This is only to charge batteries on a 19-foot, open, day-sailing type sailboat. Mounting options for solar panels are limited and the possible ones detract from the boat's form and function. This just becomes a solar shore power in a sense. I do not want to wire the boat for typical shore power chargers. This is in freshwater - no problems in use other than the curious critters. Saltwater certainly could pose problems, but maybe not a deal breaker.
There are large arrays in use and many more under development - mostly in far east. Not much that I can find for small-scale. Here is MTU project:
