A Solar Sailer was a unique type of starship powered by a solar sail, this sail gathered energy from nearby stars and converted it into a usable energy for starship propulsion. The solar sail itself was constructed out a material that helped it absorb the residual solar wind and photonic energy released by stars. Energy gathered by the sail provided by the starship with acceleration and the power to activate its hyperdrive motivator which would trigger the light speed capabilities and send it into hyperspace.
Count Dooku owned a Solar Sailer during the Clone Wars which he used as a personal transport. Using a Punworcca 116-class Instellar Swoop manufactured on Geonosis, Dooku had a sail fitted to this vessel converting it into a solar sailer. Dooku used this vessel to escape Geonosis in the aftermath of the first battle of the Clone Wars.