The study aims to analyze the technical feasibility, financial feasibility, and analyze the aspects of energy efficiency and sustainability in the 10 MWp PLTS IPP project in Sambas Regency, West Kalimantan. The approach used involves technical analysis with a location feasibility approach consisting of geographical, accessibility, and spatial aspects, as well as a technical approach to energy production feasibility based on the IEC 61724 reference. Another approach used is the time value of money which analyzes the financial feasibility of the NPV, IRR, MIRR, PBP, DPP, BCR/PI aspects and is followed by financial analysis of LCC, LGC, LCOE and analyzes risks based on project sensitivity. The efficiency and sustainability aspect approach uses the EROI and NEA approaches. The results of the study indicate that the project is technically feasible with a location aspect that is not prone to disasters followed by adequate accessibility, but has the constraint of the need for IPPKH management. Technical feasibility in terms of energy production produces a specific production of 1337.8 kWh/kWp/year with a performance ratio of 79% according to the IEC 61724 standard. Two scenarios applied with company capital funding and loan funding show that loan funding shows better cost efficiency and return on investment ratio with NPV of 1.431.115.665, IRR of 10.24%, MIRR of 10.05%, PBP 7 years, DPP 23 years, BCR/PI 1.01. The EROI value produced is 9.50 and NEA 1.220.498.551,75 MJ. The research conducted provides an important contribution to considering the feasibility of investment in Indonesia, especially West Kalimantan Province with a focus on the New and Renewable Energy sector of Solar sources on an IPP scale.