John,
a question in my mind might be the possibility that the buy back rate (by synergy), which I think is currently 47c per unit for the ten years after you purchase, might be reduced significantly as I think it has in NSW - to something like 7c. This would impact severely on the time it will take for the system to pay for itself. But you would still be embracing all the 'green' advantages if that's what appeals to you.
How many panels were you thinking of having?
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