What is a solar hot water system?

A solar hot water system heats water by circulating it through roof-mounted collectors that capture solar energy, then stores the warmed water in a tank for household use. The collectors absorb heat from the sun, even on overcast days, and transfer it to water flowing through internal pipes. This heated water drains to an insulated storage tank, typically 250 to 400 liters, where it remains available on demand.

Because Perth experiences variable weather and demand fluctuates seasonally, most systems include a boost element: either a gas burner or electric heating coil inside the tank. This kicks in automatically when water temperature drops below a set point or when hot water demand exceeds what the solar collectors have already heated. The boost ensures consistent supply during winter months or extended cloudy periods.

The system saves households money on energy costs by reducing reliance on conventional heating, though the long-term benefit depends on sun exposure, roof orientation, and household usage patterns. A qualified plumber can assess your property's suitability, recommend collector size and tank capacity, and install the system to work safely with your existing plumbing.

If you need a system installed or serviced, find experienced providers through hot water specialists in the Perth directory.