Sorry I can't answer this re sunlight. I stow ours in the cockpit locker, taking out only for use. Not a burden - compared to "normal" hose it is light weight, small in size, easy to carry with one hand, no kinks, easy to stow. And I'm talking 50 feet of hose when expanded under pressure. A lot easier than coiling a 50 foot hose on the provided hose hanger on the dock.
Only negative I have heard is that some brands sold on line are cheaply made and do not last.
Only negative I have heard is that some brands sold on line are cheaply made and do not last.