I posted this in a different thread but I think it bears repeating here: I have the Tesla app and I have the Solar Edge app and web site access. (I cannot make changes, but I can view the panel layout and all the rest.) The Tesla app shows Powerwall SoC, which Solar Edge does not (I think Solar Edge doesn't see the PW except as part of the house.) The Tesla app also shows the power flow at the moment and seems consistent with what I'd expect, given what's drawing power at the moment.
But the daily totals shown on the Tesla app are way out of line with the totals shown on the Solar Edge app and web site. As an example, for yesterday Tesla shows home usage as 23.2 kWh and solar energy as 19 kWh. It shows 10.1 kWh from PW and 11.6 kWh to PW. And 0.2 kWh from grid and 0.3 kWh to grid. But Solar Edge shows System Production as 39.56 kWh with 0.51 kWh exported to the grid, and it shows Consumption as 39.26 kWh with 0.21 kWh imported from the grid.
The Solar Edge numbers are somewhat higher than my average daily usage from my June utility bill, before the solar was installed, this being a warmer month with more A/C usage.
The pattern is consistent, with Tesla showing numbers well below Solar Edge's numbers, and Tesla's numbers not adding up. I believe that Tesla's totals are extremely inaccurate, though I'm relying on Tesla to show me the state of charge of the Powerwalls.
The cottage uses about half as much energy as the house, but the general pattern is the same, with the Tesla app giving numbers that are too low and don't add up and are out of line with what I'd expect based on last month's utility bill. And the cottage is actually using more energy now that the renter can leave the A/C on during the day for free, which makes Tesla's numbers even more out of line with what I'd expect .