The nighttime problem is not shade but 2 weeks of cooling. The boards may contract at a different rate than the components and solder joints may crack or separate. Other factors from differential expansion can also cause problems. My guess is that although it was not intended to be designed to survive cold temperatures, the engineers tried to put survival into the design anyway.

By standing on its head, nozzles up–provides shade?

The nozzles flex so breadboards won’t?