I bought four neodymium magnets that come with a 6mm bolt & rubber coating and used them to hold down the four corners of a flexible solar panel. No adhesive, No holes in the roof. I'm spacing the panel off the roof with a bit of foam weatherstripping, partially for airflow, and partially to keep the panel from damaging the paint.
The magnets have about 26lbs force each. I could add a couple more or buy stronger ones if necessary.
Has anyone tried this before? Any reason why this won't work?
Should I run 'er up to a 'hunnerd and see if anything fly's off?