Nope, no marine applications I see... Active guiding needed to keep the
sun focused... An acrylic lens that will scratch easily, and yellow,
and craze, 100% sure to have moisture problems in the dome, etc... At
first look I don't have that warm fuzzy feeling that this is something
for my boat... Interesting but not ready for the big time... Flat solar
panels all over the saloon roof is where I'm going...

cheers ... denny

A flat solar panel of the same size as the Fresnel lens would give the
same power and without any issues of over heating of the small panel
under the Fresnel lens. The Fresnel lens has its own issues of
transparency and tracking the sun. This could be practical if the cost
of the solar panels was so high that it was prohibitive to make them
the same size as the Fresnel lens.