Robertski wrote:
Please confirm that your water heater is electric powered by solar PV panels. You may live in Australia, whereas I live in the US. In many parts of the world, solar water heaters are where the water is heated by the sun. It is a great way to go, especially since many countries give incentives to install the Solar Water Heater. The US govt has no such incentives, therefor they aren't sold here much. This is a pity, as they are very effective.
I live in Oregon and I have solar hot water for over 15 years. If I had to do it again, I would in a heartbeat.