Borujeni, Masoud Salehi, Ofetotse, Eng L. and Nebel, Jean-Christophe (2021) A solar backup system to provide reliable energy in presence of unplanned power outages. Journal of Energy Storage, 47:103653. ISSN 2352-152X (Print), 2352-1538 (Online) (doi:10.1016/j.est.2021.103653)

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Abstract

Unreliable power grids in sub-Saharan countries have forced households to seek on-site power generation (self-generation) options. Although diesel generators have the largest share of backup systems, the use of solar systems has been growing over the years. This paper presents a solar backup system including PV panels, a battery and a solar hot water (SHW) to provide both reliable energy and hot water to households. Moreover, two different configurations have been studied to improve the hot water system's performance. Whilst the SHW is limited to preheating the electric hot water in the first configuration, in the second it can individually provide the hot water for short-term uses in cases of lack of energy. The solar backup system is equipped with an intelligent prediction-based controller that can control the power flow and the hot water temperature in the presence of power limitations and unplanned power outages. Evaluation of the proposed system using real datasets shows that in addition to delivering reliable energy and hot water, the total cost of the solar solution over the project life is about 25% lower than the diesel generator's, making it a more viable investment.

Item Type:	Article
Uncontrolled Keywords:	power management strategy, prioritised energy resource allocation, diesel generators, optimal sizing, solar hot water
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TD Environmental technology. Sanitary engineering
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science Faculty of Engineering & Science > School of Engineering (ENG)
Last Modified:	28 Nov 2025 11:01
URI:	https://gala.gre.ac.uk/id/eprint/51775

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