I’m surprised the landlord is ok with this. I understand the panels might be rated to withstand some amount of wind, but there’s a huge liability if this project lead to injury.
A good job was done considering the load on the indoor wiring, but the exposed wires on the outside of a building concern me. Typically wires have some level of insulation and/or conduit that reduces and contains the spread of fire. If wind did move the panels around, those wires could pull loose and start a fire.
SF does not perform frequent building inspection, but if an inspector saw this they would almost certainly cite that this violates building code. In the event of injury, insurance might not pay out given how this is setup.
Around the 2 minute mark in the video you can see he's ratchet strapped the panels together, and in turn that strap is attached to the roof (looks to be looped around a pipe?).
So he's not just relying on the wind rating of the panels.
A better and perhaps code compliant way to do this (this is sometimes done this way here in NL, no idea about the US) is to bolt the panels to e.g. an aluminum frame, which you'd then hold to the roof with ballast, e.g. cinder blocks or heavy yard tiles.
Depending on the panel area, frame and amount of ballast you can easily prove that there's no way the result would move due to weather, unless you were experiencing such apocalyptic winds that the house itself would be destroyed anyway.
A good job was done considering the load on the indoor wiring, but the exposed wires on the outside of a building concern me. Typically wires have some level of insulation and/or conduit that reduces and contains the spread of fire. If wind did move the panels around, those wires could pull loose and start a fire.
SF does not perform frequent building inspection, but if an inspector saw this they would almost certainly cite that this violates building code. In the event of injury, insurance might not pay out given how this is setup.