They are installed about 10 inches above my sheet metal roof. The solar panels are Monocrystallin.
Is it normal to see moisture inside the solar panels
installationsolar-panels
Related Solutions
Installing solar should be one of the last things you do. You should first concentrate on those things that will reduce the amount of energy you will be using. "The Green Building Advisor" has a good article on The Energy Efficiency Pyramid.
I believe this article will help you make some wise decisions about where to start.
Stacking the panels on top of each other should be fine, but I would not suggest stacking all off them on top of each other as the bottom one will have to bear tremendous weight and might warp it.
Try and place wooden battens (for air flow to stop moisture from being trapped and help displace weight evenly to the next panel using a soft surface) between panels on the same frame that they were mounted to the roof. The frame is load bearing and will handle weight on top of it and disperse weight downwards to the next panel.
You do not have to cover each one in bubble wrap. Just stack em using batons(bareing in mind weight) and then cover the entire stack in foil and possibly some polystyrene and or bubble wrap on the corners and top to prevent shock damage in case something hits or falls on it.. you never know.
Some panels you can stack ontop of each other with no problem as they have a robust frame that supports all the weight.
Exercise some common sense in how to stack them. Make sure they are level and aligned. check on them every now and again during storage phase in case the weight makes something give in.
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Best Answer
It isn't normal in the sense that it's normal operating procedure. It can be normal in the sense that it does happen as it is hard to keep moisture out over the long term.
That is the answer to your specific question and I wonder if you more want to know if you should or need to do something about it or can stop worrying about it.
You do need to do something about it. My understanding is that moisture degrades performance, can cause electrical issues or corrosion, and can shorten the overall lifespan of the panel. Moving forward, I suggest contacting either your installer or the manufacturer to discuss the situation and what to do about it, and who pays for it. Also I suggest reviewing your installation contract about warranty and service.