Thanks. Glad you found it useful. The % target is still used by the tank itself, but once the sun is shining, the Eddi will keep heating until the element’s thermostat cuts off. For example, I set the target temp to 50 and have it sweet to charge to 60% each morning. When it’s really sunny, the Eddi heats the tank to 100%. The next morning, the Mixergy does nothing as there might still be 95% of the water at the target temp. It’s not perfect though. The first few sunny days saw the water heat to 75!! I had to adjust the safety cut off. I’m looking at having a mixing valve added to the tank so if the water is heated to 75 it’s not a problem for my small children.

Mixergy make their own Solar Diverter, which I suppose works better with their tank, bit as I have a Zappi, I though the Eddi would be a better fit.