2026. Techno-Economic Optimization of Diesel–PV Hybrid Systems for Isolated Island Grids: Case Study of Tomia Island, Indonesia. ENERGY: JURNAL ILMIAH ILMU-ILMU TEKNIK. 16, 2 (Jul. 2026), 239–254. DOI:https://doi.org/10.51747/energy.v16i2.p239-254.