A geospatial assessment of Indonesia’s nationwide solar PV technical potential has been conducted using publicly sourced national and international data. The analysis finds that Indonesia’s solar PV technical potential capacity ranges between 3,396 GWp up to 19,835 GWp (depending on land-use exclusions scenarios). In terms of generation potential, Indonesia can achieve 4,705 – 26,791 TWh/year, by taking up 4.34% to 24.43% of the total landmass (depending on the scenario). The results also show that Indonesia’s utility-scale solar PV potential is well above (16 to 95 times larger) the current national official estimate, that is 207 GW. The findings presented in this work could be used to support solar power development in the country, while at the same time, meet future electricity demand and achieve renewable energy targets.