Question about energy usage

[Toulon7559]

@rednas

Without an output meter at the solar system you don't know the power distribution in your internal network.
What you would like to get (= an accurate measurement of consumption in combination with solar generation), requires that you perform a well synchronized read-out of the Smart-meter and the output-meter of the solar system, and these meters both must be sufficiently accurate.
IMHO, that is not possible with simple instruments and simple software.
If you have a Smart meter and a simple output-meter at your Solar system, the best you get is a survey at hourly or daily basis.