When the IEA PVPS Task8 study into VLS-PV was initiated in 1999, the idea of VLS-PV was considered a long-term, futuristic concept [3-5]. However, industrialized countries have made significant efforts to promote development of MW-scale PV installations, and related infrastructures at local, regional and international level. During the last few years, hundreds of MW-scale PV systems have been successfully constructed in many countries of the world [7-9]. It has been demonstrated that large MW-scale PV can be a feasible option of the current and future energy mix and especially VLS-PV potentially could provide a substantial portion of global energy needs. However, although the development of large scale PV worldwide has experienced unprecedented growth during the last years and the cost of PV is declining significantly, PV currently provides a tiny fraction of global energy sources. The future expansion of VLS-PV depends on successful international cooperation to advance knowledge on development of VLS-PV systems. In addition, a clear political commitment of governments and a stable regulatory framework towards creating a long-term stable
Electricity remains the key driver of social economic development at national and international level. The energy demand is growing fast. Experts predict that by 2035, the energy demand will increase by 65% compared with 2008 . To meet such fast growing energy demand without damaging our environment is not possible without significant increases in the share of renewable energy. It is very fortunate that many of developing countries in Asia and Africa have abundant resources of solar energy, lowcost desert and arid land areas which lead to the favourable economic conditions of large scale PV deployment. Wider utilization of solar energy should not only provide the foundation for reliable energy supply, but it may also bring a renaissance in the development of developing countries and can significantly contribute to enhancing their social economic development.