I have a US Tesla install with a Solivia TL inverter (7600kw system). I have two CTs on the inputs coming from the inverter to my main panel which is located at the bottom of the panel in ports 13 & 14 of the IoTaWatt.
Right now, there is power (no much due to bad weather), and both report a positive values which I would expect for energy production.
Today, I take my mains (positive consumption) and subtract the value of solar energy production which deducts the production from consumption for my total usage and exporting. The solar when producing energy is positive based on how the CTs are configured right now. However, I would assume (and I’m sure wrongly) that if energy was flowing in reverse (mains to inverter) to supply power to the inverter during the night that it should be a negative value instead of a positive one During non-production periods, to keep the inverter operational the manual claims the device requires a draw of 5w-7w until it starts to receive power the next sunny day.
Both “Solar_1” and “Solar_2” ports on the IoTaWatt have the checkbox to allow for reverse values as seen below. If at night I try to reverse the value to be negative by checking the “Reverse” box, it sets both night and day to throwing off my production/consumption values. It is not a bug deal, but over long periods of time, the 5-7w of mains draw now showing up as production (positive) adds up.
Just wondering what I’m doing wrong to not see the negative values at night or if the 5-7watts is too low to make a difference? Should I have to reverse one of the two CTs to correctly detect the direction of the flow like a 240v circuit? Happy to try anything people can recommend.