Comparability of Household Solar Power Plant Between On-Grid System and Hybrid System in Semarang City Based on Technical and Economic Feasibility

The electricity produced by on-grid system solar power plant can be sold to PLN with a low price of 65% from Rp. 1,444.70 per kWh or Rp. 939,055 per kWh according to electricity rate policy. When electricity production can be stored in batteries, it aims only for self-consumption, therefore, it is assumed that the price of electricity production remains of Rp. 1,444.70. Moreover, in this study, the writers will compare the target savings between electricity productions sold to PLN or stored in battery storage for self-consumption and compare the most profitable system between both systems. This study aims to compare the household-scale on-grid PV and hybrid PV potentials in engineering and economics terms. The research method uses a simulation on PVSyst software for technical feasibility and RETscreen software for economic feasibility calculation. The research results are obtained based on the comparison of both systems which are the hybrid system used with a 1,200 Wp panel, a 24V 200 Ah battery and a 2,400 W inverter, while on-grid system uses a 1,200 Wp panel and 1,500 W inverter. The on-grid design will produce electrical energy of 4,57 kWh/kWp/day with an initial investment value of IDR 28,309,000, on the other hand, the Hybrid design will produce 4,04 kWh/Kwp/day with an initial investment value of IDR 33,028,100 for a 24 years project period and with approximately six times battery replacements. The NPV value in the Hybrid system calculated is IDR “6,985,136 and in the on-grid system is IDR 16.344.380. Therefore, the hybrid system is considered not economically feasible and does not gain more profit than on-grid system.