I have integrated a Goodwe inverter (GW3048 EM) via the HACS component. (However, I have also tested the original component).
As also described here, I have created the sensors energy bought and energy sold (Riemann sum).
Unlike in the doc, however, I did not use the sensor sensor.goodwe_active_power but sensor.on_grid_export_power, since active_power does not exist.
Unfortunately, this is so inaccurate that the monthly values in the energy dashboard differ by more than 50%.
In the SEMS portal of Goodwe, however, the values are quite accurate.
Especially in the lower power range (house consumption < 100 W, at night), the deviations seem to be so large. Although power is drawn at night, grid_export_power shows 16 watts. During the day, it tends to match compared to the smart meter.
I suspect that therefore also the consumption values are not correct.
Does anyone have an idea what this could be and what I can do about it?
Thanks for a tip