Dr. Abdul Muhaimin Mahmud
Comparative analysis of off-grid solar photovoltaic (PV) system: Technical and investment analysis
This paper demonstrates the type of solar Photovoltaic (PV) system and technology for off-grid Rural Electrification Program (REP) in Malaysia. Centralized off-grid solar PV system, normally referred to as Solar PV Hybrid System (SPVHS) is widely implemented by several REP initiatives. Even though SPVHS is considered successfully implemented for REP in rural Malaysia, several issues arise such as reliability of power supply, environmental issue, land requirement and lifetime cost. Thus, this study introduces Integrated Solar PV system (ISPV) to compliment the gap created by SPVHS. Comparative analysis on technical and economy was conducted on both systems. Technically, ISPV shows advantages as compared to the SPVHS. ISPV system is more reliable in providing daily energy required, environmentally friendly that the CO 2 emission reduces by 68% and efficient energy storage system. The ISPV allows flexibility that the energy generated by each system at the villages’ building and house can compensate each building/house energy needs while the
centralized system provides energy during peak demand and night time. Thus, power outage which can happen at SPVHS due to system failure can be avoided. Replacing Lithium base battery improves the operation and lifetime cost of the ISPV system. Furthermore, ISPV creates community involvement that part of the system operation is operated by the community. This model can guarantee sustainability of the REP. The project owner, in this case the Government can save 47% of project lifetime cost compared to the cost to implement SPVHS. Therefore, based on the explanations and analysis provided in this report, it is recommended that ISPV to be considered as future off-grid solar PV system.
Solar PV hybrid system (SPVHS), Integrated Solar PV system (ISPV), off-grid, lifetime cost