John Weiland wrote:Great that your diagram has a by-pass valve for winter as the collector will definitely need to be drained and by-passed during those months.
Chris Wells wrote:The image on the front is a simple thermosyphon system. I've seen some built using solar collectors to heat the water, while others have used wood furnaces. I have not seen but think it possible to build a version that contains both heat sources.
frank li wrote:It is a differential thermostat that will accept pv direct or battery power, is built solid, servicable and inexpensive. Does not have a touch screen with an ip address, but thats the point.