Sure! Good thing I implemented the DHW temperature display that’s now also on emoncms.org 
, as this will be extra helpful. Have your pick looking at the data with either the central NTC10K sensor installed in the tank that’s used by the Vaillant controller or my self-installed sensor at the top of the tank.
Charging offset was set to 20K up until yesterday, I just set it to 3K, so this afternoon’s run will feature the new offset. I also switched the hysteresis to 15K and disabled my automation, so the automatic start will happen anytime soon. Let me know whether I should do any more experiments in the name of science 
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My Heatpump App with central DHW sensor (tank default, used by Vaillant controller)
My Heatpump App with top DHW sensor (self-installed DS18B20)
Weather-based DHW control is such a low hanging fruit for efficiency boosting, why wouldn’t I do it?! 