That raises an interesting question. What would the shelf life be of a pair of replacement panels that remained packed away? How long could they sit in storage and still function perfectly? There has to be some deterioration eventually, even if they are not being used, right?
Obviously, I was considerig the possibility of buying a spare set of panels to keep in storage until that day, still long in the future, when the existing panels on my Summits need replacing. It doesn't make sense to do this if the prices (not to mention the company) are stable, but it could be a good move if the panels get to be a lot more expensive or become entirely unavailable. An interesting idea, anyway.