The mission concept “16U4SBSP”, funded by the European Space Agency through the Sysnova campaign “Innovative Missions Concepts enabled by Swarms of Cube- Sats”, aims to demonstrate the feasibility of a swarm of 16U CubeSats for a scaled demonstration of Space-Based Solar Power (SBSP). This demonstration mission can provide wireless electric energy in kW-scale to space-to-ground or space-to-space applications. The main objective of the mission is to validate the SBSP concept and some of the involved technologies, in view of full-scale missions which could serve users in remote areas with low power requirements (<MW) or/and emergency operations in the blackout zones affected by natural or manmade hazards.