Firstly, it is very simple to work out how much you’re entitled to when buying a solar power system. To work out what solar rebate your proposed system will bring you can simply jump on the REC registry website HERE and run a few sums.
The STC price as of today (14 March 2019) the spot price is around $37, or $630 per kW installed. So, from here the math is simple:
If you want a 5kW solar power system then you would get $3,150 off the total cost of an installed system in subsidies (5 x $630).
The bigger the system the larger the rebate based on this equation:
Cost of an installed 30kW solar power system in 2019: $48,900 STC Subsidy: $18,900 Discounted Cost you actually pay: $30,000
If you are unsure what size solar power system your home or business may need you can find some pointers by reading through THIS explanation.