Self-sufficiency ratio: an insufficient metric for domestic PV-battery systems?

Sun, Susan Isaya, Kiaee, Mahdi, Norman, Stuart and Wills, Richard (2018) Self-sufficiency ratio: an insufficient metric for domestic PV-battery systems? In Energy Procedia. vol. 151, Elsevier. pp. 150-157 . (doi:10.1016/j.egypro.2018.09.040).

Record type: Conference or Workshop Item (Paper)

Abstract

By installing a home battery to accompany rooftop solar PV, grid electricity usage is reduced and self-sufficiency increased. One motivation for pursuing this goal is environmental concern. By modelling domestic PV-battery systems in this work, self-sufficiency is found not to correlate well with CO2 emissions savings, in some cases even correlating negatively. A system’s complexities, such as transmission and distribution losses, are not encapsulated in self-sufficiency. Self-sufficiency should not be considered in isolation when designing PV-battery systems to maximize CO2 emissions savings.

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e-pub ahead of print date: 1 November 2018

Venue - Dates: 3rd Annual Conference in Energy Storage & Its Applications, University of Sheffield, Sheffield, United Kingdom, 2018-09-11 - 2018-09-12

Keywords: solar PV, environment, home battery, self-sufficiency, CO2, techno-economic modeling