The EU goals for the clean energy transition require at least a 55% reduction in greenhouse gas emissions (from 1990 levels) by 2030, according to the ‘Fit for 55’ package. To achieve these goals, electricity grids will be required to operate in an overall context of 50% electricity production from RES of any scale by 2030. The huge rise in the share of solar PV and wind in total generation fundamentally reshapes the European power system and significantly increases the need to build new HVAC or HVDC cable connections. These will have a crucial role to link islands or offshore wind parks to mainland or to connect countries over long distances. The CABLEGNOSIS project aims to deliver innovative cable technologies that will support the clean energy transition era for the 2050 targets set at European level. CABLEGNOSIS project will develop innovative insulation and conductor design technologies, high performance and environmentally friendly cable insulation materials, ageing studies of superconducting cables, recyclability technologies for the materials used in power cables, as well as pre-fault condition, aging and remote monitoring AI-based tools. A feasibility assessment framework and detailed analysis for the use of superconducting cables for submarine connections. A respective feasibility analysis will be developed for the offshore wind parks in The Netherlands and Germany. The CABLEGNOSIS technologies will be validated in five European countries (Italy, UK, Greece, Hungary, Cyprus). CABLEGNOSIS will deliver a complete deployment plan for supporting the development and operation of efficient, reliable and environmentally friendly cable systems to support the energy transition. The deployment plan will provide the scalability and replicability framework of using the CABLEGNOSIS technologies in future cable development projects, with emphasis in the UK-Morocco interconnection, Cyprus-Israel interconnection, offshore developments in the Aegean Sea.