Here is a letter from the Comptroller of the Currency that oversees National Banks. The OCC has lending limits to prevent excessive loans to one entity. In this letter, it appears that the OCC defines multiple Wind Projects to be a Common Enterprise, subject to more restrictive lending limits, if the projects share the following characteristics:

1) Turbine Manufacturer
2) Power Purchaser
3) Geographic Area
4) Construction Contractor

We welcome comments on this issue.

http://windfarmersnetwork.org/Public/OCC%20Letter.pdf