The PV module capacity and solar inverter capacity ratio are commonly referred to as capacity ratio. Reasonable capacity ratio design needs to be considered comprehensively in the light of the specific project.
Hourly level solar data are insufficient to fully capture the magnitude of clipping. Due to decreasing solar module prices, some solar developers are increasing their projects’ inverter loading ratio (ILR), defined as the ratio of DC module capacity to AC inverter capacity. In this study, we examine the operational impacts of this trend.
To maximize a solar project’s value, it can be advantageous to oversize the array relative to the inverter rating to increase system output in partial production conditions. We use the term inverter loading ratio (ILR) to describe this ratio of the array’s nameplate DC power rating to the inverter’s peak AC output rating.
From the analysis of the above influencing factors, under the traditional 1:1 capacity ratio design, the maximum power generation of the photovoltaic system is lower than its installed capacity, and a certain ratio of component over-configuration can make up for the capacity loss of the inverter and improve the utilization rate of the converter.
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