it will be form fitted to a kayak boat, obviously must be waterproof and provide me with as close to 400 watts or more that I can get. It will be a solar powered kayak. The important factors are waterproof first, then weight, then power output per area, then form fitting. I could mount the panels even if they are not flexible to the hull of the boat, but of course I would like it to look nice and flex around the boat.