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Hi Marc,
In Qld it is no longer legal to buy and install an electric hot water system.
I don't know about your state.
I have a sneaky suspicion that the off peak system of cheap power will become a thing of the past. It is a logical conclusion. Also solar power companies have it in their propaganda.
If you go for a solar photovoltaic (PV) system, make sure that you do your research. Cheap systems use plate glass that is not as strong as tempered glass. They also can become clouded, decreasing incident light onto the silicon.
Use the SMA inverter, German. (Sunny Boy) The Chinese PV panels are made to German specs or are assembled in China. They are of good quality. Modern Solar Group is a reputable dealer and installer.
Hope this helps.
Cheers
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