Hi Faith

Sorry for the delay. Not sure if you still want an answer but…….

If the generator requires OEM certification, maybe As part of an ongoing service contract, the OEM will have a list of their installed base. Globally!

For a local study of one geographical region, it should be easy enough to make local contacts, on the basis that you know the specific industries in which the generators are installed.

For an academic project, it might be wise to scope what information you can get first, and then build your research question around that.

hope this helps

BW