But let's be fair here, as you do a lot of assumptions:

The zip ties are metal zip ties. Those won't fall off because of UV. Panel is hanging inside the balcony. If it falls, it will fall into the balcony - it's bigger then the rails and ground is solid. It's not running behind the glass, the glass looks taken off. I can't be 100% sure, but it seems so. You can't see how the power cable is pushed into the home, so that's pure speculation.

The picture looks like taken mid-installation, some metal ties aren't even fastened.