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The bifacial gain of East-West vertical and South-facing optimally-tiltedbifacial farms are well established. One wonders if bifacial gain (and theassociated LCOE) may be further improved by tracking the sun. Tracking bifacialPV has advantages of improved temperature sensitivity, enhanced diffuse andalbedo light collection, flattened energy-output, reduced soiling, etc.Monofacial tracking already provides many of these advantages, therefore therelative merits of bifacial tracking are not obvious. In this paper, we use adetailed illumination and temperature-dependent bifacial solar farm model toshow that bifacial tracking PV delivers up to 45% energy gain when compared tofixed-tilt bifacial PV near the equator, and ~10% bifacial energy gain overtracking monofacial farm with an albedo of 0.5. An optimum pitch furtherimproves the gain of a tracking bifacial farm. Our results will broaden thescope and understanding of bifacial technology by demonstrating global trendsin energy gain for worldwide deployment.

Optimum design of tracking bifacial solar farms -- A comprehensive global analysis of next-generation PV