This partly depends on the size of the hot water cylinder/solar combination that you choose.

In any event, the Apricus solar system is designed to automatically shut down once the hot water cylinder gets up to 80 degrees. This is a safety feature to prevent scalding water coming out of your hot water taps. As soon as you draw hot water, the system will automatically restart.

(There is also a legal requirement that all hot water systems must be fitted with a temperature-limiting valve for safety purposes).

If your system is electrically or gas boosted then any shortfall in temperature will be ‘topped up’ by the booster, if you don’t like the thought of fluctuating hot water temperature.