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Just a heads up to another country... in Australia, I pay 31c / KWh and $1.50 per day supply charge. This means solar is pretty worthwhile. I have 6.6kw of panels with a 5kw inverter. There are rules about how much we can feed back to the grid as about half the houses near me have them so a 5kw inverter is the maximum allowed. On a sunny day it will make a bit over 40KW/h and I get 22c for each KW fed back to the grid.
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