I have the pro3em with current firmware. I use the total active energy for measuring my heatpump as a "single device". Green is the heat pump. Related to it (often, but not always) is a grey bar that often has the same consumption as the green bar, but is also often on the negative side. I have no grid meters yet. I own three solar plants. Two of them already give energy input. The last one a hoymiles HMT2250 has not the appropriate datafield yet. My assumption was, that with this config the heat pump readings should be correct, but i am unsure because of those grey bars with the same amount of energy as sthe green ones. Anyone would mind to have a look and share experience ?