Spatial variation of solar energy is crucial for the estimation of the regional potential and selection of
construction location. This paper presents a case study of using high resolution grid map of solar
radiation combined with the other restriction factors to evaluate the comprehensive potential analysis of
solar PV generation at the regional scale, in order to present a framework of decision support tool for
solar energy management in a regional area. The cost of PV generation is calculated based on the
geographical distribution of technical potential. Moreover, geospatial supply curve (GSC) is employed to
portray the evolution of available potential of photovoltaics (PV) generation with the increase of the
generation cost. By integrating the economic evaluation variables of net present value and simple
payback period, grid-based economic feasibility of PV generation project is then carried out under two
feed-in-tariff scenarios. Finally, total CO2reduction potential and its spatial distribution in the study area
are calculated. The results confirm that PV technology provides high potential for roof-top application
and large-scale PV stations. Additionally, determining a reasonable feed-in tariff is essential for
expanding the application of solar PV energy. Thefindings improve understanding of regional renewable
energy strategies and the supply/demand assessmen