It is the first mission to Jupiter using solar panels instead of radioisotope thermoelectric generators. (aerospaceguide.net)
NASA's Jet Propulsion Laboratory is working with the Department of Energy on ways to make the next generation of radioisotope power systems even more powerful and capable. (mars.jpl.nasa.gov)
Dragonfly would be powered by a Multi-Mission Radioisotope Thermoelectric Generator (MMRTG); while there is enough sunlight at Titan's surface to see, there is not enough to use solar power efficiently. (sciencedaily.com)