures at first but we averaged 30.92 kWh/day of solar production for October, so they could be right.


With a feed in tariff of 11.3c, we should be in credit by $1,160 in a year.

At present we are using an average of 4.9kWh of energy straight from the panels per day. We pay 17.853 (incl GST) per kWh from the grid, so that equates to a saving of about $320 a year.

The cost of the solar system was $10,030 before any rebates were applied (Sept-18). The first rebate was $3,535 and the new Victorian Government incentive is $2,225, though we haven't received the second one yet. This will bring the total cost of our system to $4,270. Based on the above figures we should have the system paid off in less than three years.


After three years, if all tariffs remain the same then the credit will pay for all power from the grid as well as the daily fee, with about $860 credit left over.

We got our first power bill which only had energy feeding back into the grid for half the month and the total bill for power was $10.63. United Energy (the wholesaler) charged $68.73 to reconfigure the meter (which means they clicked a button to allow it to send power back into the grid). This fee will mostly be covered by Tango's welcome incentive of $50 that we will get next month.



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