Kevin Sara, founder of multi-region solar development company Nur Energie, and Nashwa Satti, project manager at Nur, talk about their work with CSP, or concentrated solar power, as opposed to the more common PV, or photovoltaic solar power. They explain: how CSP works and its advantages over PV; their €10bn solar project to export power from Tunisia to Italy via a 600km undersea cable; the potential for expansion in sub-Saharan Africa and into rural 'off-grid' areas; the financing of the business; and the benefits of power plants than can be assembled locally