This past weekend I scored another free bit to the solar panel setup. I was helping my father in law move a concrete sink (WOW heavy!) and he had this sitting next to it. A contractor ripped it out of the basement and it still seems to work just fine. We pressurized the bladder and it seems to hold air... I'm sure the size is a bit overkill for the panel setup, but hey its free and it'll still work great.