I don't think that's the true at all. There's a vast and visible footprint we can see with batteries (pretty sure every major solar company in the U.S. that has a battery storage option does at least some Tesla) that has no equivalent with solar rooftops. The former are ubiquitous while the latter are so far as I can tell almost entirely non existent.

And if that's too light on data I'll put it this way, I'm reasonably confident I can find 10 solar companies that install Tesla batteries for every one that does Solar City roofs.

You can absolutely draw adverse inferences from Tesla's refusal to report certain straightforward, useful numbers. For example, their refusal to publish any real safety statistics, to the point where Elon Musk himself has to invoke rubbish numbers like the 'community tracker'.

If, after all the lawsuits and accusations of failure, and the reporting about the near-zero deliveries and idled factories, the Tesla Energy division is giving you no numbers on the solar roof, and is lumping them together with a totally different product like batteries, there is one thing and only one thing that that means: the numbers are awful.

But even if it's true I assume they are including their utility-scale solar and battery packs, which has nothing to do with Solar City: the panels are generic, the customer lists are not residential, they don't use the fancy shingles. Solar City did not help them in any way with these getting or fulfilling these contracts.