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The largest energy losses and voltage variations from electricity suppliers occur at times of peak demand. Daytime peaks are mainly influenced by large industrial and commercial consumers. The installation of photovoltaic systems without energy storage to supply part of the demand can contribute to stabilize the voltage and reduce losses. These and other benefits constitute the so-called externality of the decrease in off-peak demand due to photovoltaic generation. The objective of this study was to investigate the role of this externality in agroindustry, as a consumer of electrical energy, in order to better understand its effects on the consumer and the utility. The implementation of photovoltaic systems was simulated with the objective to reduce the off-peak contracted demand by agroindustries. Both the energy balance and the economic viability of the photovoltaic system implantation were analyzed. It was concluded that the photovoltaic system contributed to the reduction in energy costs, improved the load factor by about 47%, and reduced the off-peak contracted demand by about 20.2% and 54.2% for the small and medium-sized agroindustries considered, respectively.

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