There is a good chance the most affordable panels may be customer returns for damage then resold at a reduced rate. They also have A b and C grades from the factory.
One panel was without damage the other had 2 pieces of wire sealed under the protective plastic but the panel is fine as the static pressure was low.
You can find semi flex pv with a 20 year manufacturers output warranty so with their life expectancy and my sporadic use I don't think I will be wearing them out.
They only make fiscal sense if you need weight savings durability or the ability to mount on curved surfaces.
This rack design will have about zero failure points
It will have coroplast inner boxed framework joined and filled with canned foam for strength , the rack will have to endure rough roads and be fully removable with panels on board.
The mppt chargers arrived , two of them one for Solar charging and one for a boost converter to increase battery voltage for more speed. Now Im waiting for pv cables to join it up.
