What should water temperature be during no sunlight periods, using a solar/electric water heater?
We have solar water heating, but during off-peak hours, the electric water heater kicks in. ( Two hours in the evening and 1.5 hours in the early morning) The water is 140 degrees. Is this normal? I know the thermostat can be turned down on regular water heaters, but does it need to be this [...]
keep looking »