Techno-economic Analysis of Solar-powered Lighting of Bali above Seawater Toll-road

The objective of this study was to obtain a technical and economic analysis of solar-powered lighting (SPL) implementation at Bali above Seawater Toll-Road. The SPL was designed to operate 12Hours/day with average illumination ?15-lux. Those requirements can be met by an SPL unit that consists of 2-pieces 87-W LED lights mounted on 10-m double arms pole with 2.37-m arm length and 15º tilt angle. Each LED light was powered by a 260-Wp solar panel, 24V-180AH battery and 10-A solar charge controller. Every SPL unit should be installed on the toll-road median with 22.5-m pole-spacing and required 361-units to illuminate throughout 8,122.5-m toll-road length. Benefits of SPL implementation were electricity saving 256.15MWh/yr and carbon emission reduction 217.98TonesCO2/yr. However, the SPL electrical-based cost was 3.9 times more expensive than conventional street lighting. And based on the investment feasibility analysis using NPI and PI techniques showed that the SPL implementation was not feasible.