Assuming they can’t/won’t/shouldn’t back feed, that’s a lot easier to do in most of 240V single phase land. In US/Canada, you gotta pick the side of your building’s circuit that your continuous loads are usually on.

We're only talking ~800W 120V in most cases, so phase balancing is immaterial in this use case (in the context of balcony solar).

Edit: For larger installs (many vertical panels, >1kw), agree that balancing and a dedicated circuit is likely more optimal.

I mean, if you can't backfeed, you might have stuff "on" in your home, but your solar might not be on that side so it's not doing you any good.

I don't understand what's different...