I suppose it's been done before, but I saw my first solar-powered canoe. I was bicycling along a street that bordered the Kentucky River in Frankfurt. When I passed the boat, which was sitting on a trailer, my brain went "whaaa..," and I doubled back to look at it more closely. Two panels were bolted to the gunwales and wired to a small electric outboard in the stern. I'd loved to know how it performed.