We start with the publication document. Therefore the completed format for Project Concept Paper (PPP) would not be part of the publication document or manuscript for Springer. Nevertheless we hope the publishing document could provide basic information and data for the preparation of climate-smart solar grid project document. The publishing document describes the basic principles, framework and methodology and technical aspects of building integrated solar grid systems with the power of digitalization and proposes an application of UNFCCC/UGIH LCA and consumption-based GHG accounting methodology and climate action as an innovation project in PNG. The proposed model needs to empirically be tested through actual implementation of a cooperative project/program with PNG, KOICA and other funding agencies (e.g. GCF, GGGI, etc.). As our cooperative efforts progress with data collection, we may have better ideas of how to connect both documents with one another. More in specific, this chapter discusses the next frontier in on–off smart solar energy grid models and their examples in Korea.