Reject threaded fasteners, return to nail and rivet.

Every installation has benefits and drawbacks:

• If you have humans walking below PV, you must prevent parts falling down
• The support must be quite wide, requiring more expensive carrying members
• Constrains traffic
• Cars are protected from hail and heat (good for car factories!)
• Makes electricity where it’s needed
• Very visible progress toward renewables

France made it mandatory for large malls to install these btw.

How do you know which option to pick though, if both seem equivalent in the moment?

When faced with seemingly equivalent choices, pick the once that maximizes your future options.