NOTES: Most days intermittent sunny and cool.
As the array is emptied this averages out the temperatures achieved with the exception of day 3 when the pump was deliberately switched off.
As the incoming mains cold water temperature was 19C there is a heating effect on each day.
This implies that on non sunny days there will still be a heating effect and on sunny days a much larger difference, the result being either a volume of heated water or constant consumption of warm water.
TWO DAY RECORDING OF ARRAY TEMPERATURE