The thread was designed obviously for people with hotwater services run on electric and obviously not gas, hence the wording "electric".
Obviously the 14 percent of people in Aust who have solar on the roof receive a much discounted hot water rate so this thread won't help those.
Thread designed for people without gas and without solar.

I live in a gated community and everyone has the same hotwater service and the 60 homes were all built by same builder. At a owners meeting I passed on my idea and over half of the estate have saved a lot of money on their electricity.
Maybe someone out in pinball land will benefit. You can only try.