I see there's now over 1GW of installed PV capacity in tracking systems.
What have been the economic factors behind this? I'd pretty much written off both 1-axis and 2-axis tracking in my mind, because of the maintenance issues, and the increased land requirements: together, these meant that fixed mounting would be superior to trackers. And even more so, given how cheap the PV panels themselves have become.
And yet lots of tracking PV capacity has now been built. What are the economic drivers behind this?
Solar Professsional claims lower levelised cost of energy for trackers in various US states:
I guess the IRENA figures for increase in capacity factor in tracking systems is part of the story:
But how did tracking PV get so cost-competitive?