On the occasion of the Second Technical Seminar of the SOLE project aimed at sharing knowledge on energy rehabilitation, held online on the 30th of March 2021, Jordi Solé Muntada, Director of ECROWD, a crowdlending platform based in Barcelona (Spain) that organizations (companies, municipalities, communities, etc.) can use to raise funds to finance investments with their own collective loan campaigns, has been invited as an external expert to discuss the available tools and options concerning collaborative and blended financing solutions to finance energy efficiency interventions on existing buildings. In this short video Director Muntada explains how does collaborative financing for innovative investment projects in the energy sector work.