rpzingg Havethe same issue, although user manual says for DT metering: "3. View the electricity input form photovoltaic power generation to the State Grid * The APP can view the electricity generation input to the State Grid at the time, day, month, and year"

rpzingg Ihave the same issue with mine an the Smart Life app. It seems data is recorded (total sum forward and reverse is displayed), but histoy is stored elsewhere than Smart Life expects. Therefore even year history shows all 0. Am in contact with supplier.

rpzingg@BG161417166 Connected it anywhere between DC/AC converter and outlet. Smart Life (tuya) app shows both forward (user, if any) and reverse (i.e. solar) energy total. Clicking on the sums should show history, but in my case only forward data shows, reverse history appears empty despite the sum page >0. Possibly a bug, I am checking with supplier.