Design of an Optimal off-grid Hybrid Energy System for a Rural Community

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Wemogar Elijah Borweh
Emmanuel Asuming Frimpong
Lena Dzifa Mensah



This paper presents an optimized off-grid PV-diesel generator-battery hybrid energy system for application in an un-electrified rural community and further outlines a procedure for designing such an economical and technically feasible hybrid system. The hybrid optimization model for multiple energy resources (HOMER) software was utilized for simulation and analysis. The criteria of minimum net present cost of system, low CO2 emissions and zero electric load rejection was applied while considering technical issues of PV array, inverter coordination and PV capacity penetration level. For the case study system used, the obtained optimized hybrid energy system configuration is as follows: 68kW PV plant; 40kW Diesel plant; 45.4kW Inverter; and 80kWh battery unit. The proposed hybrid energy system is capable of producing 157685kWh of electricity annually at a levelized cost of energy of 0.55 $/kWh while emitting 51,000 kg of CO2 yearly. To avoid self-shading of the PV array, an appropriate inter-row distance was determined. The total quantity of PV modules and the electrical configuration of the PV array is presented.



Keywords : Hybrid energy system,  Net present cost,  Optimal sizing and  Photovoltaic


World Energy Outlook - International Energy Agency (2011). Available at:

Global Status Report on renewables (2016). Available at:

A. Afzal, H. Kumar and V.K. Sharma, "Hybrid renewable energy systems for energy security using optimization technique", in International Conference & Utility Exhibition on Power and Energy Systems: Issues and Prospects for Asia (ICUE), 2011

Rural Electrification with PV Hybrid Systems - Overview and Recommendations for Further Deployment, an IEA-PVPS report (2013). Available:

M. S. Adaramola, M. Agelin-Chaab, M. and S. S. Paul, "Analysis of hybrid energy systems for application in southern Ghana", in Energy Conversion and Management, vol. 88, pp. 284–295, 2014.

M. S. Adaramola, S. S. Paul and O. Oyewola, "Assessment of decentralized hybrid PV solar-diesel power system for applications in Northern part of Nigeria", Energy for Sustainable Development, vol. 19, pp. 72-82, 2014.

E. S. Hrayshat, "Off-grid hybrid wind-diesel power plant for application in remote Jordanian settlements", Clean Technologies and Environmental Policy, vol. 11, no. (4), pp.425–436, 2009.

HOMER ® Pro Version 3 . 7 User Manual (2016). Available at:

Renewable energy market analysis: The GCC Region (2016). Available at:

Solar PV in Africa: Costs and Markets (2016). Available at:

Planning of a PV Generator - Planning Guidelines - SMA (2013). Available at:

V. Quaschning,Understanding Renewable Energy Systems, 2016.

J.A. Duffie and W. A. Beckman, Solar Engineering of Thermal Processes, Fourth Edition, 2013.

NASA atmospheric science data center (2016). Available at: www.

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