Solar hot water systems work by pumping water through the solar panels during the day, where this water is then heated by the sun and stored back in the tank for later use. If not enough hot water is generated (for example during winter) the systems will usually have a gas or electric boost kick in which will heat the tank.
Being powered mostly by the sun, solar hot water systems are some of the cheapest systems to run, and can provide around 6 – 9 months of solar generated free hot water per year!
Due to their high level of energy efficiency, solar hot water systems are eligible for some of the most generous government rebates available to SA customers. While this does take a significant portion of the initial outlay off of the consumer, solar hot water systems do still tend to be one of the most expensive units in terms of out of pocket installation cost.
For a detailed explanation on how all types of solar hot water systems work see here: https://www.yourhome.gov.au/energy/hot-water-service
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