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O.T Carbon Tax v's PV ecomonic? but for who 16-Aug-2011 At 9:13:26 AM lacto

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My PV array has just turned out 20,000kwh or a saving of 26 tonnes of carbon at $23 per tonne is $598of saving.
The whole system cost me around $36000 nett and has since been largerly depreciated against tax . With premium feed back (66 cent /kwh)and consumption it is returning around $3800 per year for a simple return of around 10.5% or 15+ after the tax situation.
A SIMILAR 4.95 KW ARRAY just installed for todays prices of $14000 will generate around 7500 to 8000kwh p.a or 10 tonne of carbon or $230 .
return on electrcity depends on the tarriff but minimal rate is 23.5 cent kwh or $1762.50 the consumptive rate currently 24.8 and rising around 10% a year or $1860.00or the premium feed back of 66 cent or $4950 p.a . With the carbon tax power will increase in victoria by 3 cent kwh or an extra savings of $225 .
So for new system the minimal return on a 5KW array is 12.5% and could possibly go up to 35.3% return on your money
PV is certainly a good investment but does it make sense from a carbon perspective