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O.T Carbon Tax v's PV ecomonic? but for who 17-Aug-2011 At 2:58:48 PM lacto

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My understanding is brown coal produces 1.3 tonne per Mwh , black coal 1 tonne and gas turbine .3 to.4 tonne which is more than $18 .
I have replaced or supplemented my storage electic hotwater heating with solar. A much better deal interms of carbon reduction but as power is offpeak the economics are not quite as good .
On the house we replaced a 600l electric storage which averaged about 10kwh a day or say 3500 kwh @ 10 cents including gst for a saving of $350. and carbon saving of $45 per year against an installed cost of $3500 plus the use of bottled gas to supplement on cold days .
In the dairy where huge amount of hot 90 to 95 degree water was needed 1200 to 1600l per day ,a solar 90 evacuated tube pre heater was put in which on average provided 25 degree of preheat a day saving 35 kwh a day or around 12000Kwh per year @ 9 cents (no gst)or $1080 and carbon of $350 a year . All up cost of $8000 plus my labour to install and no recs cashed .
Targetting electric hws is a far more effective carbon reducer