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Would it be possible for you to switch the Shelly Cloud to English for a short time and take the screenshots again? Thx.
Unfortunately, I don't speak French 
The term „total real time energy“ in conjunction with „kW“ implies it is POWER (which is always „real time“), not ENERGY (which is measured in kWh). IMHO it is a wrong translation in the App…
Unfortunately, Shelly takes the values for “Energy by Application Type” for “Generated Energy” and “Grid Source” both as positive numbers - even if the value for Grid Source is an export and therefore negative (in the individual values of the Pro 3EM, export is displayed as a green number):
In your case 293,6 W + 10,7 W = 294,3 W
This is taken as the Energy-over-all (but not in the graph on the left).
The energy of all Shellys with an assigned energy type is then subtracted from this and the remainder is shown as Unknown:
Pool and garden 75,3 W + Water heater 1,9 W + Heating and cooling 1,5 W = 78,7 W (energy of all known types)
Energy-over-all 294,3 W - 78,7 W = Unknown 215,6 W (225,6 W in your screenshot). Smaller deviations are normal because the measured values are not always read out at exactly the same time.
Total Energy (left) should be the consumption in my opinion. Unfortunately, I can not explain your Total Energy value either.
Here's an example from me:
I have excluded Heating and Cooling from the calculation. Otherwise Total would not represent my household consumption either.
Generated energy 1570,0 W + Grid source 1110,0 W (in reality export) = 2680,0 W Energy-over-all
Energy-over-all 2680,0 W - Heating and cooling 42,2 W = 2637,8 W is Unknown (2640,0 W in the screenshot)
Total Real Time Energy: Generated energy 1570,0 W - Grid source 1110,0 W = 460 W (same value in screenshot on the left)
I hope this helps you a bit. I do not think the whole thing is that easy. There are also errors in Shelly's calculation due to the different consideration of the signs.
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Edit: What thgoebel writes also applies: Instead of Energy, it should read Power everywhere, because the figures are in watts / kilo watts.
