Single-axis solar trackers have become the dominant structural choice for large-scale solar construction in the United States, but there are scenarios where using fixed-tilt racking still makes the most sense.  Single-axis solar trackers have become the dominant structural choice for large-scale solar construction in the United States, but there are scenarios where using fixed-tilt racking still makes the most sense.  Single-axis solar trackers have become the dominant structural choice for large-scale solar construction in the United States, but there are scenarios where using fixed-tilt racking still makes the most sense.  Single-axis solar trackers have become the dominant structural choice for large-scale solar construction in the United States, but there are scenarios where using fixed-tilt racking still makes the most sense.  Single-axis solar trackers have become the dominant structural choice for large-scale solar construction in the United States, but there are scenarios where using fixed-tilt racking still makes the most sense.