Design and Economic Analysis of Grid- Connected Photovoltaic on Electrical Engineering Building in Universitas Andalas

Abstract

This paper proposes a design and economic analysis of grid-connected photovoltaic power system on the roof of Electrical Engineering building in Universitas Andalas. The system is designed based on a real measurement data of small scale 1.25 kWp PV system on the rooftop Electrical Engineering Department and upscale to reach system designed. The PV system design result shows that the peak load of Electrical Engineering Department can be shaved from 29.5 kW to be 15.9 kW by install 104 solar panels or 26 kWp PV system. The initial investment required to build the PV system is IDR 445 million. The economic feasibility study has considered weather conditions from BMKG data per year and discount rate 4.25%. The result of economic analysis suggests that the development of PV system on the Electrical Engineering building based on MV tariff is feasible for all feasibility criteria. However, for social tariff was used the cost of PV energy per kWh higher than PLN tariff IDR 735 per kWh. This value indicate that the project is not profitable. Therefore, the installation of on grid PV system for university building need to considered the recent electrical tariff regulation.