Hello, I built a 4'x11'6" Solar water Glycol system. Built and installed 2008 August.
We live in Northern Montana,USA during this summer it made on average 50 gallons of
124 degree F from 70F.. 80 F inlet temp.on Pre-tank and it brought Main tank up to same temp from set point of 110 degree's. Will be better next year as will be trimming a tree.
Beings as it was built DIY I added a Air system to under side which is also 12 volt powered air movement.
Only for fall and winter time,early spring. Plan on adding a Evacuated tube system for second stage on
Was a fun project and now working on wind turbine to keep batteries charged & will direct excess to 12volt
immersion heater installed in pre tank with Morning star 45.