Relevance of PV with single-axis tracking for energy scenarios - ScienceDirect
Came across this paper from a tweet from one of the authors. It has a really important finding about deep decarbonization scenarios.
There are supporting technology like single-axis tracking systems for solar PV that enable solar not only to cut LOE (by 6% in this case) but to increase the value solar (tracking to enable more morning and evening sun to be produced in this case). The authors model global 100% renewable scenarios dominated by solar and wind. Without tracking solar generates 47% and wind 31%, total 78%. But when single-axis tracking is included in the mix, solar share jumps to 59% and wind drops to 21%, total 80%.
This is a pretty significant shift owing to just one value extending technology. Dual-axis tracking, bifacial PV, and higher density modules also help to capture more sun energy. Battery and other storage also extend the value of both solar and wind energy. I see batteries along with hydro and other storage supplying the bulk of the other 20% needed in a 100% renewable scenario.
Globally, there are a lot of edge cases to consider. But we can imagine a stylized grid as a fairly central case where 20% is generated from wind, 60% direct use solar, and 20% stored solar. This means pairing about 1 MW solar with about 1.5 MWh of storage so that about 25% of generated solar is available as stored energy. For incremental capacity pairing 2MWh storage with 1MW solar should be about right as an easy rule of thumb. Folks, this is quite doable.
So we need to pay attention to these supporting technologies that extend the value of renewables.