Looking for a simpler solution [Martin] came up with his own solar pool heater for under $100! He’s copied the basic design of a solar pool heater but managed to do it using fairly cheap parts ...

Essentially, it allows the water heater to get much hotter during times when solar energy is available, and lets it drop to lower values before running the heater on utility electricity during ...

Code requirements: Easily modified timing Interruptible via buttons+display at controller and/or via phone app (SmartThings) Automatic schedule recovery after a power outage Automatic speed for Solar ...