This is the wrong comparison that should be check. You should be looking at the Tesla app Grid kW value versus what is displayed on the smart meter at the same instant. Are this two the same or with a 0.1kW of each other? If not then something is amiss.
You have to go brute force on this. Turn all of the breakers off and your Powerwalls and your PV generation. Does the app report 0 kW? Does the smart meter report 0 kW? With the PW and PV off, turn on the breakers one-by-one and repeat the comparison. Try your refrigerator first, maybe a compressor motor has gone bad and is drawing a lot of current. If you see a discrepancy between the app and smart meter that might be the problem. If you a load for a breaker that is more than you expect that might be the problem.
The only other thing that the forum might be able to look into is for you to provide
ALL of the following for the 10/9/2022
- Screen capture for the Powerwall for the day with the color mode
- Screen capture for the Grid for the day with the color mode
- Screen capture for the House for the day with the color mode
- Download the data for the day and post the CSV file (either as a table or else I think you need to ZIP it to post)
With that additional data and the previously posted screen capture for Solar for the day with the color mode and your DE 30 minute data, maybe a discrepancy will be found.