Bifacial photovoltaic (PV) tracking systems, where bifacial PV modules are聽mounted to moveable racks that rotate the modules to follow the Sun, are the main聽utility-scale PV system configuration being currently deployed across the world. Today,聽over 90% of modules sold use bifacial cells and over 60% of the market share of聽systems installed use single-axis trackers [1]. The popularity of such system designs聽can be traced to the financial benefits of such systems. Typical tracker gains of 15-20%聽and bifacial gains of 2-10% are additive and these systems provide the lowest levelized聽cost of electricity in about 90% of the world [2].聽

This report provides an overview of current best practices to optimize the聽performance of such systems. The authors are international experts on these topics聽and have reviewed recent literature and industry standards for this report. In addition,聽16 tracker companies (>87% of global market share from 2012-2021) and聽owners/operators of more than 13 GW of PV systems around the world were surveyed聽to learn about real world experience. Additionally, a blind modeling round robin exercise聽was run to evaluate the state of the art in simulating bifacial tracking system聽
performance.聽

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