Solar energy (PV) is fast becoming one of the cheapest and most widely used forms of energy generation. ECN part of TNO contributes to this by developing new solar cell technology that combines high yield at low cost. In addition, ECN part of TNO is working on making solar panels even more widely applicable, for example by integrating solar power technology into building components and infrastructure and by developing energy storage technology. We do this together with the Dutch business community. The technology to produce solar cells and solar panels is an important export product of the Netherlands.