Musk is notorious for shuffling assets across his companies to make some financials look better. For example, shuffling Twitter servers (and then all of Twitter) under xAI.
https://futurism.com/advanced-transport/spacex-buying-unfath...
(to be crystal clear, I am making a joke equating the failed SolarCity/Tesla solar shingles to the (generally considered very painful) Herpes Zoster manifestation also called "shingles")