I would hope electricians would always double check the line they're working on regardless.

What's interesting about this is that you don't have to necessarily pull permits for electrical work, as nobody is running conduit or attaching to electrical panel.
Im grandfathered into an old solar rate plan, and if I change the system or add more panels I'll lose that privilege. However, if I don't have to tell the city or utility anything, that opens the door for expanding with balcony solar panels.