Solarpunk

Catemaran hulls are specifically designed as such, you can't use normal hulls.

You do gain the extra room for solar, but equally you also make the boat wider, making it less flacrical in confined waterways like canals and rivers.

In high latitudes having a vertical solar sail might actually work quite well to well as both a solar array and a wind sail. But that will require significant engineering design time to get right.