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by conradev 1516 days ago
If it’s not hardware (panels, inverters, brackets, etc) it is considered a soft cost.

NREL’s model puts soft costs at 44% for a 100MW fixed-tilt utility-scale plant in 2021:

https://www.nrel.gov/docs/fy22osti/80694.pdf

The percentage goes up as the installation size goes down, but it is not 70%