Quote:
Originally Posted by rnln
Anyone has/experience water from solar tank as preheat, and electric tank as secondary before going into the house? I wonder if the electric tank has sensor so that it's won't turn on when water is already hot from solar tank.
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it's a very simple setup
the electric heater is controlled by a normal thermostat which reads temperature so for example:
let's say eh (electric heater) therm set at 120d, water coming in from solar is at 90d this would mean that eh would only have to raise temp 30d to satisfy the therm
obviously water temp is going to vary at different times a day depending on solar temp so your system will be most efficient during sun light times