The NextBase project, deals with the development of innovative high performance c-Si solar cells and modules based on the interdigitated back-contacted silicon heterojunction (IBC-SHJ) solar cell concept targeting cells with efficiency above 26.0 % and corresponding solar modules with efficiency above 22.0 %. At the same time, the NextBase project pursues the development of a new industrial manufacturing tool and low-cost processes enabling a competitive IBC-SHJ solar module cost of < 0.35 €/Wp.