Earth-abundant and cheap 3.generation solar cell materials (e.g. kesterite structured copper-zinc-tin-sulfide and organic photovoltaics), require substantially lower energy input in the manufacturing process, compared to the conventional silicon solar cells. Thus upscaling the production of these materials for solar cell production in order to replace current polluting energy technologies is crucial for negating anthropogenic CO2-emission and resulting global climate change. Unfortunately, there is still room for improvement, when comparing the current efficiency to theory. In order to pave the way for the upscaling of these 3.generation solar cells it is important to study the materials, identify the obstacles and develop methods for large scale production. In SEEWHI we will make full 3D quantifiable images of whole solar cell devices and ultrafast imaging of charge currents that may be correlated directly with 3D models of charge generation and transport. We will use this combination of experiment and theory to predict and verify the optimal structure and use with in-line X-ray scattering techniques to monitor and control the structure during high-speed R2R coating.