Water surface reflection characteristics and power generation of bifacial PV modules

Abstract

The power generation characteristics of bifacial PV module on water surface are complicated. This paper proposed a water surface reflectivity model, which takes the light reflection characteristics on the calm water surface and the fluctuating water surface into consideration. The experimental data shows that the average absolute difference between actual water surface reflectivity and simulation data is 0.88%. A power generation model of the bifacial PV module was proposed on the basis of considering of the background reflectivity and the feature of bifacial PV module. The experimental data shows that the average absolute difference between actual PV power generation and simulation data is 2.1%. An approximate power generation enhancement ratio was proposed to estimate the power generation of bifacial PV module. Experimental results show that the average absolute difference between the approximate data and the actual data is 0.7%.